Mid Market
8B View profile
8build
Multi sector fit out delivery with UK and Asia reach.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
London office refurbishment companies, compared properly
Every fit out and refurbishment firm in London we can verify, from £200m enterprise contractors to boutique studios for offices under 3,000 sq ft. Filter by project size, compare side by side, shortlist in minutes.
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Showing 66 companies
Featured firms
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Paid placements, clearly labelled. Featured firms are still verified the same way and still sit in the alphabetical list below.
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Every verified company, A to Z
Mid Market
AI View profile
AIS Interiors
Global delivery capability for multinational clients. 45+ years experience.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Mid Market
AA View profile
Ambit (Ambit Moat)
Landlord Cat A/A+ refurbishment specialist. Refurbishment of occupied buildings.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
B CorpMid Market
AF View profile
Area (Fourfront Group)
Coworking/flex space, education, laboratory fit out. Founders of The United Workplace global network. 10+ offices across Europe.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Boutique
AS View profile
AW Spaces
Sustainability specialist D&B. Biophilic design. Green materials. Old Street tech hub location.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
BI View profile
Base Interiors
End to end refurbishment. 12 month defect period aftercare. Global brand client base.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
BI View profile
BEH Interiors
Cat A vacant office refurbishment for landlords, developers and agents. Fast professional turnaround.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Boutique
BI View profile
Biofilico
Niche biophilic/wellness consultancy. TEDx speaker founder. ESG advisory for developers. Certification services.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
BP View profile
Blok Projects
Scalable services for any project size. Dedicated project managers. Budget flexibility. Greater London.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
BW View profile
BW: Workplace Experts
Defect free delivery ethos. Projects £1m to £50m+. Fiercely independent. Directly employs many tradespeople.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Mid Market
CG View profile
Claremont Group Interiors
70%+ repeat business. Hybrid workspace design.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Mid Market
CO View profile
COEL
Office AND laboratory design & build. Science/biotech sector strength. Cambridge Oxford Arc and London focus.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
CC View profile
Collins Construction
Nearly 70 years in business. Project range £50,000 to £30 million. Cat A & Cat B fit out. Public sector.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
CS View profile
Constructive Space
Directly employs own tradesmen (rare in sector). Strong charity/not for profit sector presence.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Boutique
CR View profile
Craftex
Low carbon fit out solutions. Energy performance upgrades. EPC improvements.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Enterprise
CW View profile
Crown Workspace
Global operation with 60+ years' experience. B2B focused.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
DE View profile
Denton
Cut & carve refurbishments (complex, high impact). B Corp values. National multi site rollouts.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
ED View profile
Easton Design Office (EDO)
Start up and incubator spaces. Publishing sector. Master planning. 20+ years.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
FG View profile
Fenway Group
Sustainable interior retrofit specialist. Single source for all services. Ongoing churn management and facilities support.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
FF View profile
Form Fit Out
Independent. Education/university/school fit outs. Change of use projects. Based in Clerkenwell.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
FO View profile
Fusion Office Design
500+ completed projects.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Boutique
GG View profile
GXI Group
Flat management structure. Diverse sectors (banks, recruitment, law firms, hotels, education). Fast track delivery. 25+ years.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
IB View profile
Imperial Building Solutions
Fixed price quotes. Guaranteed delivery programmes. Central London focus (Farringdon, Clerkenwell, Piccadilly, Soho, Mayfair).
