House Extensions
Single storey, double storey, rear and wrap-around extensions across Altrincham.
Learn more →Builders Altrincham
KJL Builders are local, fully insured builders covering Altrincham and the surrounding areas — house extensions, knock throughs, garage conversions, porches, bricklaying, garden walls, kitchen renovations, loft conversions and commercial building work, all professionally managed from first quote to final finish.
WA14
WA15
Request Your Free Altrincham Quote
Fill in the form below with a few details about your Altrincham project and we'll get back to you with a free, no-obligation quote.
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Local Builders Who Know Altrincham
Altrincham has a wide mix of property styles, from period terraces and semis to inter-war housing, post-war estates and newer developments — and each comes with its own considerations when extending, converting or renovating. Having worked across Altrincham and the surrounding areas, we understand the construction challenges that different types of properties can present and what's required to keep projects running smoothly through building control and achieve sign-off from Trafford Council without unnecessary delays.
Fully Insured
Complete protection for your property and our team throughout the work.
Local Altrincham Knowledge
Experience with the area's period terraces, semis, post-war estates and newer developments.
All Altrincham Postcodes Covered
From the centre of Altrincham out to Broadheath, Bowdon, Hale and beyond.
Transparent Pricing
Clear, fair quotes with no hidden costs before any work begins.
Building Control & Regulations
We liaise directly with Trafford Council building control, architects and structural engineers, and can source these professionals for you.
Pay As You Build
We don't take large payments up front — payments are staged against completed, inspected work.
Our Services in Altrincham
Every building service we offer, available right across Altrincham.
Knock Through
Structural wall removal and steel beam installation for open-plan Altrincham homes.
Learn more →Garage Conversions
Turn your Altrincham garage into an office, bedroom, gym or extra living space.
Learn more →Porches
Open, enclosed and gable-fronted porches that suit the area's terraces and semis.
Learn more →Bricklaying Contractors
New brickwork, blockwork, repairs and repointing matched to the local period brick.
Learn more →Garden Walls
Boundary walls, retaining walls and brick garden walls built to last.
Learn more →Commercial Builders
Brickwork, steel installation, dry lining, plastering and painting for Altrincham businesses.
Learn more →Kitchen Fitters
Full kitchen renovations and fitted installations for homes across Altrincham.
Learn more →Loft Conversions
Dormer, Velux and hip-to-gable loft conversions, loft boarding and loft bedrooms, offices and ensuites for homes across Altrincham.
Learn more →Altrincham Postcodes & Areas We Cover
We cover every Altrincham postcode district — from the centre out to the surrounding areas. Here's a full breakdown of the areas within each postcode.
| Postcode | Areas Covered |
|---|---|
| WA14 | Altrincham (centre and west), Bowdon, Broadheath, Dunham Town, Timperley, Dunham Massey, Little Bollington |
| WA15 | Altrincham (east), Ashley, Hale, Hale Barns, Timperley, Ringway |
Don't see your exact street listed? We cover the whole of Altrincham — get in touch and we'll confirm we cover your postcode.
Cost of Building Work in Altrincham
Costs vary by property type and the scale of work — a period terrace or a semi in Altrincham will differ from a new-build. Here's a rough guide to help with budgeting; we recommend a site visit for an accurate quote.
£1,500 – £10,000
Smaller Projects
Porches, garden walls, bricklaying repairs and small garage conversions.
£10,000 – £30,000
Mid-Size Projects
Knock throughs, full garage conversions and single storey extensions.
£30,000+
Larger Projects
Double storey extensions, wrap-around extensions and commercial fit-outs.
For an accurate estimate, we recommend requesting a personalised quote based on your Altrincham property and project requirements. Get in touch →
Also Covering the Areas Around Altrincham
As well as Altrincham itself, we cover the surrounding towns and areas, including:
Our Process for Altrincham Projects
A clear, structured process to keep your Altrincham project on track from start to finish.
Initial Consultation
We discuss your ideas, goals and budget for your Altrincham property.
Site Visit
We visit your property to assess the work and confirm exactly what's needed.
Detailed Quotation
A clear, transparent breakdown of costs, materials, labour and timelines.
Building Control & Permissions
We liaise with Trafford Council building control and, where needed, architects and structural engineers.
Construction
Our experienced team carries out the work to a high standard, keeping you updated throughout.
Final Inspection & Handover
We walk through the finished project with you to make sure everything meets your expectations.
What Our Altrincham Clients Say
Feedback from Altrincham homeowners and businesses who chose KJL Builders.
★★★★★
KJL Builders extended our terrace in Altrincham and matched the original brickwork perfectly. Professional from the first quote to the final walkthrough.
★★★★★
We had a knock through done on our semi in Altrincham — tidy, reliable and the steel beam installation was handled without any fuss.
★★★★★
Converted our garage in Altrincham into a home office. Great communication throughout and finished on schedule.
Altrincham Builders FAQs
Useful information before you start planning a building project in Altrincham.
Ask us a questionWhat areas of Altrincham do you cover?
We cover every Altrincham postcode from WA14 to WA15 — including Broadheath, Bowdon, Hale and Timperley — plus the surrounding area.
Do you work on properties in conservation areas or listed buildings?
Yes. Altrincham and the surrounding area include conservation areas and listed properties, particularly in the older parts of town. We're experienced working within these constraints and can advise on what's required before work starts.
Can you help with planning permission and building control?
Yes, we liaise directly with Trafford Council's building control team and, where required, architects and structural engineers — and can source these professionals for you if you don't already have your own.
Do you work on properties in the centre of Altrincham as well as the surrounding areas?
Yes, alongside period terraces and semis across the surrounding areas, we also carry out work on properties in and around the centre of Altrincham, subject to any building management rules that apply.
What services do you offer in Altrincham?
House extensions, knock throughs and steel beam installation, garage conversions, porches, bricklaying, garden walls, kitchen renovations, loft conversions and commercial building work — all available across every area of Altrincham.
How much does building work cost in Altrincham?
Costs vary widely depending on the project and property type, from around £1,500 for smaller jobs to £30,000+ for larger extensions and commercial work. Contact us for a personalised quote based on your property.
When do I need to pay?
We don't take large payments up front. Payments are staged against completed, inspected work, and for structural elements we don't take payment until the building inspector has signed them off.
Looking for a builder in Altrincham?
Tell KJL Builders what you have planned and arrange a free quote anywhere in Altrincham.