24 Best Builders in Uxbridge for 2026

🏗️ 24 businesses · 📍 Uxbridge
✓ Reviewed regularly · ✓ Updated 22 October 2026
Mark Reid
Written by Mark Reid, Trades Editor · Verified 22 October 2026
Hiring a builder in Uxbridge usually means working with the housing stock the area is known for. There are plenty of 1930s semis around Hillingdon, Cowley and Ickenham, many with original bay windows and pebbledash that needs careful handling. Brunel University and the town centre bring flats and conversions, while Harefield and Denham lean towards larger detached houses with long gardens. Side returns, rear extensions and loft conversions are the bread and butter here, and a good number of homes sit close enough to the A40 and M25 that material deliveries are rarely a problem. Parking is another local quirk. Terraced streets near the Metropolitan line station can be tight, so ask any builder how they'll handle skips and van access.

The businesses on this page are drawn from third-party business listings and ranked by public review rating and review count, with a small lift for those showing a working website and phone number. We then read each business's homepage to confirm builders work is what they primarily offer, which keeps unrelated trades off the page. Permanently closed listings are removed automatically. Where you see a Trust Verified badge, that business has additionally passed our full verification covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. Our How We Verify page has the full list. For anyone without the badge, we haven't independently verified them, so those checks are yours to do before you book.

Get at least two or three written quotes, and make sure they're itemised so you can compare like for like. Ask to see public liability insurance and check the cover level suits the size of your job. For anything structural, such as removing a chimney breast or a load-bearing wall, ask who's arranging the structural engineer's calculations and Building Control sign-off. Check whether the firm holds relevant trade accreditation, and ask for addresses of recent jobs you can look at. Agree a payment schedule tied to stages of work rather than paying large sums upfront, and get the start date and expected duration in writing. If planning permission or a party wall agreement is needed with your neighbours, sort that before anyone picks up a spade.
How We Select & Rate The Best Builders in Uxbridge

Businesses are ranked mainly by public review rating and review count from third-party business listings, with a small lift for those that show a working website and phone number. We read each homepage to confirm builders work is what the business primarily offers. Permanently closed listings are removed automatically. Businesses marked Trust Verified have additionally passed our full verification covering trade qualifications, public liability insurance, trading history, customer review history and registered company information. See our How We Verify page for the full list. Other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always do your own checks before hiring.

Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →

Quick Comparison: Builders in Uxbridge

Our Top Picks

1
B&B CONSTRUCTION LTD
Not Verified
★★★★★ 5.0 (51 reviews)
Uxbridge 07540 145024

Families across Uxbridge and the surrounding west London area turn to B&B Construction Ltd for building work on their houses, from structural alterations to extensions and refurbishments. The firm works on domestic properties of the kind found throughout the area, where space is often tight and planning around daily household routine matters.

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2
JP Holdaway Group
Not Verified
★★★★★ 4.8 (34 reviews)
Uxbridge 07596 095014

House extensions, loft conversions and full refurbishments are the core of the work at JP Holdaway Group, a building firm based in Uxbridge. The company takes on domestic projects across the town and neighbouring parts of West London, from structural alterations to finishing work.

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3
RAAZ CONSTRUCTIONS LIMITED
Not Verified
★★★★★ 4.8 (33 reviews)
Uxbridge 0800 133 7331

Extensions, loft conversions and refurbishments on existing family houses make up much of the work for RAAZ Constructions Limited, a building firm based in Uxbridge. The company serves residential clients across the surrounding area, taking on structural alterations and general building projects.

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4
ProFast Build LTD
Not Verified
★★★★★ 5.0 (21 reviews)
Uxbridge 07903 835179

ProFast Build LTD describes itself as a building contractor based in Uxbridge, and its website sets out a scope that runs from extensions and loft conversions to refurbishment and general construction work. The company presents its trade in plain terms, listing the jobs it takes on rather than leaning on slogans.

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5
Insight ProBuild Ltd
Not Verified
★★★★★ 5.0 (20 reviews)
Uxbridge 020 3488 2780

Insight ProBuild Ltd covers the full build cycle, from groundworks and structural alterations through to internal fit-out, for residential and commercial clients in Uxbridge. The company takes on projects of varying scale, coordinating trades across each stage rather than subcontracting individual phases in isolation. That continuity of oversight tends to suit clients undertaking extensions or full refurbishments.

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6
Universal Quality Buildings LTD
Not Verified
★★★★★ 4.6 (26 reviews)
Uxbridge 020 8095 0811

Universal Quality Buildings LTD is a firm of builders in Uxbridge, taking on building work for households and small commercial clients in the town and the surrounding west London area. Its website sets out the projects it undertakes, which makes it straightforward to check whether a job falls within its range before making contact.