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
II View profile
Initial Interiors
Commercial contractor for tenants, landlords & architects. City of London and West London specialist.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
B CorpMid Market
IN View profile
Interaction
Sustainability first. £150k annual sustainability commitment. VR walkthroughs. Flex/coworking design.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Boutique
JR View profile
JBH Refurbishments
Turnkey office fit out. Medical fit out capability. Free complementary site visits. London, Kent, Surrey, Sussex.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
KS View profile
K2 Space
Furniture consultancy in DNA. Financial services and legal sector strength.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
KI View profile
Kova Interiors
250+ completed projects. Instant online fit out cost calculator. Multi sector (commercial + healthcare + retail). Phased works.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
LC View profile
Lanext Construction
Eco conscious approach. Works in listed central London buildings. London, Essex, Surrey, Hertfordshire, Hampshire.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
LF View profile
London Fit Out Ltd
One stop shop with strong sub contractor network and in house tradesmen.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Enterprise
MM View profile
M Moser Associates
Global workplace strategy and design. Biophilic design, WELL and green building certification. Research driven approach.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Enterprise
MI View profile
Mace Interiors
High end corporate fit outs, digital twin technology, programme driven delivery.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
MI View profile
Maris Interiors
10,000+ projects completed.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Boutique
ML View profile
Meronden Limited
40+ years. Director is President of the FIS board. School refurbishment specialist. Bespoke joinery.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Enterprise
ML View profile
Morgan Lovell
Design led office fit out, workplace consultancy, biophilic design. 78%+ repeat business rate.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Boutique
MI View profile
MPL Interiors
Estate agent interior design. Healthcare/dental surgery refurbishment. In house branding services.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Boutique
ML View profile
MRO Ltd
High end luxury office refurbishment. Bespoke designs. Lifetime guarantee on work. City of London focus.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
OI View profile
Oaktree Interiors
Landlord fit out specialists. Cat A+ plug and play spaces. People centric approach. In house tradespeople.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
OI View profile
Octopus Interiors
Economically priced fit outs for SMEs. Offices 1,000 to 10,000 sq ft. Owner operated (Crispin Maby, 20+ years experience).
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
OD View profile
ODGroup
Award winning. Landlord and occupier services. Sustainability focus.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
OP View profile
Office Principles (OP Group)
Collaborative 6 step process. 3D visualisation. Award winning with 35+ years in the industry.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
OF View profile
Officescape
Evidence based design. Agile working pioneer. One of the oldest firms in the market (72+ years).
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
B CorpMid Market
OK View profile
Oktra
Design & build exclusively. Coworking/flex design. University refurbishment.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Enterprise
OV View profile
Overbury
UK's leading fit out specialist. 91% net promoter score. Projects up to £200m.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
PA View profile
Parkeray
Three divisions: Lite (under £500k), Interiors (larger schemes), Regions (Cambridge/Home Counties). Wellness driven design.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Mid Market
PR View profile
Peldon Rose
End to end bespoke design & build. In house M&E team. 30+ years London specific experience.
- Projects
- 5k to 30k sq ft
- Client size
- 80 to 400 staff
- Budget
- £1m to £10m
Public data, March 2026Profile
Mid Market
PO View profile
Portview
High end institutional fit outs. Education, commercial, and cultural sectors.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
PI View profile
Prestige Interiors
Integrated services (fit out + M&E + IT infrastructure). London, Berkshire, Surrey, Kent coverage.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
PC View profile
Proici Commercial Interiors
Free office design on all projects. Crittall glass partitions. Bespoke joinery. National coverage from Clerkenwell base.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
PR View profile
Property Refurbishment London
Luxury/high end refurbishment in prime central London. Family run. Tiered packages (basic to premium).
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
RI View profile
Rap Interiors
RIBA qualified design team. Biophilic design. Activity based working. Multi sector (offices, schools, industrial). 30+ years.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
RE View profile
Respace
Family run, independently owned. Cat B fit outs. Landlord refurbishments. Nationwide capability from small base.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Mid Market
SI View profile
Saracen Interiors
25+ years experience across London, Manchester and Hampshire offices.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
SS View profile
Soul Spaces
London's only full service workplace consultancy specifically for SMEs. Limits to 5 projects at a time. Offsets 20 tonnes of carbon per £200k spent.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Enterprise
ST View profile
Structure Tone
Major global player in corporate fit out with significant London operations.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
TP View profile
Talis Projects
Fast track capability for out of hours work. Fully traceable supply chain materials.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Enterprise
TD View profile
Tétris Design & Build
Global design & build backed by world's largest real estate services company. Operates in 20+ countries with local London expertise.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
TI View profile
The Interiors Group
International luxury brands. Prestigious capital projects across Dublin, London and Middle East.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
TI View profile
Thirdway Interiors
Part of Thirdway Group diversified across architecture, managed workspace, and furniture.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Boutique
TB View profile
Trevor Blake Fit Out
People first approach. Educational sector strength. Acoustic furniture.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Boutique
TC View profile
Trifle Creative
Consultancy led. Agile working design. Research based approach. Spatial feasibility studies.
