Got an Old Industrial Unit. Could It Become Something Incredible?

In 2026, converting an industrial unit into commercial offices is one of the most cost-effective and profitable property strategies in the UK.
But here’s the catch — without the right planning strategy and design decisions, most conversion projects fail before they even begin.

But here’s the catch — without the right planning strategy and design decisions, most conversion projects fail before they even begin.

Why You Should Convert an Industrial Unit to Commercial Offices in 2026

Before we get into the detail, let’s talk about why this makes such good sense right now.

Why Industrial Spaces Are Perfect for Modern Offices

Since the pandemic, the way businesses use office space has fundamentally shifted. People aren’t just going to the office to sit at a desk and stare at a screen — they can do that from home. When they do come in, they want somewhere that feels different, inspiring, and genuinely worth the commute.
Industrial conversions deliver exactly that. The character and rawness of a former warehouse or factory — the exposed brick, the timber beams, the generous floor-to-ceiling height — creates an atmosphere that no generic new-build office park can match. It’s no accident that some of the most sought-after commercial addresses in Manchester, Liverpool, and across the North West are in converted industrial buildings.

Converting Industrial Units to Commercial Offices: A Greener Choice

Here’s something a lot of people don’t realise: the most sustainable building is often the one that already exists. When you demolish a building and build something new, you lose all the embodied carbon that went into making it — the concrete, the steel, the brickwork. By adapting and reusing an existing structure, you dramatically cut the carbon footprint of your project before a single worker sets foot on site.

Planning for Your Industrial-to-Office Conversion

As we’ll explain in detail below, planning policy changes since 2020 — and updated further in 2025 — have made it significantly easier to change the use of commercial and light industrial buildings. The old barriers have largely come down.

Understanding Use Classes — What Category Does Your Building Fall Into?

Okay, let’s start with the basics of planning. Every building in England sits within a “Use Class” — a category that defines what it can legally be used for. Getting your head around this is essential before anything else.

The 2020 Reforms and Use Class E — A Game Changer

In September 2020, the UK Government introduced one of the biggest shake-ups to the planning Use Classes Order in decades. A huge number of commercial uses — including shops, offices, cafés, gyms, clinics, and importantly light industrial uses — were brought together under a single new category: Use Class E (Commercial, Business and Service).

www.legislation.gov.uk

What this means practically is that if your industrial unit falls within Use Class E (specifically E(g)(iii) — light industrial processes), you can change its use to offices (E(g)(i)) without needing a full planning application, because you’re moving within the same Use Class.

Planning law now treats both as part of the same flexible category.

Important note: This applies to light industrial uses. General industrial (B2) and storage/distribution (B8) uses are not within Use Class E and will typically require a full planning application for change of use. If you’re not sure which category your building falls into, this is one of the first things we’d check for you — get in touch with our team here.

What About Permitted Development Rights?

Even where a full planning application isn’t needed for the change of use, you may still need prior approval from the local authority if you’re proposing significant external changes — new windows, alterations to the facade, new entrances, and so on. Prior approval is a lighter-touch process than a full planning application, but it’s still a formal step with a defined process and timeframe.

[REF: Planning Portal — www.planningportal.co.uk — Change of Use and Permitted Development]

Additionally, even under Use Class E flexibility, local councils can restrict permitted development rights through Article 4 Directions. Some authorities — particularly in areas with strong employment land policies — have put these in place to prevent the loss of certain commercial uses. This is something that varies enormously by location, which is why local knowledge matters so much.

What If My Building Is B2 (General Industrial) or B8 (Storage)?

If your building is used for general industrial purposes (heavy manufacturing, for example) or for storage and distribution, it won’t fall under Use Class E. In these cases, converting to offices will require a full planning application for change of use.

This isn’t necessarily a barrier — councils are generally supportive of schemes that bring underused industrial buildings back into productive commercial use — but it does mean a more involved planning process, a longer timeline, and more engagement with the local authority.

Our planning service covers exactly this kind of application, and we work regularly with local planning authorities across Greater Manchester and the wider North West.

