The 10 loft conversions from Google's results for Portsmouth, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleDrayton, Portsmouth
Co Pnor Loft Conversions constructs attic extensions and loft conversions for homeowners across the Portsmouth region. The Drayton-based team converts unused roof spaces into functional living areas. Free quotes and examples of completed projects are provided upon request.
07710 291187 15 Tregaron Ave, Drayton, Portsmouth PO6 2JU
on GooglePortsmouth
Fraser Loft Conversions converts attic spaces for clients in Southampton, Hampshire, and the New Forest. The company handles complete design and build projects, creating master bedrooms, en-suite bathrooms, home offices, dressing rooms, and extra family rooms.
on GoogleHavant
Top Notchlofts designs and carries out attic conversions throughout Portsmouth and the surrounding areas. The Havant builder turns underused attic space into functional rooms for local homeowners. Consultation services and free quotes are available before starting any project.
07743 908552 8 Woodington Cl, Havant PO9 5LB
on GoogleHilsea, Portsmouth
Carrying out loft conversions and house extensions, Lofts Portsmouth works across Hampshire, including Chichester, Fareham, Petersfield, and Southampton. The Hilsea company transforms unused roof areas into practical living spaces and handles general building projects from planning to completion.
023 9307 7492 9 Limberline Spur, Hilsea, Portsmouth PO3 5JW
on GoogleCosham, Portsmouth
Walkley Lofts provides design and build conversion services for homeowners in Portsmouth. Located in Cosham, the company constructs Velux and dormer conversions to turn empty roof space into living areas. Initial consultations include free drawings to help plan the structural changes.
07415 884292 216 Hawthorn Cres, Cosham, Portsmouth PO6 2TS
on GoogleDrayton, Portsmouth
Lofts uk handles attic conversions for properties throughout the Portsmouth area. Based in Drayton, the company offers full design and build packages alongside design-only options and client-led construction. Their team conducts initial feasibility surveys and handles architectural drawings and planning submissions.
023 9270 6150 202 Havant Rd, Drayton, Portsmouth PO6 2EH
on GoogleFareham
Apex Loft Conversions provides loft conversion services to homeowners in Fareham.
0800 002 5246 Northern Galleries, Industrial Park, Fort Fareham Industrial Site, 17 Newgate Ln, Fareham PO14 1AH
on GoogleWidley, Waterlooville
D Scott and Sons carries out attic conversions and general home improvement projects across Hampshire. Working from Widley, the company serves homeowners in Portsmouth, Southampton, Havant, Cosham, Petersfield, and Chichester. The team converts empty roof spaces into functional household accommodation.
0800 448 8474 177 Park Ave, Purbrook, Widley, Waterlooville PO7 5EY
Portsmouth
Loft Conversion Portsmouth provides information on planning and building attic conversions in the local area. The blog details designs involving Velux windows, dormer extensions, gable walls, staircases, and en-suite shower rooms.
Portsmouth
Builder Portsmouth offers guidance and construction options for homeowners considering loft conversions across the city. The service outlines options ranging from simple Velux window installations to major structural alterations requiring steel beams.
In Portsmouth, velux / rooflight typically costs £26,000 – £36,500. Labour in Hampshire runs 4% 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 portsmouth". They are ranked on Google rating, online presence and other factors.
The figures above are Portsmouth 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.