21 Best Builders in Portsmouth for 2026

🏗️ 21 businesses · 📍 Portsmouth
✓ Verified Google reviews · ✓ Reviewed regularly · ✓ Updated 29 May 2026
Mark Reid
Written by Mark Reid, Trades Editor · Verified 29 May 2026
Portsmouth is a city that keeps builders genuinely busy. The housing stock here is unusually varied: you've got Victorian terraces packed tightly across Southsea and Milton, post-war semis throughout Paulsgrove and Cosham, Georgian townhouses on Old Portsmouth's narrow streets, and modern flats spreading along the waterfront. That mix means builders working in the city need to be comfortable switching between traditional lime-mortar brickwork and contemporary block construction, often on projects just a few streets apart. The island geography matters too. Portsea Island has limited land, so extensions, loft conversions, and garage conversions are far more common here than large new-build plots. Ground conditions vary considerably, with made-up ground and high water tables in low-lying areas like Fratton and parts of Landport requiring additional care during groundworks and foundation design. If you're bringing a builder in for anything structural, that local knowledge isn't a nice-to-have.

The builders listed on this page are drawn from public third-party business listings and ranked by review rating and review count, with a small lift applied to businesses that show a working website and a contactable phone number. Before any business appears here, we check their homepage to confirm that building work is what they primarily offer, which is how unrelated trades get filtered out. Any listing flagged as permanently closed is removed automatically. You'll notice that some businesses carry a Trust Verified badge. That badge is awarded individually and means the business has gone through our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. You can find the complete list of what that covers on our How We Verify page. Businesses without that badge have not been independently verified by us, and appearing on this page is not an endorsement of their work.

Before you book any builder, ask for a written, itemised quote rather than a rough verbal figure. For work in Portsmouth's older housing stock, make sure they're familiar with the materials involved, solid brick walls without cavity insulation, for example, behave very differently to modern cavity construction. Always request evidence of current public liability insurance before work starts, and check whether they hold any relevant trade memberships or accreditations such as Federation of Master Builders membership. For projects involving structural alterations or extensions, you'll need Building Regulations approval, and it's worth confirming who will manage that process and who'll be responsible for the completion certificate. Getting at least three quotes is sensible. Prices for a single-storey rear extension in Portsmouth typically run from around £25,000 to £45,000 depending on specification and finish, so the spread between quotes can be substantial.
How We Select & Rate The Best Builders in Portsmouth

Rankings on this page are driven by public review rating and review count from third-party business listings, with a small lift for businesses showing a working website and phone number. We check each business's homepage to confirm that building work is what they primarily offer, keeping unrelated trades off the page. Permanently-closed listings are removed automatically. Businesses carrying a Trust Verified badge have additionally passed our full verification covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. See our How We Verify page for the full details. All other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always carry out your own checks before hiring.

Positions 1–5 (Recommended and Featured) may be paid placements. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →

Quick Comparison — Builders in Portsmouth

# Business Rating Reviews Phone
1 CDM CONTRACTORS LTD Recommended ⭐ 5.0 149 +44 23 9323 3110 View →
2 MEA Projects Featured ⭐ 4.9 52 +44 23 9378 8899 View →
3 Restore and revive Featured ⭐ 5.0 37 +44 7771 876319 View →
4 D & H Carpentry and Construction LTD Featured ⭐ 4.9 35 +44 23 9355 2695 View →
5 Brick Slip Facades (UK) Ltd Featured ⭐ 5.0 21 +44 7411 653365 View →
6 Clameg Design & Build Ltd ⭐ 5.0 20 +44 23 9266 9288 View →
7 BMC LOFT CONVERSION SPECIALISTS ⭐ 4.8 22 +44 23 9307 7492 View →
8 Form Construction ⭐ 5.0 11 +44 23 9400 1002 View →
9 M2 BUILDERS ⭐ 5.0 6 +44 7802 250348 View →
10 Morspace Construction LTD ⭐ 5.0 6 +44 7793 490767 View →
11 Lifetime Construction LTD ⭐ 4.8 8 +44 23 9281 2308 View →
12 Hartts Construction ⭐ 5.0 5 +44 23 9381 2330 View →
13 Adson Construction ⭐ 5.0 7 View →
14 Evolve Design Build ⭐ 5.0 4 +44 7989 481389 View →
15 Limewood Builders ⭐ 5.0 4 +44 7710 929290 View →
16 Woodpecker Carpentry and Build Ltd ⭐ 5.0 4 +44 7877 228083 View →
17 M & L Page Construction Ltd. ⭐ 5.0 4 +44 23 9236 2066 View →
18 Vxo Vehicle Crossings Ltd ⭐ 4.3 6 +44 7843 358491 View →
19 Vale Southern Construction Ltd ⭐ 4.2 5 +44 23 9265 3600 View →
20 PMC Construction & Development Services Ltd ⭐ 4.0 5 +44 23 9269 6025 View →
21 T Coleborn & Son Ltd ⭐ 4.0 4 +44 23 9282 6662 View →