Do You Need Planning Permission? A Practical 2026 Checklist

Let’s make this as practical as possible. Here’s what determines whether you need planning permission for your conversion:

You Probably Don’t Need a Full Planning Application If…

• Your building is currently in Use Class E (light industrial, office, or other Class E use)
• You’re converting to an office use (also Class E)
• You’re not proposing significant external changes
• The site isn’t in a conservation area or subject to an Article 4 Direction

You Will Need Planning Permission or Prior Approval If…

• Your building is in B2 (general industrial) or B8 (storage/distribution)
• You want to make external alterations (new windows, cladding, entrances)
• The site is in a conservation area or near a listed building
• The local authority has an Article 4 Direction in place
• You’re dealing with a site that has flood risk, contamination, or heritage constraints

Pre-Application Consultation — Why We Always Recommend It

Whether or not a full application is needed, we almost always recommend engaging the local planning authority through a pre-application consultation before committing to a design. This is a paid service (costs vary by authority, typically £200–£800 for commercial schemes) but it gives you valuable intelligence before you invest in detailed design work.

The planning officer can flag issues early, confirm the authority’s approach to the site, and often significantly reduce the risk of a refused application later.

[REF: Planning Portal, Pre-Application Advice — www.planningportal.co.uk]

The Building Survey — What You Need to Know Before Design Begins

Before any design work can meaningfully begin, you need to understand what you’re working with. A thorough building survey is essential and will shape everything that follows.

Structural Assessment

Industrial buildings are typically steel or concrete frame structures — which is good news, because these frames are generally very adaptable. But the condition of the frame, roof, slab, and foundations needs professional assessment. Key questions include:

• Is the existing roof in a condition to retain, or does it need replacement?
• What are the existing floor slab levels, and are they suitable for the proposed office layout?
• Is the eaves height sufficient to accommodate mezzanine levels if required?

Key Planning Considerations for North West Councils

If you’re based in Greater Manchester, Merseyside, Cheshire, or the wider North West, here are some of the key planning considerations that will affect your conversion project:

Local Plan Policies

Every local authority has its own Local Plan, which sets out the development strategy for the area. Some councils actively encourage the conversion of underused commercial buildings to improve the local economy; others are more protective of their remaining industrial land.

In Manchester, for example, the Strategic Framework and individual area plans set ambitious targets for economic growth and workspace provision — making well-designed industrial-to-office conversions generally well-received.

[REF: Greater Manchester Spatial Framework / local authority Local Plans — check your specific council’s planning portal]

Flood Risk

A significant proportion of industrial land in the North West sits in areas with some flood risk, particularly in lower-lying river corridors. If your site is in or near a Flood Zone 2 or 3, you will need a Flood Risk Assessment (FRA) as part of your planning submission.

The good news for office conversions is that they are classified as “Less Vulnerable” development under the National Planning Policy Framework, which generally makes them more acceptable in flood-risk areas than residential uses.

[REF: National Planning Policy Framework, Flood Risk — www.gov.uk/guidance/flood-risk-and-coastal-change]

Transport and Parking

Local authorities will scrutinise how your office conversion affects traffic generation and parking. If the site currently has significant lorry movements (because it’s an active industrial site), switching to office use may actually reduce traffic — which is generally a positive in planning terms. However, you’ll need to demonstrate adequate car and cycle parking provision for office staff, and ideally show good public transport connectivity.

Building Regulations — What Compliance Looks Like in 2026

Planning permission (or the absence of a need for it) is just one half of the story. The other half is Building Regulations — the technical standards that govern how the building must perform once converted.

For an industrial-to-office conversion, the key Approved Documents you’ll be working against are:

Part L — Energy Efficiency (Updated 2025–2026)

This is the big one in 2026. Part L of the Building Regulations governs the conservation of fuel and power, and it has been significantly tightened in recent years as part of the UK’s journey towards net zero.

