Office Fit-Out Belgravia

Office fit-out in Belgravia is small in scale. The district is mainly stucco-fronted townhouses and mews properties, with no office quarter of its own. Where office space exists, it is more likely to be a professional suite in a converted house, a floor above a shop near Elizabeth Street or a studio in a mews building than a modern floorplate. It is still non-domestic work, which brings Westminster building control, escape and access rules and the landlord's licence into even a two-room job.

For Belgravia, the construction part of an office fit-out is published at £70 to £120 per sq ft as a UK guide, and an all-in London office fit-out at £148 to £359 per sq ft (Oktra and Cushman and Wakefield, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Belgravia: we build the office partitions, ceilings, lighting and finishes as one contract and coordinate the IT supplier and specialist trades around them.

Cat A and Cat B in a Belgravia office suite

Cat A and Cat B describe who fits what in a Belgravia office. Cat A is the landlord's base finish: working ceilings and lighting, heating and ventilation, small power to the perimeter, raised or finished floors and WCs. Cat B is the tenant's layout on top of it: partitions and glazed screens, meeting rooms, a tea point or kitchenette, reception joinery, extra power and the data routes your IT supplier cables. Reading the lease tells you which items the landlord has already provided and which you are paying for.

In a converted Belgravia townhouse the rooms already exist, so the fit-out is usually mostly Cat B inside cellular rooms rather than an open floor. Floor to ceiling heights and timber joists rarely leave room for a raised floor, so power and data run in skirting trunking or under lifted boards. Westminster building control treats a fit out as alterations to an existing office or shop with no structural alterations, so a new opening in a wall moves the job into a different category with its own drawings.

Building regulations for non-domestic work in Belgravia

Office work in Belgravia is checked by building control even when nothing structural moves. New partitions can lengthen or block escape routes, which brings Part B and the building's fire strategy into the design, and a single stair in a converted house makes that the first question. Part M covers access and WCs where the layout changes, and Part L covers new lighting and services. Your designer prepares the drawings, and we build and sequence the work so each item can be inspected before it is covered.

Westminster rules out a building notice where the work is affected by the Fire Safety Order, and offices are, so an office fit-out goes in as full plans. The council aims to contact applicants within 5 weeks with a decision on a full plans application, though it says it may take longer, so the application goes in well before the lease start. Painting and decorating are not notifiable and are left out of the estimated cost of works along with VAT, so our quote shows decoration separately for your designer.

Landlord consent and working in an occupied Belgravia building

An office fit-out in Belgravia usually sits in a building with other occupiers, residents above or both. The landlord's licence for alterations comes first, with our method statement and programme attached, and the landlord's surveyor may set rules on hours, access and protection of shared parts. As the commercial client you also carry duties under the Construction (Design and Management) Regulations: appointing competent people, allowing time and passing on information about the building. We explain what those duties mean in practice at the start.

For a Belgravia office that stays open during the works, strip-out and drilling are grouped into planned blocks inside Westminster's normal hours for noisy work, because going outside them needs a Section 61 application made well in advance. Quiet work such as decorating, joinery fixing and cabling can move to evenings where the landlord allows it. Your IT supplier's cabling and switchover are booked into the same programme, and each phase hands a working area back before the next one closes, so staff move desks once.

Landlord systems, service charges and lease end in Belgravia

A Belgravia office suite often shares its heating, fire alarm and water with the rest of the building, so a fit-out connects to systems the landlord owns and recovers through the service charge. We ask the landlord's surveyor early which items are theirs: the alarm panel, the incoming supply, the riser and any shared boiler. New detectors are wired into the existing system by its maintainer or with their sign-off, and any change to a shared system is agreed in writing so the service charge is not disputed later. For context, Westminster removed the Class MA office to home right across its Central Activities Zone by an Article 4 Direction made on 14 July 2021, and the council's maps show whether a building falls inside it.

End of lease, by contrast, is a decision the tenant has to plan for from the start. An office lease normally carries a dilapidations clause, and reinstatement can mean removing your partitions, making good the walls and returning services to the original layout. We record the space before the fit-out starts, keep the drawings of what was added, and can price the strip-out and reinstatement at lease end against the schedule your landlord's surveyor serves. That record makes the final negotiation shorter.

• Office WCs, accessible WCs and staff showers
• LED office lighting with presence and daylight controls
• Metal stud office partitions boarded both sides

VOA Council Tax stock of properties, March 2025, for the Knightsbridge, Belgravia & Hyde Park statistical area, which also covers parts of Knightsbridge. Counts rounded by the VOA.

If you are weighing up office fit-out in Belgravia, it may help to read commercial fit-out in Belgravia, office fit-out across Westminster, what a main building contractor does, how building control works in London, office fit-out across London and Snagging List Guide.

Why Choose GS Renovation in Belgravia

A Belgravia business taking a suite in a converted house or above a shop needs a fit-out contractor who can work quietly around residents and other occupiers. We give a written quotation after a site visit, build to your designer's approved drawings, coordinate the electrician, the fire alarm installer and your IT supplier in one programme, and hand over the certificates that building control completion needs. The founder has more than thirty years of hands-on experience in finding the old-building problems that stall an office programme.

• Every new office circuit certified to BS 7671 by a registered electrician
• Rated 4.9 from 31 reviews on MyBuilder
• Office strip-out and core drilling booked outside other tenants' working hours

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254).