Our Top Picks

6
Clameg Design & Build Ltd
Not Verified
5.0 (20 reviews)
Portsmouth +44 23 9266 9288

Clameg Design & Build Ltd provides comprehensive building services to Portsmouth and the surrounding PO3 area from their base at Challenge Enterprise Centre. The company has earned a perfect 5-star rating from 20 verified customer reviews, reflecting their consistent approach to construction projects. Their established presence in Portsmouth positions them well to serve local residential and commercial building requirements.

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7
BMC LOFT CONVERSION SPECIALISTS
Not Verified
4.8 (22 reviews)
Portsmouth +44 23 9307 7492

BMC Loft Conversion Specialists provides professional loft conversion services to homeowners across Portsmouth and surrounding areas. The company transforms unused loft spaces into functional living areas, helping clients maximise their property's potential. With a strong 4.8 out of 5 star rating from 22 verified customer reviews, they have established a solid reputation for quality workmanship in the PO3 area and beyond.

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8
Form Construction
Not Verified
5.0 (11 reviews)
Portsmouth +44 23 9400 1002

Form Construction provides building services across Portsmouth and the surrounding areas from their base on Warren Avenue Industrial Estate in Southsea. The company has earned a perfect 5-star rating from 11 verified customer reviews on Google, reflecting their commitment to quality workmanship. They serve both residential and commercial clients throughout the Portsmouth area.

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9
M2 BUILDERS
Not Verified
5.0 (6 reviews)
Portsmouth +44 7802 250348

M2 Builders provides construction and building services to Portsmouth and the surrounding areas, operating from their base on London Road in Hilsea. The company has earned a perfect 5-star rating from 6 verified customer reviews, reflecting their commitment to quality workmanship. Serving the PO2 postcode area and beyond, they handle various building projects for residential and commercial clients.

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10
Morspace Construction LTD
Not Verified
5.0 (6 reviews)
Portsmouth +44 7793 490767

Morspace Construction LTD operates as a building company serving Portsmouth and surrounding areas from their Cosham base. The company maintains a 5-star Google rating from 6 verified customer reviews, reflecting their commitment to quality construction services. Clients can find more information about their building projects and services through their website at morspace.net.

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11
Lifetime Construction LTD
Not Verified
4.8 (8 reviews)
Portsmouth +44 23 9281 2308

Lifetime Construction LTD provides building services from their base on Garnier Street in Portsmouth city centre. The company has earned a 4.8 out of 5 star rating from 8 verified customer reviews on Google. They serve the Portsmouth area with construction work for residential and commercial clients.

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12
Hartts Construction
Not Verified
5.0 (5 reviews)
Portsmouth +44 23 9381 2330

Hartts Construction is a building company based in Hilsea, Portsmouth, providing construction services across the PO3 area. The company has earned a perfect 5/5 star rating from 5 verified customer reviews on Google. They operate from Culverin Square and maintain a professional web presence at hartts.co.uk.

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13
Adson Construction
Not Verified
5.0 (7 reviews)
Portsmouth

Adson Construction provides professional building services to clients across Portsmouth from their base at Fairways Business Centre. The company has earned a perfect 5-star rating from 7 verified customer reviews, reflecting their commitment to quality workmanship and customer satisfaction. Their central PO3 location enables them to serve the wider Portsmouth area efficiently.

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14
Evolve Design Build
Not Verified
5.0 (4 reviews)
Portsmouth +44 7989 481389

Evolve Design Build is a Portsmouth-based construction company serving the local area from their Southsea location on Worsley Street. The firm has earned a perfect 5-star rating from 4 verified customer reviews on Google. They provide building services across the Portsmouth and Southsea areas, combining design and construction expertise for residential and commercial projects.

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15
Limewood Builders
Not Verified
5.0 (4 reviews)
Portsmouth +44 7710 929290

Limewood Builders provides construction and building services to Portsmouth and surrounding areas from their Hilsea base. The company maintains a perfect 5-star rating from 4 verified customer reviews on Google. Based on London Road in the PO2 area, they serve local clients with professional building work.