For existing non-domestic buildings (which is what you’re working with here), the relevant document is Approved Document L2B. This sets out energy efficiency requirements for building extensions, material changes of use, and other work to existing commercial buildings.

[REF: UK Building Regulations 2010 as amended — www.legislation.gov.uk — S.I. 2026/60 includes the latest Part L amendments]

In practical terms, achieving Part L compliance for an industrial conversion typically involves:

• Upgrading wall and roof insulation — the thermal performance of an uninsulated industrial shed is nowhere near what’s required for an office
• Installing high-performance glazing — double or triple glazed units replacing older single-glazed rooflights or windows
• Improving airtightness — sealing up the inevitable gaps in an old industrial building
• Installing an efficient HVAC system — mechanical ventilation with heat recovery (MVHR) is increasingly the norm
• Considering renewable energy — photovoltaic panels on industrial roofs can be highly effective and are often a planning positive

The Future Homes Standard (FHS) — expected to fully come into force in 2026–2027 — will push these requirements further still, demanding 75–80% lower carbon emissions than buildings built under the 2013 standards.

[REF: MHCLG / Future Homes Standard consultation — www.gov.uk]

If you’d like to understand how our sustainability service can help you meet and exceed Part L requirements, we’d love to talk.

Part M — Accessibility

Your converted office must be accessible to all users, including people with disabilities. Part M of the Building Regulations sets out the requirements for accessible and inclusive design. For offices, this covers:

• Step-free access to entrances and between floors
• Accessible toilet provision
• Adequate corridor widths and door widths
• Consideration of wheelchair users throughout the layout

A good architect will design accessibility in from the start, not bolt it on at the end.

[REF: Approved Document M — Access to and Use of Buildings — www.gov.uk]

Part B — Fire Safety

Fire safety is a critical consideration, particularly where you’re adding mezzanine floors or creating a multi-tenanted building. The fire strategy needs to address:

• Means of escape for all occupants
• Fire detection and alarm systems
• Compartmentation — fire-resisting construction between different areas
• Access for the fire service

If your building is 18 metres or more in height, additional requirements apply under the Building Safety Act 2022, including the potential need for two staircases in new residential buildings (effective from September 2026 for residential, though the principles are relevant to commercial too).

[REF: Approved Document B — Fire Safety — www.gov.uk; Building Safety Act 2022 — www.legislation.gov.uk]

CDM Regulations 2015 — Health and Safety Duties

The Construction (Design and Management) Regulations 2015 apply to virtually all construction projects, including industrial conversions. They place legal duties on clients, designers, and contractors to manage health and safety throughout the project.

[REF: HSE — CDM 2015 — www.hse.gov.uk/construction/cdm/2015/index.htm]

One of the most important duties under CDM 2015 is the appointment of a Principal Designer — a role that plans, manages, and coordinates health and safety during the pre-construction (design) phase of a project. Under both CDM 2015 and the Building Safety Act 2022, there are now two distinct Principal Designer roles with different duties: the CDM Principal Designer and the Building Regulations Principal Designer. Understanding the difference is important, and we recommend seeking specialist advice.

[REF: RIBA Journal — Building Safety Act: Differences between Principal Designer Roles — www.ribaj.com]

At Muse Architects, we offer a dedicated Principal Designer service that covers both roles.

Designing a Successful Industrial-to-Commercial Office Conversion

Here’s where the magic happens. Good design is what turns a cold, functional shed into a workspace that your team and your tenants will genuinely love. Let’s talk through the key design considerations.

Dealing with Depth and Daylight

One of the biggest challenges with industrial buildings is depth. Warehouses and factories are often very deep — 30, 40, 50 metres from front to back — and natural daylight struggles to penetrate more than about 6–7 metres from a window. For offices, good daylight isn’t just a nice-to-have: it’s a legal requirement.

Offices must meet minimum daylighting standards under BS EN 17037 (Daylight in Buildings), particularly where the converted space will host long-stay desk workers.

