8 Spur Road, Cosham, Portsmouth, Hampshire PO6 3EB
Building, extensions and refurbishment
Quote on request.
Portsmouth · Building & conversions
Builders in Portsmouth
Phone numbers for builders covering Portsmouth — extensions, loft conversions and refurbishment. Open a profile and call the business yourself. This site does not send your job.
Extensions and loft work need more than a day rate. The renovation budget tool can sit beside a local quote. Cosham and Fareham appear on Portsmouth cards. If the job is on Portsea Island, ask whether their time includes the traffic at the creek or assumes they already live south of it. Profiles show a name, the area they cover and a phone number. Public qualifications such as Gas Safe or NICEIC appear only when they are on the profile. Read the cost notes for a sourced national range; a figure on a card is not a quote.
198 London Road, North End, Portsmouth PO2 9JE
Building, extensions and refurbishment
Quote on request.
Unit E2, Standard Way, Fareham PO16 8XT
Building, extensions and refurbishment
Quote on request.
Kingsmere House, Fitzherbert Road, Portsmouth PO6 1RU
Building, extensions and refurbishment
Quote on request.
C/O Voila Accounting, Castle Court, 1 Castle Street, Portchester, Fareham PO16 9QD
Building, extensions and refurbishment
Quote on request.
Unit 5 Oyster Estate, Jackson Close, Farlington, Portsmouth, Hampshire PO6 1QN
Building, extensions and refurbishment
Quote on request.
227a West Street, Fareham PO16 0HZ
Building, extensions and refurbishment
Quote on request.
2.2 Central Point, Kirpal Road, Portsmouth PO3 6FH
Building, extensions and refurbishment
Quote on request.
C/O Voila Accounting, Castle Court, 1 Castle Street, Portchester, Fareham PO16 9QD
Building, extensions and refurbishment
Quote on request.
No businesses match those extra filters. Clear 24-hour or qualification to widen the list.
Typical building & conversions costs
Checkatrade’s house-extension guide, per-square-metre table last updated March 2025, is a national sense-check for shell versus finished work. It is not a local tariff. Rear extensions have to come out through the house; alleys are rare. Ask for that route in the price, and for fixings that suit salt air if the extension faces open water.
A local rule to check in Portsmouth
Many extensions, loft conversions and structural openings need building control, and some need planning. A listing is not an approval and not a party-wall agreement.
Questions before you phone
How do I find builders in Portsmouth on this list?
Southsea terraces face the Solent on a flat island with one main road in. Fratton roofs are low and close together. This is not Southampton's inland 1930s stock. Names, service areas and phone numbers sit on the cards. Open a profile and call the firm yourself. Cosham and Fareham appear on Portsmouth cards. If the job is on Portsea Island, ask whether their time includes the traffic at the creek or assumes they already live south of it.
Does this page send my job to a Portsmouth building & conversions firm?
No. You place the call. This site does not email or text anyone on your behalf.
What should the written price say for building & conversions in Portsmouth?
Materials through the house. Salt-suitable fixings if it faces the water.
What is easy to miss before booking in Portsmouth?
Salt on fixings and a terrace with no side access are the local constraints. A quote that mentions neither has been written for a mainland semi.
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