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16
Woodpecker Carpentry and Build Ltd
Not Verified
5.0 (4 reviews)
Portsmouth +44 7877 228083

Woodpecker Carpentry and Build Ltd provides building and carpentry services to Portsmouth and surrounding areas from their base on Burrfields Road. The company has earned a perfect 5-star rating from 4 verified customer reviews on Google. Their services combine traditional carpentry skills with general building work for residential and commercial clients in the PO3 area.

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17
M & L Page Construction Ltd.
Not Verified
5.0 (4 reviews)
Portsmouth +44 23 9236 2066

M & L Page Construction Ltd. provides building services to Portsmouth and surrounding areas from their Stanley Avenue base. The company has earned a 5-star Google rating from 4 verified customer reviews, reflecting their commitment to quality workmanship and customer satisfaction.

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18
Vxo Vehicle Crossings Ltd
Not Verified
4.3 (6 reviews)
Portsmouth +44 7843 358491

Vxo Vehicle Crossings Ltd is a Portsmouth builder specialising in dropped kerbs and vehicle crossings. Operating from PO6 3NJ, the company focuses on a single trade rather than a broad building offer, which suits homeowners seeking a specialist for driveway access work. A Google rating of 4.3 from six reviews gives an early indication of consistent workmanship.

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19
Vale Southern Construction Ltd
Not Verified
4.2 (5 reviews)
Portsmouth +44 23 9265 3600

Vale Southern Construction Ltd provides building services throughout Portsmouth from their base in Hilsea. The company maintains a 4.2-star rating from 5 verified customer reviews on Google. They operate from Warren House on Gunstore Road, offering construction solutions to residential and commercial clients in the PO3 area and surrounding Portsmouth districts.

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20
PMC Construction & Development Services Ltd
Not Verified
4.0 (5 reviews)
Portsmouth +44 23 9269 6025

PMC Construction & Development Services Ltd provides building services from their Cosham base, serving Portsmouth and surrounding areas. The company has earned a 4-star rating from 5 verified customer reviews on Google. Their High Street location makes them easily accessible for local construction and development projects throughout the PO6 area.

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21
T Coleborn & Son Ltd
Not Verified
4.0 (4 reviews)
Portsmouth +44 23 9282 6662

T Coleborn & Son Ltd provides building services to Portsmouth and the surrounding areas from their base on Kirpal Road. The family-run construction company has earned a 4-star rating from 4 verified customer reviews on Google. They serve the PO3 postcode area and wider Portsmouth region with their building expertise.

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Transparency notice: Recommended (#1) and Featured (positions 2-5) listings may be paid placements, so a business's fee affects whether and where it appears in those positions. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →

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Frequently Asked Questions

How much does a builders cost in Portsmouth?
Day rates for skilled builders typically range from £200-350 depending on the trade and complexity. Small jobs like fitting a door might cost £150-300, while kitchen renovations start around £8,000-15,000. Single-storey extensions often run £15,000-25,000 plus VAT. Prices vary significantly based on materials, access issues, and whether structural work is needed. Always get at least three detailed quotes to compare.
Do I need planning permission for building work in Portsmouth?
Many projects fall under permitted development rights, including single-storey rear extensions up to 6 metres for terraced houses. However, Portsmouth has several conservation areas where stricter rules apply, particularly in Old Portsmouth and parts of Southsea. Your builder should know local requirements, but you can check with Portsmouth City Council's planning department. Always confirm permissions before work starts.
What's the typical timeline for an extension in Portsmouth?
Single-storey extensions usually take 8-12 weeks from groundwork to completion, though this depends on size and complexity. Planning applications take 8 weeks if required, and Building Control approval adds time. Weather delays are common given Portsmouth's coastal exposure. Factor in potential access issues in narrow streets and allow extra time if you're in a conservation area.
Should I use local Portsmouth builders or larger companies?
Local builders often understand Portsmouth's specific challenges better, from dealing with clay soil conditions to navigating narrow access roads. They're typically more flexible with smaller jobs and know local suppliers. Larger companies might offer more comprehensive warranties and project management. Check recent local references regardless of company size.
What building problems are common in Portsmouth properties?
Damp issues are frequent due to the coastal location, particularly in older properties with solid walls. Victorian terraces often have subsidence concerns related to clay soil. Many properties need roof repairs due to salt air exposure, and single-glazed sash windows are common. Electrical systems in older houses frequently need updating to current standards.
How do I verify a builder's credentials in Portsmouth?
Check their business registration on Companies House and confirm public liability insurance is current and covers at least £2 million. Ask for recent local references and actually ring them. Look for membership of trade bodies like the Federation of Master Builders. Visit current job sites if possible, and verify any Gas Safe or electrical certifications through official registers.