The 10 extension builders from Google's results for Derby, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleLittleover, Derby
Eley Projects delivers domestic property extensions across Littleover and the wider Derby region. The company handles building work designed to modernise existing properties, expand living layouts, and adapt homes for growing space requirements.
01332 314164 15 Richmond Ave, Littleover, Derby DE23 1DL
on GoogleBelfast
Building front, rear, and side return home extensions is the primary focus of House Extensions Derby. Based in Belfast, the company also installs energy-rated doors and windows to help homeowners expand their ground-floor layouts.
028 9002 2656 Work West, 301 Glen Rd, Belfast BT11 8BU
on GoogleNottingham Rd, Nottingham
Extensions for residential properties are designed and constructed by House Extensions Nottinghamshire across Derby and the surrounding areas. The company builds customised additions to create extra space for kitchens, dining rooms and living spaces.
0115 922 6000 Basfords, Nottingham Rd, Nottingham NG9 6DP
on GoogleDerby
Derby Shire Specialists Group delivers Velux, dormer, hip-to-gable, and bungalow attic conversions across Derbyshire and Derby. The business manages build projects directly to create extra living areas for residential properties.
on GoogleBroomfield Estate, Derby
Single Storey Extension Design Derby develops plans for single-storey, two-storey, and loft conversions across Derby and Nottingham. Architectural services cover residential homes, barn conversions, and commercial structures from its Broomfield Estate office.
01332 830313 2 Broomfield Cottages, Broomfield Estate, Derby DE7 6DN
on GoogleDerby
ADN Construction delivers house extensions, garage conversions, and loft conversions for properties in Derby. The team also undertakes complete house renovations, timber-framed builds, and barn conversions to enlarge and update local homes.
Derby
Derby House Extensions undertakes building and roofing projects across the Derby area. Its work includes rear, side return, wrap-around, two-storey, and kitchen extensions, as well as loft and garage conversions. The business also provides pitched and flat roofing services, including fibreglass and felt options.
Derby
Loft Conversion Architects in Derby produces architectural designs and planning applications for house extensions and loft conversions. The firm creates plans for properties ranging from period terraces to modern houses.
Derby
Conversion Company converts lofts and garages into bedrooms, offices, studies, and playrooms across Derby and Nottingham. The business also fits custom kitchens and manages structural updates to expand living spaces.
Derby
Sketch Pad produces extension plans for residential clients in Derby seeking additional kitchen space, home offices, or extra bedrooms. Services include advising on local planning requirements, timelines, and architectural layouts before building begins.
In Derby, single storey, per m² typically costs £1,700 – £2,300. Labour in Derbyshire runs 8% below 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 derby". They are ranked on Google rating, online presence and other factors.
The figures above are Derby 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.