The 10 extension builders from Google's results for Brighton, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleGoring-by-Sea, Worthing
FRESH Architects designs house renovations, two-storey rear extensions and loft conversions across Brighton and Hove. Projects feature open-plan living layouts, master suites with ensuites, and internal property reconfigurations for residential clients.
07703 682107 2 Sunny Cl, Goring-by-Sea, Worthing BN12 4BD
on GoogleBrighton and Hove, Brighton
House extensions, garage conversions, structural alterations, and bathroom renovations are completed by The Patcham Building Company. Based in Brighton and Hove, the firm provides domestic construction across East Sussex. It also fits kitchens and carries out general property updates.
01273 087300 St Augustine’s arts and events centre, Stanford Ave, Brighton and Hove, Brighton BN1 6EA
on GoogleBrighton and Hove, Brighton
Blount Construction provides loft conversions, house extensions, flat conversions, and full home renovations in Brighton and Sussex. Its tradespeople perform structural alterations, roofing, masonry, joinery, and bathroom fittings. The firm also assists with design and planning for domestic projects.
01273 950245 20 Downland Rd, Brighton and Hove, Brighton BN2 6DJ
on GoogleBrighton and Hove, Brighton
Create carries out loft conversions, house extensions and full property renovations in Brighton and Hove. The building firm also installs new kitchens and bathrooms alongside general residential refurbishments across the region.
07805 296820 1 Cowley Dr, Brighton and Hove, Brighton BN2 6WA
on GoogleDenton Island, Newhaven
STAAC installs bathrooms, performs structural works, and converts lofts and garages across Denton Island and Newhaven. The company handles project management, building control applications, 3D modelling, and sound or air testing. Its team also conducts pre-purchase feasibility studies and structural site visits.
01323 325354 5A, Enterprise Centre, Denton Island, Newhaven BN9 9BA
on GoogleLisburn
Knox Clayton delivers architectural services for private homes and house extensions in Lisburn and Belfast. The practice designs bright, open-plan living environments and larger residential layouts.
028 9267 4312 2A Wallace Ave, Lisburn BT27 4AA
on GoogleBrighton and Hove, Brighton
HAPA Architects designs house extensions and internal reconfigurations across Brighton, Hove and Sussex. The practice works on Victorian terraces, family houses and countryside properties to enlarge and redevelop domestic spaces.
01273 025989 11, The, Old Steine, Kemptown, Brighton and Hove, Brighton BN1 1EJ
on GoogleBrighton
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 GoogleLondon
Our guide to loft conversion in North London provides planning, design, and building guidance for loft conversions and house extensions across South East and South West London. It covers dormer, Velux, rear, and wraparound structural projects.
020 8068 4811 5th Floor, 241 Southwark Bridge Rd, London SE1 6FP
Brighton
Sound House constructs eaves and dormer loft conversions, kitchen installations and bathroom fittings in Brighton and Hove. The team also carries out house extensions, general building works and period property restorations.
In Brighton, single storey, per m² typically costs £2,000 – £2,800. Labour in East Sussex runs 10% 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 brighton". They are ranked on Google rating, online presence and other factors.
The figures above are Brighton 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.