[REF: BS EN 17037:2018 Daylight in Buildings — available via BSI — www.bsigroup.com]

Strategies to address this include:

• Roof lanterns and sawtooth skylights — these can flood a deep floor plate with natural light from above
• Atria and lightwells — creating internal courtyards can bring light into the heart of a building
• Enlarging existing window openings — subject to planning and structural considerations
• Strategic internal layouts — placing collaborative spaces and circulation in the deeper, darker zones, and reserving the perimeter for workstations

Internal Space Planning for Modern Work

The open-plan industrial floor plate is actually one of the most valuable things about these buildings — it gives you tremendous flexibility. But raw open plan doesn’t work particularly well as an office without some careful thinking about:

• Acoustic zoning — people can’t concentrate in a cavernous, reverberant space. Acoustic panels, partitions, and careful material choices are essential
• Collaboration and quiet zones — modern teams need both energetic, collaborative areas and quiet spaces for focused work
• Video call pods and booths — these are now considered essential in almost any new or converted office
• Breakout and social spaces — a kitchen, informal seating areas, and an outdoor or semi-outdoor space significantly boost how much people want to come to the office
• DDA-compliant design throughout — see Part M above

Take a look at our commercial design service and our interior 2D/3D layouts service to see how we approach office space planning.

Celebrating the Building’s Industrial Character

One of the biggest mistakes you can make in an industrial conversion is trying to disguise what the building is. Some of the most celebrated office interiors in the country are in converted industrial buildings — and what makes them special is precisely that you can see the steel frame, the brickwork, the original loading bay doors.

Our approach at Muse is to work with the building’s character, not against it. Typical material strategies include:

• Retaining and exposing original brickwork, treating it where needed
• Celebrating structural steelwork — sandblasting and painting rather than boxing in
• Polished or sealed concrete floors (practical and visually striking)
• Timber elements to add warmth — ceiling fins, joinery, furniture
• Reclaimed materials where possible, both for sustainability and for the rich character they bring
• Controlled interventions in neutral tones — cladding, glazing systems, entrance canopies — that are clearly contemporary but respectful of the existing fabric

External Appearance and Streetscape

How the building reads from the street matters — for planning purposes, for the impression it makes on clients, and for how it contributes to the character of the area.

Industrial buildings can look tired and uninviting from the outside. Simple but considered interventions — a well-designed entrance, new signage, improved landscaping, better lighting — can dramatically change how a building presents itself without requiring extensive (and potentially contentious) external alterations.

Where more significant external changes are proposed, we’ll work with you through the planning process to develop an approach that the local authority can support.

Sustainability Considerations When Converting Industrial Units to Commercial Offices

We’ve already talked about Part L compliance, but in 2026 the most ambitious conversion projects are going significantly further than the regulatory minimum. Here’s why that matters, and what it looks like in practice.

BREEAM for Commercial Buildings

BREEAM (Building Research Establishment Environmental Assessment Method) is the UK’s leading sustainability certification for buildings. Many occupiers — particularly larger businesses and public sector organisations — now actively require a minimum BREEAM rating as a condition of taking a lease.

Achieving BREEAM “Very Good” or “Excellent” for a converted industrial building is entirely achievable, but it needs to be designed in from the start. Key areas assessed include:

• Energy performance and carbon emissions
• Water efficiency
• Materials specification (recycled content, responsibly sourced)
• Indoor environment quality — air quality, acoustic comfort, daylight
• Transport connectivity
• Ecology and biodiversity

[REF: BRE Group — BREEAM — www.breeam.com]

WELL Building Standard

The WELL Building Standard takes a different angle, focusing specifically on occupant health and wellbeing. For businesses wanting to attract and retain talent, a WELL-certified workspace is a powerful differentiator.

