House extensions · West & North Yorkshire
How much does a house extension cost in Yorkshire?
Wondering how much a house extension might cost in Leeds, Wetherby, Wakefield, Castleford, Harrogate, York or Ripon? Use the free calculator below for an instant indicative range for typical Yorkshire projects — no contact details required. When you are ready, arrange a visit for a formal quotation. Or call 01937 208224.
Extensions built around your home
If you love your home but need more space, a well-designed extension can be a practical alternative to moving. We help homeowners across West and North Yorkshire add usable living space without unnecessary complication — with clear quotations, a managed build and a finish that matches the existing house.
- Single-storey rear and side extensions
Open-plan kitchens, dining and living spaces with strong indoor–outdoor links, large glazing and garden access. - Two-storey additions
Extra bedrooms and bathrooms above, living space below — planned as one coherent build without taking more garden than needed. - Kitchen and family room extensions
Bigger cooking and dining areas, islands and storage, coordinated with structural openings and finishes.
From our Thorp Arch base we cover Leeds, Wetherby, Wakefield, Castleford, Harrogate, York, Ripon and surrounding towns. See areas we cover.
Not sure why quotes differ so much? Read our short guide on comparing extension prices before you request quotes.
Request a quote →
Illustrative imagery — real project photos coming soon.
What to expect
After an initial conversation we visit where helpful, talk through options and constraints, and set out a clear route for design, permissions and construction. You get straightforward advice on what is realistic for your plot and home — not exaggerated promises. See a recent Harrogate timber-frame extension for how a compact rear addition can change how a house works.
Free · no details required
House extension cost estimate
Answer a few questions for an instant indicative range for typical Yorkshire projects — you do not need to leave a name, email or phone number first. This is not a quote. Figures exclude VAT (shown as plus VAT). When the range looks useful, arrange a visit for a formal quotation.
Indicative estimate (from calculated figure up to +10%), plus VAT
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What this estimate assumes
Survey required: Full demolition and/or complex drainage is flagged — this estimate has lower confidence until a site survey confirms scope and cost. Those works are not auto-priced here.
House extension cost FAQs
How much does a house extension cost in Yorkshire?
It depends on size (length × width or floor area), whether it is single or two-storey, Basic vs typical finished, and extras such as bi-fold doors, kitchen or bathroom fit-out labour, structural steel, or a simple party wall. Use our free calculator for an indicative Yorkshire-typical range — no contact details needed — then arrange a visit for a formal quotation. Figures are plus VAT.
How much does a rear extension cost in Leeds or Wetherby?
Typical finished single-storey rear extensions are priced largely by floor area; two-storey builds use a rate per m² of total floor area across both floors. Building control / build-over is allowed for in every estimate. Optional glazed doors, fit-out labour, steel, roof lanterns and access add cost. The online figure is indicative only; a visit is required before any firm price. All figures are plus VAT.
Is the online extension calculator a quotation?
No. It is an indicative estimate only for typical Yorkshire projects. The range starts at the calculated figure and goes up to about 10% more. VAT is separate (plus VAT). A site visit is required for a formal quotation. Full demolition or complex drainage needs a survey and is not auto-priced.
What is included in the extension estimate?
The estimate assumes Basic or typical finished build based on your answers, always includes a building control / build-over allowance, and folds in any optional extras you select (bi-folds, kitchen or bathroom fit-out labour, steel, party wall, roof lantern, difficult access). No £ line breakdown is shown. Unusual ground, full demolition and complex drainage sit outside the ballpark until surveyed.
Which areas do you cover for house extensions?
We work across West and North Yorkshire from our base at Thorp Arch Trading Estate — including Leeds, Wetherby, Wakefield, Castleford, Harrogate, York and Ripon. Call 01937 208224 if you are nearby and unsure.
Planning an extension?
Share a few details about your home and what you’d like to achieve — or call 01937 208224. We’ll advise on sensible next steps.