- Projects
- Under 5k sq ft
- Client size
- Up to 40 staff
- Budget
- £50k to £500k
Public data, March 2026Profile
Enterprise
UN View profile
Unispace
Integrated strategy design construction. London serves as EMEA HQ. Brands include Unispace Life Sciences, Bulb Interiors, Downstream.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
VC View profile
Virtus Contracts
Heritage buildings to modern developments. 15% faster than industry average. 1,000 to 50,000 sq ft projects.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Mid Market
WG View profile
Wagstaff Group
Right first time mindset. Manages multiple trades in house. Multi year client relationships.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Enterprise
WD View profile
Willmott Dixon Interiors
Heritage preservation, sustainable refurbishment, public sector. 500,000+ sq ft delivered in prestigious London locations.
- Projects
- 30k+ sq ft
- Client size
- 250+ staff
- Budget
- £5m and above
Public data, March 2026Profile
Mid Market
ZW View profile
Zentura Workspace
4D Approach (Define, Design, Deliver, Devote). Fixed price guarantees. 3 year Zencare aftercare warranty. 5% profits donated to charity.
- Projects
- 5k to 30k sq ft
- Client size
- 40 to 250 staff
- Budget
- £300k to £5m
Public data, March 2026Profile
Browse by need
Start from what you are trying to do
Nine curated lists, each with a decision framework above the firms and a comparison tool on every card.
01 65
Office Refurbishment Contractors
Firms that deliver refurbishment work on site, grouped by the project sizes they take on.
Browse 02 63Office Fit Out London: Companies and Contractors Compared
Cat A, Cat B and design and build firms from boutique studios to enterprise contractors.
Browse 03 18Small Office Fit Out Companies
Boutique firms for offices under 5,000 sq ft, £50k to £500k, one team end to end.
Browse 04 52Commercial Fit Out and Refurbishment Companies
Contractors covering offices, retail, hospitality and landlord common parts.
Browse 05 45Office Refit Companies
Boutique and mid market firms for upgrading space you already occupy.
Browse 06 20Cat B Fit Out Contractors
Every firm that lists tenant Cat B fit out as a service.
Browse 07 14Office De-fit and Strip Out Contractors
Strip out, dilapidations and reinstatement at lease end.
Browse 08 19Office Design and Build Companies
Design, cost and construction under one contract.
Browse 09 28Best Office Refurbishment Companies
Firms that pass at least one objective test: scale, thirty years trading, or B Corp.
Browse 10 7Retail and Restaurant Fit Out Companies
Contractors that list shop, restaurant, hotel and leisure fit out alongside workspace.
BrowseThree markets, not one
Pick the band that matches your floor
London fit out firms rarely compete across size bands. Start with yours and the shortlist gets short fast.
Boutique
Under 5,000 sq ft
One team designs, builds and furnishes. Scale ups, professional services and creative firms.
18firmsUp to 40staff£50k to £500kbudget
Boutique firms 
Mid market
5,000 to 30,000 sq ft
The core of the occupier market. Usually design and build with a dedicated project manager.
39firms40 to 400staff£300k to £10mbudget
Mid market firms 
Enterprise
30,000 sq ft and above
Landlord Cat A programmes, headquarters and phased multi floor schemes with an independent architect.
9firms250+staff£5m and abovebudget
Enterprise firms By borough
Every London borough
Thirty three pages, one per borough, each with the firms based there, the firms that work there, and a note on the local office stock. Hover to see head office counts, click to open.
No firm based here1 to 23 or more
Hover a borough
What it costs
Full cost guide London rates, per square foot
Standard to good specification, 2026. Furniture, IT and AV are usually priced separately.
