Utility and boot room extensions across King's Lynn
Planning a utility room extension in King's Lynn? 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 price in King's LynnFrom £14,500 inc VAT
- PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
- Build time6–10 weeks on site
- Postcode districtsPE30, PE34

Working in King's Lynn
Site visits are available across King's Lynn (PE30, PE34). Neighbouring towns we cover include Dereham (23 miles), Thetford (28 miles), Wymondham (32 miles), Norwich (39 miles).
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
Guide prices for King's Lynn
For King's Lynn we adjust our national guide rates by ×1.06, the factor we use for East of England. Figures include VAT; your written quote after the survey replaces them.
Typical rates in King's Lynn: £2,010 to £3,710 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 2 m × 2.5 m 5 m² | £14,500 – £18,000 | £14,500 – £18,500 | £14,500 – £19,000 |
| 2.5 m × 3.2 m 8 m² | £16,000 – £19,500 | £19,000 – £24,000 | £23,500 – £30,000 |
| 3 m × 3.6 m 11 m² | £22,000 – £26,500 | £26,000 – £33,000 | £32,500 – £41,000 |
For a figure based on your own dimensions, use our guide-price tool.
What is included
- Back door and a hard-wearing floor
- Waste and water connections
- Built-in storage or space ready for your units
- Design around appliances, sink and storage
- Ventilation for a tumble dryer
Will the council need to approve it?
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.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
Building over or within 3 m of a public sewer needs the water company's consent, usually through a build-over agreement, before the foundations go in.
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).
From first visit to completion
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
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions people ask about utility room extensions
Who do I contract with for a utility room extension in King's Lynn?
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.
Do I need building regulations approval in King's Lynn?
Yes. Almost every extension needs it, whatever the planning route. We prepare the drawings and book the inspections.
Will my neighbours in King's Lynn be involved?
If a planning application or prior approval is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.
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.
How much does a utility room extension cost?
Our guide range is about £2,010 to £3,710 per m² including VAT, with a minimum of around £15,000. An 8 m² standard-spec utility is typically £19,000 to £24,000 in King's Lynn.
Book a free site visit in King's Lynn
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 .
Book a free site visit
Tell us a little about the project and we will arrange a time.