House extensions in Whitehaven
From a small utility to a two-storey addition, we take on house extensions throughout Whitehaven, starting with a free visit and a planning check.
- Postcode districtsCA28
- Price regionNorth West England (×0.95)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Whitehaven need planning permission?
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 England a single-storey side return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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.
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).
Choosing the right extension in Whitehaven
Across the North West, terraced houses with small rear yards suit compact rear and side return extensions, while suburban semis have room for more.
For many houses here, double-storey extensions, single-storey rear extensions or kitchen extensions gives the most useful space for the budget.
Covering Whitehaven and nearby
Across CA28, we can visit, measure and advise. Neighbouring towns we cover include Workington (7 miles), Ulverston (31 miles), Penrith (33 miles), Barrow-in-Furness (34 miles), Carlisle (35 miles). Just over the Lancashire border, Morecambe is about 44 miles away.
What extensions cost in Whitehaven
Prices on this page use our North West England factor of ×0.95, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £38,500 – £49,500 |
| Kitchen extensions | 20 m² | £39,500 – £50,500 |
| Extensions over a garage | 12 m² | £23,500 – £31,000 |
| Conservatory replacement extensions | 14 m² | £28,500 – £37,000 |
| Orangery extensions | 16 m² | £42,500 – £53,500 |
| Double-storey extensions | 32 m² | £54,500 – £71,500 |
| Side return extensions | 11 m² | £25,000 – £31,500 |
All extension types we build in Whitehaven
- Annexe extensions · from £52,000
- Orangery extensions · from £28,500
- Single-storey rear extensions · from £19,500
- Timber frame extensions · from £19,500
- Side extensions · from £20,500
- Pitched roof extensions · from £21,000
- Utility and boot room extensions · from £13,000
- Bedroom extensions · from £24,500
- Porch extensions · from £3,800
- Wraparound extensions · from £34,000
- Extensions over a garage · from £22,500
- Conservatory replacement extensions · from £19,000
- Planning permission for extensions · from £300
- Bungalow extensions · from £24,500
- Kitchen extensions · from £25,500
- Flat roof extensions · from £19,500
- Double-storey extensions · from £36,000
- Side return extensions · from £17,000
- Extension plans and drawings · from £1,100
- Glass box extensions · from £28,500
- Home office extensions · from £15,000
- Building regulations for extensions · from £850
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Whitehaven
How much does an extension cost in Whitehaven?
Using our North West England factor (×0.95), a standard-spec single-storey extension of 20 m² is a guide £38,500 to £49,500 including VAT, and a 32 m² two-storey extension £54,500 to £71,500. Your written price follows the survey.
How long does an extension take in Whitehaven?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Do you cover all of Whitehaven?
Yes, including the surrounding parts of Cumbria. Site visits are free and there is no obligation.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Whitehaven
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.