Office Fit-Out Mill Hill
Office fit-outs for small and medium office suites in Mill Hill, partitions, ceilings, lighting and small power for your office, with the IT and specialist trades coordinated.
- Rated 4.9 from 31 reviews on MyBuilder
- UK guide: £70 to £120 per sq ft
- Free site survey, itemised quote
Office fit-out in Mill Hill is small-scale work. The London Plan classes Mill Hill as a District centre, and London Plan Policy E1 names Croydon town centre, not Barnet, as the strategic outer London office location. The office work that arises here is modest: a suite above a shop on Mill Hill Broadway, rooms for an accountant or architect, or a small studio. We fit out those spaces to the tenant's layout, often around neighbours who stay open.
For Mill Hill, 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 Mill Hill: we build the office partitions, ceilings, lighting and finishes as one contract and coordinate the IT supplier and specialist trades around them.
Price guide
| Work | Indicative range |
|---|---|
| Office fit-out, construction only | £70 to £120 per sq ft |
| London office fit-out, all-in | £148 to £359 per sq ft |
| Metal stud partition, boarded both sides | £55 to £65 per m² |
| Suspended ceiling, grid and tile | £22 to £35 per m² |
| Dilapidations at lease end | £15 to £20 per sq ft |
Indicative ranges from published cost guides (Cushman and Wakefield, Oktra and Checkatrade, 2026), not a quotation. Most are UK-wide figures and London work usually costs more; a row marked London is a London figure. Prices checked September 2026.
Quick estimate from UK guide figures
Guide range: choose above

The office space Mill Hill actually has
Office work in Mill Hill tends to mean upper floors and small suites rather than office buildings. The London Plan lists Mill Hill as a District centre, a tier that serves a local catchment, and London Plan Policy E1 places the strategic outer London office location at Croydon town centre. Around Mill Hill Broadway, an office is more likely to be a first or second floor reached by its own stair, a converted house used by a practice, or a small unit in a parade with a back room behind.
That shapes the job in Mill Hill. Floor areas are small, so partitions, a meeting room, a tea point and a WC take up much of the plan. Buildings are often older, with limited riser space for cables and ductwork. Access for materials is up a narrow stair from the street or a rear yard. We survey these limits first, because they decide what ceilings, cooling and data routes are practical before the layout is fixed.
Cat A and Cat B fit-out for a Mill Hill suite
Cat A and Cat B describe who fits what, and the lease usually says which a Mill Hill tenant receives. Cat A is the landlord's base: a finished ceiling, lighting, heating or cooling, raised floor or perimeter trunking where there is one, and working WCs. Cat B is the tenant's layout on top: partitions and glazed screens, meeting rooms, a tea point or kitchenette, extra small power, finishes and signage inside. In a small suite the two are often done together in one programme.
The Cat B works in a Mill Hill office run in a set order. Strip out of the last tenant's partitions comes first, then new stud and glazed partitions, then first fix of lighting and small power, with data containment coordinated with your IT supplier, who installs the network itself. Ceilings, second fix, floor finishes and decoration follow. Lighting and heating controls are set to the new rooms, and furniture arrives once the floor is clean.
Consents, building control and CDM for Mill Hill offices
An office fit-out in Mill Hill needs the landlord's licence for alterations and, for most layouts, building regulations approval. Barnet Council is the building control authority here, or a registered building control approver can be used instead. An office is covered by the Regulatory Reform (Fire Safety) Order, so the fire strategy is drawn and approved before work starts. The items that matter on a non-domestic fit-out are Part B fire safety and means of escape, especially for an upper floor with a single stair, Part M access and accessible WCs where required, and Part L efficiency of lighting and services.
The CDM Regulations also apply, and a business client has duties of its own under them. That means appointing a competent contractor, allowing enough time, and making sure a construction phase plan is in place before work starts. In an occupied Mill Hill building, noisy strip out and drilling stay within the council's permitted hours, timed with the landlord and the tenants above and below. Quiet work such as decoration can run after hours, and we programme both from the licence terms.
Office stock, conversion rights and leaving a Mill Hill office
Office floors across outer London can change to homes, which is why the planning context matters even for a tenant. Class MA of the General Permitted Development Order 2015 permits a change of use from Class E to Class C3 dwellinghouses. London Plan Policy E1 asks boroughs to use Article 4 Directions so that the CAZ, the Northern Isle of Dogs and other office clusters are not undermined by office to residential rights. Whether a Barnet direction covers a particular Mill Hill building is a question for the council's planning records. For a tenant, this affects supply rather than the fit-out.
