The 10 loft conversions from Google's results for London, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleLondon
Clapham Construction Service delivers loft conversions, home extensions, and house renovations across South London. The firm manages building work from initial consultation to final completion to create functional room expansions.
020 3950 7957 Ste 17, 264 Lavender Hill, London SW11 1LJ
on GoogleBarnet
The Loft Converter builds attic conversions, house extensions, and home refurbishments across London, Essex, and Hertfordshire. The business works on residential properties to create additional bedrooms, bathrooms, and living areas.
020 8361 7458 153 High St, Barnet EN5 5SU
on GoogleLondon
Alstruct Ltd provides house extensions, loft conversions and basement conversions for homeowners in Chiswick and West London. Its services also include groundworks, full property renovations and garden landscaping.
020 8080 8240 15B Raven Rd, London E18 1HB
on GooglePopes Dr, London
LCCL Construction is a design and build company converting lofts, extending houses and renovating homes across East London. It works in areas such as Hackney, Walthamstow, Leyton and Bow, where much of the housing is Victorian terraces, and provides architectural design as part of its service.
020 8037 7332 3rd Floor, Hathaway House, Popes Dr, London N3 1QF
on GoogleBuckhurst Hill
Bespoke Lofts constructs attic conversions and home extensions for properties throughout North London. The company handles end-to-end project management, converting disused roof areas into extra living space.
0800 783 9456 188 Queen's Rd, Buckhurst Hill IG9 5BD
on GoogleLondon
Simply Loft carries out home extensions and attic conversions for properties across West London, including Richmond, Acton, and Chiswick. The team manages the full process from initial consultation to structural completion to expand living space.
on GoogleBrompton on Swale, Richmond
Modu Loft constructs modular loft conversions for various property styles, including detached homes, bungalows, and new builds. Operating from Richmond, the firm supplies factory-built roof structures that can be installed on-site using a crane to minimise scaffolding requirements.
0800 195 3855 Units 1, & 2, Bridge Rd, Brompton on Swale, Richmond DL10 7HS
on GoogleLondon
South London Lofts builds roof conversions across South London, including mansard, dormer, L-shaped and hip-to-gable styles. The firm handles architectural drawings, party wall agreements and full fitting of en-suite bathrooms and roof terraces.
020 8673 4114 36-38 Old Devonshire Rd, London SW12 9RB
London
London Loft Conversion constructs house extensions and various attic transformations across London. Works include Velux conversions, hip-to-gable builds, dormers and rear additions designed to enlarge residential properties.
London
Prime Loft specialises in hip-to-gable loft conversions for properties in Ealing and West London. The team focuses particularly on Edwardian semi-detached homes around Ealing Common and Haven Green to unlock additional space.
In London, velux / rooflight typically costs £30,500 – £42,500. Labour in Greater London runs 22% 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 "loft conversion london". They are ranked on Google rating, online presence and other factors.
The figures above are London ranges. These explain what drives them, so you can read a quote properly.
Loft conversion prices by type for 2026, including VAT, with London figures, the fees and extras a builder's quote leaves out, and when planning permission applies.
When a loft conversion needs planning permission in England, the 40 and 50 cubic metre limits for dormers, what a certificate costs, and the rules in Wales, Scotland and Northern Ireland.
What a dormer loft conversion costs in 2026, the dormer types, whether your loft has the height, the planning and building regulations rules in each nation, and how long it takes.
Usually not. Most fall under permitted development if you stay within 40 cubic metres for a terrace or 50 for a semi or detached, do not go above the existing roof ridge, and use materials in keeping. Mansards and anything on a flat or in a conservation area normally do need permission.
Six to eight weeks for a dormer once work starts, plus four to eight weeks beforehand for drawings, structural calculations and building control. Scaffolding usually goes up a week ahead.