The 10 loft conversions from Google's results for Southampton, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleSouthampton
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 GoogleAldermaston, Reading
Loft Plan carries out attic conversions across Southampton and the surrounding Hampshire region. The company adapts terrace and detached properties in areas such as Bitterne and Highfield, converting unused roof spaces into functional new living environments.
01256 881041 1, Calleva Park, Aldermaston, Reading RG7 8HA
on GoogleSouthampton
Apex Lofts and Carpentry provides loft conversion services across the Southampton SO14 and SO15 postcodes. It transforms empty attic areas into functional living quarters such as extra bedrooms, home offices, children's playrooms, or home gyms.
on GoogleEastleigh
MJH Builders delivers general construction services in Eastleigh and the surrounding areas. Its scope of work includes loft conversions, home extensions, kitchen and bathroom installations, structural repairs, and commercial building projects.
07891 638636 66 Underwood Rd, Eastleigh SO50 6FW
on GoogleHordle, Lymington
Spartan Lofts provides loft conversion services for property owners in Lymington and Southampton.
01590 230353 63 Pinewood Rd, Hordle, Lymington SO41 0GN
on GoogleWest End, Southampton
ASC Lofts carries out loft conversions, garage conversions, and house extensions across Hampshire. Based in Southampton, its work also includes kitchen and bathroom replacements, Velux window installations, dormers, garden rooms, and general carpentry.
023 8212 2898 Baltic Rd, West End, Southampton SO30 3DZ
on GoogleSouthampton
Rob Watkins provides building contractor services throughout Southampton, covering house extensions, loft conversions, and new build projects. The team handles full architectural planning, design, and project management for residential renovations.
on GooglePoole, Bournemouth
World of Lofts Ltd designs and builds attic conversions for homeowners in Dorset, Southampton, and Winchester. The business conducts site visits, delivers architectural designs, handles planning requirements, and provides options ranging from DIY packages to full builds.
01202 761199 66 Branksome Hill Rd, Poole, Bournemouth BH4 9LG
Southampton
Top Box Lofts supplies loft conversions and structural carpentry throughout Southampton and Hampshire. The team manages projects from initial design through to completion, carrying out dormer, Velux, and hip-to-gable conversions for residential properties.
Southampton
Top Notch Construction handles loft conversions and home extensions for domestic clients in Southampton and Winchester. The firm manages projects from initial planning to final completion, constructing extra bedrooms and home studies.
In Southampton, velux / rooflight typically costs £26,500 – £37,000. Labour in Hampshire runs 5% 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 southampton". They are ranked on Google rating, online presence and other factors.
The figures above are Southampton 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.