Heat Pumps, Solar PV and the Move Away from Gas

One of the most significant shifts in 2026 is the practical phasing out of gas boilers in new and substantially renovated non-domestic buildings, in line with the UK’s net zero commitments. For industrial conversions, this means specifying air source heat pumps or ground source heat pumps as the primary heating system, alongside:

• Solar PV panels — industrial roofs are often ideal for these; large, south-facing, unshaded
• Battery storage systems — storing solar energy generated during the day for use in the evenings
• MVHR (Mechanical Ventilation with Heat Recovery) — recovering heat from stale exhaust air to pre-warm fresh incoming air

These technologies cost more upfront but deliver substantial running cost savings for occupants, and they dramatically improve the building’s EPC rating — which increasingly affects its commercial value and lettability.

Our sustainability service and retrofit service cover all of these measures in detail.

How Much Does It Cost to Convert an Industrial Unit to Commercial Offices in 2026?

Right, let’s talk money — because this is usually the question everyone wants answered first.

Construction Costs Per Square Metre (2026)

Based on current BCIS (Building Cost Information Service) benchmarking data for Q4 2025, here are indicative cost ranges for industrial-to-office conversion works:

These figures cover construction works only. You also need to budget for:

• Professional fees (architects, structural engineers, M&E engineers, planning consultants): typically 12–18% of construction cost
• Asbestos removal: highly variable, can range from £5,000 to £100,000+ depending on what’s found
• Planning fees: set by Government, currently around £578 for most commercial applications (check current fee schedule at www.planningportal.co.uk)
• Building Regulations application fees: varies by local authority, typically £500–£3,000 for commercial projects
• VAT: 20% on construction work (note: some conversion work may be eligible for reduced VAT rates — seek specialist advice)
• Contingency: always allow at least 10–15% for unknowns in a conversion project

[REF: BCIS — Building Cost Information Service — www.bcis.co.uk] [REF: Savills UK, Construction Cost Analysis — tender price inflation forecast 2.7% for 2026 — www.savills.co.uk]

Important: BCIS data shows that construction tender price inflation ran at approximately 5% in the year to Q2 2025, with annual increases forecast at 2.7% for 2026. This means the sooner you start your project, the lower your costs are likely to be in real terms.

What Affects Cost the Most?

The biggest variables in an industrial conversion are:

1. Asbestos — what’s found and how much needs removing
2. Roof condition — a failing roof that needs full replacement adds significant cost
3. Services — how much of the electrical, plumbing and drainage needs replacing
4. Mezzanine floors — adding structural mezzanines adds considerable cost but unlocks more usable area
5. Specification level — there’s a vast range between a functional basic fit-out and a BREEAM Excellent, WELL-aligned premium workspace

Step-by-Step Process to Convert Industrial Unit to Commercial Offices

Stage 1 — Feasibility and Site Appraisal

This is where it all starts. Before you commit significant resource, it’s worth getting an architect to carry out a proper feasibility study. This will cover:

• A review of the building’s planning status and Use Class
• A desktop assessment of any planning constraints (flood risk, conservation areas, Article 4 Directions)
• A rough assessment of the building’s structural suitability
• An initial view on likely building regulation compliance requirements
• Early cost benchmarking to test financial viability

We offer a free feasibility study for qualifying projects — it’s a great first step.

Stage 2 — Pre-Application Planning Engagement

If the feasibility looks promising, we’d typically recommend engaging the local planning authority for a pre-application consultation to confirm their appetite for the scheme and flag any issues early.

Stage 3 — Surveys

Instruct a structural engineer, M&E surveyor, and (if the building is pre-2000) a UKAS-accredited asbestos surveyor. These surveys inform the design and the budget with a level of certainty that no amount of desktop work can match.

Stage 4 — Planning Application or Prior Approval

Depending on what’s needed (full application, prior approval, or neither), we prepare and submit the planning submission. Typical determination timeframes are 8 weeks for most applications, 56 days for prior approval under Class MA.

[REF: Planning Portal — planning application timeframes — www.planningportal.co.uk]

Stage 5 — Detailed Design and Building Regulations

With planning secured, we develop the detailed design and prepare a Building Regulations submission. This is where the building’s technical performance — energy, fire, accessibility, structure — is all worked out in detail. The appointment of a Principal Designer under CDM and under the Building Regulations is confirmed at this stage.

