House Extensions
Single storey, double storey, rear and wrap-around extensions across Manchester.
Learn more →KJL Builders are local, fully insured builders covering every inner Manchester postcode from M1 to M40 — house extensions, knock throughs, garage conversions, porches, bricklaying, garden walls and commercial building work, all professionally managed from first quote to final finish.
Manchester is a mix of Victorian terraces, Edwardian semis, inter-war housing and new-build city centre apartments — each with its own quirks when it comes to extending, converting or altering. We've worked across the city long enough to know what each type of property needs, and how to get building control sign-off from Manchester City Council without unnecessary delays.

Complete protection for your property and our team throughout the work.
Experience with Manchester's period terraces, semis and city centre apartment buildings.
From the city centre out to Wythenshawe, Didsbury, Chorlton and beyond.
Clear, fair quotes with no hidden costs before any work begins.
We liaise directly with Manchester City Council building control, architects and structural engineers, and can source these professionals for you.
We don't take large payments up front — payments are staged against completed, inspected work.
Every building service we offer, available right across Manchester.
House Extensions
Single storey, double storey, rear and wrap-around extensions across Manchester.
Learn more →Knock Through
Structural wall removal and steel beam installation for open-plan Manchester homes.
Learn more →Garage Conversions
Turn your Manchester garage into an office, bedroom, gym or extra living space.
Learn more →Porches
Open, enclosed and gable-fronted porches that suit Manchester's terraces and semis.
Learn more →Bricklaying Contractors
New brickwork, blockwork, repairs and repointing matched to Manchester's 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 Manchester businesses.
Learn more →Kitchen Fitters
Full kitchen renovations and fitted installations for homes across Manchester.
Learn more →Loft Conversions
Dormer, Velux and hip-to-gable loft conversions, loft boarding and loft bedrooms, offices and ensuites for homes across Manchester.
Learn more →We cover every inner Manchester postcode district — from the city centre out to the inner suburbs. Here's a full breakdown of the areas within each postcode.
| Postcode | Areas Covered |
|---|---|
| M1 | City Centre, Piccadilly, Market Street, Gay Village |
| M2 | City Centre, Deansgate |
| M3 | City Centre, Castlefield, Spinningfields |
| M4 | Ancoats, Northern Quarter, Shudehill, Strangeways |
| M8 | Cheetham Hill, Crumpsall |
| M9 | Harpurhey, Blackley |
| M11 | Clayton, Openshaw, Beswick |
| M12 | Ardwick, Chorlton-on-Medlock, Longsight |
| M13 | Rusholme, Victoria Park, Longsight, Ardwick |
| M14 | Fallowfield, Moss Side, Ladybarn, Rusholme |
| M15 | Hulme, Manchester Science Park |
| M16 | Whalley Range, Moss Side, Firswood |
| M18 | Gorton, Abbey Hey |
| M19 | Levenshulme, Burnage |
| M20 | Withington, Didsbury |
| M21 | Chorlton-cum-Hardy, Barlow Moor |
| M22 | Wythenshawe, Northenden, Sharston |
| M23 | Baguley, Brooklands ( Wythenshawe) |
| M40 | Collyhurst, Miles Platting, Moston, Newton Heath |
Don't see your exact street listed? We cover the whole of Manchester — get in touch and we'll confirm we cover your postcode.
Costs vary by property type and the scale of work — a Victorian terrace in Longsight or a semi in Didsbury will differ from a new-build in the city centre. Here's a rough guide to help with budgeting; we recommend a site visit for an accurate quote.
Porches, garden walls, bricklaying repairs and small garage conversions.
Knock throughs, full garage conversions and single storey extensions.
Double storey extensions, wrap-around extensions and commercial fit-outs.
For an accurate estimate, we recommend requesting a personalised quote based on your Manchester property and project requirements. Get in touch →
As well as every inner Manchester postcode, we cover the wider Greater Manchester area, including:
A clear, structured process to keep your Manchester project on track from start to finish.
We discuss your ideas, goals and budget for your Manchester property.
We visit your property to assess the work and confirm exactly what's needed.
A clear, transparent breakdown of costs, materials, labour and timelines.
We liaise with Manchester City Council building control and, where needed, architects and structural engineers.
Our experienced team carries out the work to a high standard, keeping you updated throughout.
We walk through the finished project with you to make sure everything meets your expectations.
Feedback from Manchester homeowners and businesses who chose KJL Builders.
KJL Builders extended our terrace in Chorlton 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 Didsbury — tidy, reliable and the steel beam installation was handled without any fuss.
Converted our garage in Wythenshawe into a home office. Great communication throughout and finished on schedule.
Useful information before you start planning a building project in Manchester.
Ask us a questionWe cover every inner Manchester postcode from M1 to M40 — including the city centre, Ancoats, Northern Quarter, Ardwick, Longsight, Rusholme, Fallowfield, Moss Side, Hulme, Whalley Range, Gorton, Levenshulme, Burnage, Withington, Didsbury, Chorlton, Wythenshawe, Cheetham Hill, Crumpsall, Harpurhey, Blackley, Collyhurst, Miles Platting and Newton Heath — plus the wider Greater Manchester area.
Yes. Manchester has a number of conservation areas and listed properties, particularly in and around the city centre and inner suburbs. We're experienced working within these constraints and can advise on what's required before work starts.
Yes, we liaise directly with Manchester City 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.
Yes, alongside period terraces and semis across Manchester's suburbs, we also carry out work in city centre apartment buildings, subject to the building's own management rules.
House extensions, knock throughs and steel beam installation, garage conversions, porches, bricklaying, garden walls and commercial building work — all available across every area of Manchester.
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.
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.
Tell KJL Builders what you have planned and arrange a free quote anywhere in Manchester.
Fill in the form below with a few details about your Manchester project and we'll get back to you with a free, no-obligation quote.
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