The 10 extension builders from Google's results for Cambridge, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleCambridge
Stefan Buildings delivers house extensions, garage conversions, house renovations, and new home construction across Cambridge and Cambridgeshire. Their services include full architectural design, structural work, and complete kitchen supply and installation.
on GoogleHiston, Cambridge
Operating out of Histon, this firm constructs loft conversions, house extensions, garage conversions, and new builds across the Cambridge area. Additional projects include kitchen and bathroom fitting, roofing, home insulation, and custom shelving.
07775 563882 43 Park Ln, Histon, Cambridge CB24 9JJ
on GoogleMaulden, Bedford
Tye Architects designs single-room and multi-storey home extensions for clients in Milton Keynes and across the UK. The firm manages architectural design for residential properties seeking additional living space.
01525 406677 Poplar House, Limbersey Ln, Maulden, Bedford MK45 2EA
on GoogleCambridge
Vergolus carries out traditional and modular house extensions for properties in Milton Keynes. The company handles projects from initial planning permission guidance through to final construction, providing extra living space for local homeowners.
on GoogleComberton, Cambridge
Extensions handles architectural planning for light-filled wrap-around kitchen extensions and terraced home additions in Cambridge, Bishops Stortford, and Saffron Walden. They navigate local council planning regulations for properties situated within conservation areas.
01223 262028 4 Kentings, Comberton, Cambridge CB23 7DT
on GoogleSt. Ives
Graham Handley Architects designs phased house extensions and internal alterations for Victorian terrace properties in Cambridge and St. Ives. Projects include opening up kitchen layouts, raising ceiling heights and integrating extra glazing to increase natural light throughout residential spaces.
01480 495660 6 Free Church Ln, St. Ives PE27 5AY
on GoogleCambridge
Home and Garden Pro Ject provides design and construction services for residential property extensions across Cambridge. The company builds a range of extension styles to create extra living space for homeowners looking to alter their properties.
on GoogleCambridge
Argyle Design handles house extension planning and architectural services across Cambridge and South Cambridgeshire. The business assists homeowners with obtaining building regulations approval and planning permission while collaborating with local structural engineers and inspectors.
01223 504645 12 Stratfield Cl, Cambridge CB4 3NA
on GoogleCambridge
Exploring the True Cost of House Extensions in Brighton provides project management for loft conversions and home extensions in Brighton. Services cover converting attic space into bedrooms or home offices, alongside managing local planning permissions.
on GoogleOakington, Cambridge
Gawn Associates develops home extension projects in Oakington and Cambridge City, including lightweight garden room additions for Edwardian properties. The firm incorporates large glazing, flush floor levels and custom steelwork to connect interior living areas with outdoor garden spaces.
01223 233888 Unit 1, Oakington Business Park, Dry Drayton Rd, Oakington, Cambridge CB24 3DQ
In Cambridge, single storey, per m² typically costs £2,000 – £2,800. Labour in Cambridgeshire runs 11% above the UK median, which accounts for most of the difference from the same job elsewhere.
These are the firms from Google's results for "house extensions cambridge". They are ranked on Google rating, online presence and other factors.
The figures above are Cambridge ranges. These explain what drives them, so you can read a quote properly.
Per-square-metre prices for single-storey, two-storey, side return and kitchen extensions, costs by size, the fees outside the build price, and planning limits by nation.
The permitted development limits for extensions, lofts, porches and outbuildings in England, where the rights do not apply, what prior approval and a certificate cost, and how Wales, Scotland and NI differ.
When the Party Wall Act applies, which notice to serve and how far ahead, what your neighbour can do, what a surveyor's award costs, and the rules in Scotland and NI.
Under permitted development, three metres for a terrace or semi and four for a detached, doubled to six and eight under the prior approval process. Height, materials and how much garden you cover all carry separate limits, and none of it applies in a conservation area.
If you are excavating within three metres of a neighbour's foundations or building on the boundary, yes. You must serve notice two months before work starts. Skipping it is the most common reason extension projects stall.