£50 to £150Cat B fit out, standard to good spec
£100 to £150Cat A base build, paid by the landlord
£80 to £120Design and build, mid range spec
£200+Premium finishes, labs, trading floors
4 to 30 weeksOn site, by size, plus 4 to 12 weeks of design
Guides
All 12 guides Read before you brief anyone
Short explainers that answer the questions every first meeting starts with.
Cost guide
How much does an office refurbishment cost in London?
Rates by size and spec, three worked examples, what moves the price and what is usually left out of the quote.
Read the guide
Explainer
Cat A vs Cat B fit out
What the landlord provides, what the tenant pays for, and where Cat A+ sits between them.
Read the explainer0Companies listedCompiled from public sources
0Enterprise contractors30,000 sq ft and above
0Boutique specialistsUnder 5,000 sq ft
0B Corp certifiedVerified third party standard
Free matching
Not sure where to start?
Tell us the floor area, the budget and the timing and we will introduce three suitable firms from the directory. No fee, no obligation, and no company pays for the introduction.
Get matched How it works
How to use this directory
The London office refurbishment market splits into three tiers that rarely compete with each other. Enterprise contractors such as the Morgan Sindall and Mace interiors divisions deliver landlord Cat A programmes and corporate headquarters at £5m and above. Mid market design and build firms handle the bulk of occupier projects between 5,000 and 30,000 sq ft. Boutique studios serve companies under 5,000 sq ft where a single team designs, builds and furnishes the space. Start with the size band that matches your floor area, then narrow by what you need.
If you are appointing a firm to do the physical work to someone else's design, use the list of office refurbishment contractors. If you want design, cost and delivery under one contract, the design and build companies page is the shortlist. Tenants fitting out a newly leased floor should look at Cat B fit out contractors, and anyone upgrading space they already occupy without moving out will find the phased specialists under office refit companies. Leaving a building as well as entering one means a dilapidations liability, which the de-fit and strip out contractors handle.
Firms here work across the City, Canary Wharf, the West End, Shoreditch and Clerkenwell, the South Bank and the wider M25. Typical costs, programmes and what is usually excluded from a square foot rate are in the office refurbishment cost guide.
List your company
Listings are free for any London office refurbishment or fit out company. Claim yours to update details, add a logo and receive enquiries. Featured placements sit at the top of the relevant lists, clearly labelled.
Common questions
What is the difference between Cat A and Cat B fit out?+
Cat A covers the basic building services a landlord provides to make a shell space lettable: raised floors, suspended ceilings, basic M&E, fire detection. Cat B is the tenant's responsibility and includes everything to make it work for their business: partitioning, meeting rooms, kitchens, branding, furniture, IT infrastructure, and specialist lighting.
How much does an office refurbishment cost in London?+
Costs vary by scope and spec. Cat A typically runs £100 to £150 per sqft. Cat B ranges from £50 to £150 per sqft for standard specs, rising to £200+ for premium. A full design and build at mid range spec usually falls between £80 and £120 per sqft. Smaller boutique firms can be more competitive for projects under 5,000 sqft.
How long does an office fit out take?+
A small refurbishment (under 3,000 sqft) takes 4 to 8 weeks from design sign off. Medium projects (3,000 to 10,000 sqft) run 8 to 16 weeks. Large scale fit outs (10,000+ sqft) can take 16 to 30+ weeks. Add 4 to 12 weeks for design and planning before construction starts.
What should I look for when choosing a refurbishment company?+
Key factors: relevant experience in your sector and project size, accreditations (ISO 9001, CHAS, Constructionline), repeat business rate (strong indicator of satisfaction), whether they employ tradespeople directly or fully subcontract, project management approach, insurance levels, and recent references. B Corp and sustainability credentials are increasingly important.
Do I need planning permission for an office refurbishment?+
Most internal refurbishments don't need planning permission. You may need approval if changing the building's use class, altering the external appearance, working on a listed building or in a conservation area, or making structural changes. Your landlord's consent is almost always required. Check your lease for dilapidation and reinstatement obligations.
More detail in the cost guide and Cat A vs Cat B explainer.