The end of the lease matters as much as the start. Dilapidations clauses often require a tenant to remove its partitions, reinstate the landlord's ceiling and lighting, and repair and redecorate before handing back a Mill Hill office. Keeping a record of what was installed, and what the Cat A condition looked like at the start, makes that reinstatement faster and helps settle the schedule with the landlord's surveyor. Photographs taken before handover are the simplest evidence.
- Acoustic partitions and door seals for private meeting rooms
- Internal office signage and manifestation on glazed screens
- Suspended grid ceilings and plasterboard ceilings with access panels
VOA Council Tax stock of properties, March 2025, for Mill Hill Broadway, Mill Hill East and Mill Hill Park. Counts rounded by the VOA.
Why Choose GS Renovation in Mill Hill
A small office fit-out is judged on whether you can move in on the day your lease starts, with the network working and nothing left to snag. We give a written programme with dates for strip out, partitions, first fix, ceilings and finishes, and one site lead who deals with the landlord's agent. We agree data routes with your IT supplier before ceilings close, the new lighting and power circuits are tested and certified by a registered electrician, and the handover pack holds the records the landlord and building control ask for.
- One named contact for the landlord, the building manager and your office manager
- Registered in England, Companies House no. 14611254
- Fire alarm, emergency lighting and air conditioning specialists on one programme
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FAQ
Frequently Asked Questions about Office Fit-Out Mill Hill
How much does an office fit-out cost in Mill Hill?
Published guides put the construction part of an office fit-out at £70 to £120 per square foot (Oktra, 2026) and an all-in London fit-out at £148 to £359 per square foot (Cushman and Wakefield, 2026). The survey and your layout fix the scope, and the quote itemises strip-out, partitions, ceilings, lighting, power and making good.
Is there much office fit-out work in Mill Hill?
Only on a small scale. The London Plan classes Mill Hill as a District centre, and Croydon town centre is the strategic outer London office location. The office work here is suites above shops, professional rooms and small studios, and our programmes are sized for that.
What is the difference between Cat A and Cat B for a Mill Hill office?
Cat A is the landlord's finished shell: ceilings, lighting, heating and working WCs. Cat B is the tenant's layout on top: partitions, meeting rooms, tea point, extra power and finishes. In a small Mill Hill suite, both are often carried out together in one programme.
Does an office fit-out in Mill Hill need building regulations approval?
In most cases, yes. New partitions affect fire escape, and new lighting and services fall under Part L. Barnet Council is the building control authority for Mill Hill, or a registered approver can be appointed. We build to the approved details and keep records of fire stopping and installations.
What CDM duties does a business client in Mill Hill have?
A business client must appoint competent people, allow adequate time and resources, and make sure there is a construction phase plan before work starts. We prepare the plan for the works we carry out and keep it on site. Your role is mostly to provide information about the building and its hazards.
Can the fit-out happen while other tenants in the building are working?
Yes, with noisy work timed around them. Strip out, drilling and cutting stay within the council's permitted hours as the landlord allows, and quiet work such as decoration can run after hours. Out of hours, noisy work needs the council's agreement, usually through a prior consent under the Control of Pollution Act. Dust is sealed inside the suite, and the shared stair and entrance are protected and cleaned daily.
What fire rules apply to an upper floor office in Mill Hill?
Part B of the Building Regulations, which covers means of escape and fire separation. An office on a first or second floor above a Mill Hill shop often has one stair, so new partitions must not lengthen the escape route or create inner rooms without a safe way out. The stair may need protecting from the shop below. Barnet Council or a registered approver checks the layout before work starts.
What does a Mill Hill office tenant owe at the end of the lease?
Whatever the dilapidations and reinstatement clauses say. Commonly the tenant removes its partitions and fittings, reinstates the landlord's ceiling and lighting, makes good and redecorates. Reading those clauses before the fit-out lets you choose partitions and fixings that come out cleanly later. Photographs of the starting condition help too.
Can you fit out a small studio or practice office above a Mill Hill shop?
Yes. A design studio or a small professional practice above a shop needs sound separation from the floor below, good ventilation, a tea point and enough sockets and data points at each desk. We check the stair width, the power supply and the drainage route first, because in an older Mill Hill Broadway building those set the layout.
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