Commercial Interior Fit-Outs in London
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High-performance interiors built for business.
A successful commercial interior is more than decoration — it is an environment engineered for productivity, customer experience, and long-term operational performance.
At Bigness Group, we specialise in delivering commercial interior fit-outs for offices, retail units, showrooms, hospitality venues, and mixed-use buildings across London.
From CAT A and CAT B fit-outs to complete interior refurbishments, our team provides precision, speed, and premium finishing.
Our Commercial Fit-Out Services
CAT A Fit-Outs
Suspended ceilings, raised floors, lighting, HVAC, fire systems, core services and base finishes ready for tenant occupation.
CAT B Fit-Outs
Full interior design and fit-out based on the tenant’s brand and operational needs — partitions, kitchens, offices, meeting rooms, breakout areas, furniture layouts, custom joinery and decor.
Office Interior Fit-Outs
Open-plan offices, meeting rooms, conference rooms, phone booths, communal areas, IT infrastructure, and ergonomic layouts.
Retail Fit-Outs
Display areas, shelving, lighting design, service counters, wall units, branding integration and customer flow optimisation.
Showrooms & Product Display Spaces
High-impact layouts, premium lighting, bespoke joinery and customer experience design.
Hospitality Interior Fit-Outs
Restaurants, cafés, bars, lounges and reception areas built with durable, hygienic, and atmospheric finishes.
Commercial Refurbishment & Modernisation
Upgrades to outdated commercial interiors with new flooring, ceilings, partitions, lighting, HVAC, fire compliance and decorative finishes.
M&E, Systems & Compliance
Every commercial interior must meet strict safety and performance standards.
We manage:
- HVAC, ventilation & air conditioning
- Fire alarms, AOVs, emergency lighting
- Data cabling, Wi-Fi networks & server rooms
- Access control & CCTV systems
- Electrical installation & lighting design
- Partitioning & acoustic control
- DDA accessibility standards
- Building control certification
- Full H&S and CDM compliance
We ensure your interior is not just beautiful — but fully functional, safe and compliant.
Our Fit-Out Delivery Process
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Consultation & Space Assessment
Understanding your business needs, branding, and operational goals. -
Design & Specification
Layout plans, material schedules, lighting design, and functional zoning. -
Pre-Construction Preparation
Programme scheduling, procurement, logistics and compliance planning. -
Construction & Fit-Out Works
Ceilings, partitions, M&E, flooring, joinery, painting, furniture integration. -
Finishing & Detailing
Lighting alignment, décor, signage, and final styling touches. -
Testing, Certification & Handover
Systems testing, building control approval, fire compliance, O&M manuals.
We deliver clean, organised, and disruption-minimised fit-outs.
Why Businesses Choose Bigness Group
- Fast, reliable turnaround for commercial clients
- Seamless coordination of MEP, fit-out and compliance
- Skilled commercial installers and joiners
- Strong understanding of brand-driven interior design
- Scalable resources for projects of all sizes
- Detailed project management with clear communication
- Future-ready fit-outs built for heavy daily use
We build interiors where businesses perform at their best.
FAQ – Commercial Interior Fit-Outs
Q: Do you handle both CAT A and CAT B fit-outs?
A: Yes — full base build and fully branded, tenant-ready environments.
Q: How long does a commercial fit-out take?
A: Typically 2–10 weeks, depending on size and complexity.
Q: Do you work outside business hours?
A: Yes — night and weekend works available to minimise disruption.
Q: Can you integrate HVAC, fire safety and data cabling?
A: Absolutely — full M&E integration is a core part of our commercial service.
Our Commercial Fit-Out Projects in London
Our portfolio includes office suites, retail spaces, beauty salons, showrooms, hospitality venues and mixed-use developments across London. We focus on delivering interiors that balance aesthetics, practicality and compliance — ensuring each space supports productivity, flow, and brand identity. Every project is completed with premium finishing, clear system integration, and long-term durability in mind.
Commercial Fit-Outs in London by Borough
We deliver commercial interior fit-outs across all major business districts in London, from central corporate zones to high-street retail corridors. Our experience with borough-specific regulations, access logistics, and commercial landlord requirements ensures smooth delivery and fast approvals. Whether your site is in a high-rise office tower or a local retail parade, we adapt to the needs of the building and the business to deliver a seamless fit-out.
Barking and Dagenham / Barnet / Bexley / Brent / Bromley / Camden / Croydon / Ealing / Enfield / Greenwich / Hackney / Hammersmith and Fulham / Haringey / Harrow / Havering / Hillingdon / Hounslow / Islington / Kensington and Chelsea / Kingston upon Thames / Lambeth / Lewisham / Merton / Newham / Redbridge / Richmond upon Thames / Southwark / Sutton / Tower Hamlets / Waltham Forest / Wandsworth / Westminster
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