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7
Sync Properties - London Construction Contractor
Not Verified
★★★★★ 5.0 (14 reviews)
Uxbridge 07534 451442

Loft conversions, rear and side extensions, and full house refurbishments form the core of the work carried out by Sync Properties, a construction contractor based in Uxbridge. The firm takes on projects across west London and the surrounding areas.

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8
Deko Build LTD
Not Verified
★★★★★ 5.0 (10 reviews)
Uxbridge 07533 493197

Deko Build takes on residential building work around Uxbridge, from extensions and loft conversions to refurbishments of older family houses. The firm is a limited company working across Uxbridge and the surrounding west London boroughs.

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9
Pearson Brothers Builder & Contractor Ltd
Not Verified
★★★★★ 5.0 (10 reviews)
Uxbridge 07721 129070

Pearson Brothers Builder & Contractor Ltd is a building firm based in Uxbridge. The company takes on general building and contracting work for households and small commercial clients in the town and the surrounding area. Customers can find further detail on its website, which sets out the type of projects it undertakes.

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10
Noble Design build & Renovate Ltd
Not Verified
★★★★★ 5.0 (9 reviews)
Uxbridge 07949 968998

Extensions, loft conversions and full-house renovations on existing homes are the core of the work at Noble Design Build & Renovate Ltd, a builders based in Uxbridge. The company handles design and construction under one roof, which suits owners of older properties who want to avoid coordinating separate architects and contractors.

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11
Velonia Interiors Ltd
Not Verified
★★★★★ 5.0 (9 reviews)
Uxbridge 01753 720044

Velonia Interiors Ltd is a building firm based in Uxbridge serving the surrounding area. The company undertakes interior construction and refurbishment work for residential and commercial clients, with projects across the Chiltern and South Bucks corridor.

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12
The loft company
Not Verified
★★★★★ 4.7 (12 reviews)
Uxbridge 0800 566 8424

Loft conversions and rear extensions are the main work of The Loft Company, a building firm serving Uxbridge and the surrounding area of west London. Projects typically involve structural alterations, new staircases and the conversion of unused roof space into bedrooms or home offices.

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13
Q10 Construction Consulting
Not Verified
★★★★★ 5.0 (7 reviews)
Uxbridge 07385 201990

In Uxbridge and the surrounding west London boroughs, Q10 Construction Consulting works as a builder with a consultancy side, advising on project planning alongside the build itself. That combination suits clients who want guidance on scope and sequencing before work begins on site.

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14
Masson Developments
Not Verified
★★★★★ 5.0 (9 reviews)
Uxbridge

Masson Developments is a building firm based in Uxbridge, taking on residential construction work across the surrounding area. The business covers the kind of projects the trade is known for, from structural alterations and extensions to general building repairs.

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15
Home Constructive
Not Verified
★★★★★ 5.0 (6 reviews)
Uxbridge 07891 981021

Families across Uxbridge turn to Home Constructive for building work on their houses, from structural changes to general refurbishment. The firm works on domestic properties, taking on projects that households want to improve rather than move away from.

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16
Pro Squad Builders
Not Verified
★★★★★ 4.6 (9 reviews)
Uxbridge 07534 443034

Pro Squad Builders works on the semi-detached and terraced houses that make up much of the housing around Uxbridge, from extensions and loft conversions to general repairs and refurbishment. The Uxbridge firm takes on jobs that suit a small building crew rather than large developments.

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17
Bhinder Construction Ltd
Not Verified
★★★★★ 5.0 (4 reviews)
Uxbridge 07549 560000

Bhinder Construction Ltd describes itself as a building contractor based in Uxbridge, and lists its work under the general heading of construction rather than a single specialism. The scope it sets out covers the usual range of building projects, from structural work to finishing. The company's listing points to membership of the Federation of Master Builders, a trade body for the sector.

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18
FLAMESTAR LTD
Not Verified
★★★★★ 5.0 (4 reviews)
Uxbridge 0330 133 1221

Loft conversions and rear extensions form the core of the work taken on by Flamestar Ltd, a building firm based in Uxbridge. The company handles structural alterations and general building projects for households across Uxbridge and nearby parts of west London. Projects are quoted and managed directly through the firm, which keeps its online presence simple and its focus on residential construction.

