Utility and boot room extensions across Greater London

Planning a utility room extension in Greater London? We survey the house, work out the planning route, draw the design and build it, so you deal with one team from the first visit to the completion certificate.

Guide priceFrom £18,000 inc VAT
PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
Towns covered105
Site visitFree, no obligation

Get my guide price Call 0800 088 6341

Utility and boot room with stacked washer and dryer, bench and coat hooks

Towns in Greater London

Do I need planning permission in Greater London?

In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.

The planning position for a specific Greater London address depends on its history and any designations, which is why we check it at the first visit.

Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.

If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.

Applications are decided by the local planning authority (your district, borough or unitary council).

When a utility room extension makes sense

Busy family homes
Houses with a side passage or small rear corner
Kitchens that have run out of space for appliances

A good utility works like a back-of-house corridor: in from the garden, boots off, coats on hooks, washing on the way through. We plan the door positions so it doesn't become another room to walk around.

What should I budget for a utility room extension in Greater London?

Labour and material costs vary across the UK, so for Greater London we use our London factor (×1.3). The ranges include VAT and exclude design, structural and council fees.

Typical rates in Greater London: £2,470 to £4,550 per m² including VAT, depending on specification.

Size	Essential	Standard	Premium
2 m × 2.5 m 5 m²	£18,000 – £22,000	£18,000 – £23,000	£18,000 – £23,000
2.5 m × 3.2 m 8 m²	£19,500 – £23,500	£23,000 – £29,500	£29,000 – £36,500
3 m × 3.6 m 11 m²	£27,000 – £32,500	£32,000 – £40,500	£40,000 – £50,500

Try the guide-price tool to see a range for your own size and finish.

Working in Greater London

Towns we cover in Greater London include Bexley, Barking, Sutton, Croydon, Ilford, Enfield, Harrow, Tottenham. London's housing is dominated by Victorian and Edwardian terraces, many with a rear outrigger and a side return, and 1930s semis in the outer boroughs. Conservation areas are common, so the planning check comes first.

Our process, step by step

Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.

Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.

Questions people ask about utility room extensions

Can I see a price before committing to anything?

Yes. The guide prices on this page are adjusted for Greater London, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.

Who do I contract with for a utility room extension in Greater London?

Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.

How long does a utility room extension take to build in Greater London?

On site, typically 6 to 10 weeks once approvals are in place. Before that, allow 4–10 weeks design and approvals.

How much does a utility room extension cost?

Our guide range is about £2,470 to £4,550 per m² including VAT, with a minimum of around £18,500. An 8 m² standard-spec utility is typically £23,000 to £29,500 in Greater London.

Does a utility extension need planning permission?

Often not, if it is single storey and within permitted development limits. We check this for your property.

Book a free site visit in Greater London

We will measure up, check the planning position and give you honest guide figures.

Free, no-obligation site visit
Planning route checked before you spend on drawings
Written price once the design is agreed
Building control sign-off at the end

Prefer to talk? Call 0800 088 6341 or .

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