Stage 6 — Procurement and Construction

There are several procurement routes available:

• Traditional contracting: You appoint a main contractor based on a fully designed and costed scheme. More control over design, but typically a longer pre-contract period.
• Design and Build: The contractor takes responsibility for completing the detailed design as well as constructing it. Faster, but less design control.
• Two-stage tendering: Useful for more complex or phased projects; brings the contractor in early to inform programme and cost, with a second stage to agree the full contract sum.

For most industrial conversion projects in the £500k–£3m range, traditional contracting with a competitively tendered main contract works well, provided the design is thorough enough to reduce the risk of variations on site.

Stage 7 — Completion, Occupation and Post-Occupancy

Building Regulations completion is signed off by the Building Control body. Post-occupancy, it’s good practice to monitor energy performance against the design predictions — there is often a “performance gap” between as-designed and as-built, and identifying this early allows corrections to be made.

We’ve seen a lot of industrial conversions over the years. Here are the pitfalls that catch people out most often:

Underestimating the unknown. Conversion projects by their nature uncover surprises — asbestos, rotten substructures, inadequate drainage. A contingency of at least 10–15% is not excessive; it’s realistic.

Starting design before surveys are complete. Design decisions made without proper structural, services, and asbestos information often have to be undone later at significant cost.

Ignoring daylight early. Adding roof lanterns or lightwells is much cheaper when they’re designed in from the start than when they’re retrofitted after the structural design is complete.

Not engaging planning early enough. Local authority views can significantly affect the design. Finding out what they think after you’ve invested in detailed drawings is expensive.

Specifying a heating system that can’t be upgraded. If you specify a gas boiler system now, you’re building in a problem for 5–10 years’ time when replacement will be required. Future-proofing with heat pump-ready systems costs little more now.

Frequently Asked Questions

Do I need planning permission to convert an industrial unit to offices?

This depends on your building’s Use Class. Many Class E conversions don’t require full planning permission, but prior approval or restrictions may still apply

How long does the conversion process take from start to finish?

A typical medium-sized industrial-to-office conversion (say 500–2,000m²) takes approximately 12–24 months from initial feasibility to occupation. Planning and building regulations typically take 3–6 months; construction typically 6–12 months depending on scale and specification.

Will I need an asbestos survey?

Yes, if the building was constructed before 2000. A refurbishment and demolition survey by a UKAS-accredited surveyor is a legal requirement before any structural work begins.

H3: Can I add a mezzanine floor?

Usually, yes — adding a mezzanine is a smart way to maximise space when you convert  industrial unit to commercial offices.

However, it must comply with Building Regulations, including structural safety, fire escape, and accessibility (Part M). Planning permission may also be required if it affects the building’s external appearance.

What’s the difference between Use Class E and Use Class B?

Use Class E allows flexible commercial use including offices and light industrial. B2 and B8 uses usually require planning permission for conversion

How Muse Architects Can Help

At Muse Architects, we’re RIBA Chartered commercial architects based in Manchester, and industrial-to-office conversion is one of our specialisms. We’ve worked on projects of all sizes across the North West, and we understand both the planning landscape and the design challenges involved.

Our service covers the full journey — from initial feasibility and planning through to detailed design, Building Regulations, and construction-stage support. We also offer specialist services in:

• Sustainability and retrofit — helping you meet Part L and go beyond it
• Principal Designer — CDM and Building Regulations compliance
• BIM Consultancy — building information modelling for complex projects
• Heritage — if your industrial building has heritage significance
• Commercial design — workspace design that works for your team

We work across the full Industrial and Commercial sector, and you can see examples of our commercial projects in our project portfolio.

If you have an industrial building you’re thinking about converting — or you’ve already started that conversation and you need an architect to help take it forward — we’d love to hear from you. Start with our free consultation or our free feasibility study, and let’s see what’s possible.

📞 Tel: 0161 524 8992
📍 455 Chester Road, Old Trafford, Stretford, Manchester, M16 9HA
🔗 Contact us today