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19
Orbital Basements
Not Verified
★★★★★ 5.0 (4 reviews)
Uxbridge 020 3405 3100

Basement conversions are the core of the work at Orbital Basements, a builder based in Uxbridge. The firm takes on projects that turn unused cellars and below-ground space into habitable rooms, working across the west London area. For households weighing up whether to extend downwards rather than outwards, it offers a focused alternative to a general building contractor.

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20
Homex Construction Ltd
Not Verified
★★★★★ 5.0 (4 reviews)
Uxbridge 07734 011116

Families across Uxbridge and the surrounding west London boroughs turn to Homex Construction Ltd when a house needs more space or a tired layout needs rethinking. The builders take on extensions, loft conversions and general renovation work for private households. The company works on domestic projects of varying size, from single-room updates to larger structural changes.

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21
Heatwave Construction Limited
Not Verified
★★★★☆ 4.4 (7 reviews)
Uxbridge 07889 955041

Families across Uxbridge and the surrounding west London area turn to Heatwave Construction Limited when a house needs extending, altering or repairing. The firm works as a general builder, taking on domestic projects from structural changes to finishing work.

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22
Alexander James Contracts Ltd
Not Verified
★★★★☆ 4.2 (5 reviews)
Uxbridge 020 8961 5555

Building work across Uxbridge and the surrounding west London area is the focus of Alexander James Contracts Ltd, a registered company operating as a general builder. The firm takes on residential construction and renovation projects, from structural alterations to finishing work.

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23
Total Services
Not Verified
★★★★★ 5.0 (1 reviews)
Uxbridge 01895 824777

Total Services is a building firm operating out of Uxbridge, covering construction and general building work across the surrounding area. Their base on the outer edge of the borough gives them close reach into both west London and the neighbouring Home Counties.

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24
Lampco Construction Limited
Not Verified
★★★★☆ 4.3 (3 reviews)
Uxbridge

Lampco Construction Limited describes itself as a building contractor and lists its scope of work on the Lampcogroup website. Based in Uxbridge, the company operates under the builders category, covering construction projects across the local area. Its profile centres on the trade itself rather than any single specialism, so enquirers should confirm the details of a particular job directly with the firm.

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Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. 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 builder cost in Uxbridge?
It depends on the job, the spec and how easy your site is to work on. As a rough guide, a single-storey rear extension typically runs from about £1,800 to £2,800 per square metre, so a 20 square metre kitchen extension might land between £36,000 and £56,000. A loft conversion with a dormer on a 1930s semi often costs £45,000 to £70,000. Smaller jobs such as knocking through a wall with a steel beam usually start around £2,500 to £5,000. Day rates for a general builder tend to be £150 to £250. Getting two or three quotes is normal, and you should expect them to differ.
Do I need planning permission for an extension in Uxbridge?
Often not. Many rear extensions and loft conversions fall under permitted development, but there are limits on depth, height and how close you are to boundaries. Properties in conservation areas, such as parts of Uxbridge town centre and Harefield village, or flats and maisonettes, usually have tighter rules. Check with Hillingdon Council's planning department before you commit. Building Regulations approval is a separate requirement and applies to most structural work regardless of planning.
How long does a typical extension or loft conversion take?
A single-storey rear extension usually takes 10 to 16 weeks on site once groundworks begin, though design, drawings and approvals can add a few months beforehand. A loft conversion tends to take 6 to 10 weeks. Weather matters for foundations and brickwork, and delivery lead times for windows and steel can stretch things. Ask for a written programme with key stages so you can spot slippage early.
Should I pay a deposit upfront?
A small deposit to cover materials ordering is common, but be wary of anything more than around 10 to 15 per cent of the total. Agree stage payments linked to completed work, for example after foundations, once the roof is watertight and at completion. Keep a final payment back until you're happy and any snagging is done. Get every payment recorded in the written contract.
What happens if I find damp, asbestos or an unexpected problem mid-build?
Older Uxbridge homes can throw up surprises, from failed damp-proof courses to asbestos in garage roofs or artex ceilings, and sometimes weak drains or shallow foundations on clay soil. Ask each builder how they price unforeseen work. A fair contract sets out a provisional sum or day rate for extras and requires written agreement before anything is added to the bill. Asbestos should only be removed by a licensed contractor where the material requires it.
How do I check a builder is reliable before hiring?
Start by asking for proof of public liability insurance and check the policy is current and covers the value of your job. Ask whether they hold relevant trade accreditation and confirm it with the issuing body directly. Look up the company on Companies House if they trade as a limited company, and read recent online reviews, paying attention to how they handled problems. Ask for two or three references from jobs similar to yours and, if possible, visit one. Get a written contract covering scope, price, payment stages, start date and how variations are handled. If a builder is reluctant to provide any of this, move on.