Find an Extension Builder in Cardiff County

Find a local extension builder near you. We have 1,029 trusted and reviewed extension builders in Cardiff County to choose from, based on 681 reviews.





POST YOUR JOB

Tell us about the work you need doing around your home.

RECEIVE UP TO 3 QUOTES

Up to 3 Extension Builders in Cardiff County will then be in touch to quote for the work.

CHOOSE YOUR EXTENSION BUILDER

Compare quotes then choose your preferred Cardiff County Extension Builder.

Extension Builders in Cardiff County

Filter by:

  • Within 60 minutes
    • Within 60 minutes
    • Within 45 minutes
    • Within 30 minutes
    • Within 20 minutes
    • Within 10 minutes
  • Any rating
    • Any rating
    • 5 star rating
    • 4 star rating
    • 3 star rating
  • Sort by:

  • Recommended
    • Recommended
    • Closest
    • Most reviews
    • Highest rating
  • 1-20 of 1,029 extension builders

    Hi my name is malcolm we cover all aspects of building work etc extension and bricklaying chimney repairs rendering plastering stone masonry landscaping pointing driveways structural opening drainage underpinning home improvement and many more We h...

    Latest Garage / Outbuilding Construction Review

    "They were excellent. They knew exactly what we wanted and built it all quickly and to a brilliant standard. Would absolutely recommend them to anyone."

    Reviewed by on
    Based in CF5 4LX, Cardiff
    Extension Builder covering Cardiff County
    Member since Nov 2017
    ID Checked

    We are a local company that has been going for 11 years on our own. Really great reputation in the local community. With business and private and landlord residential properties We offer a free quote and high quality of work produced

    Latest Drains & Sewerage Review

    "CARRIED OUT WELL GOOD JOB"

    Reviewed by on
    Based in CF23 7DD, Cardiff
    Extension Builder covering Cardiff County
    Member since Feb 2025
    ID Checked

    Regency building services cover everything from extensions loft conversions new builds to renovations. We also cater to kitchen and bathroom fitting. What ever you need we got you covered

    Latest General Maintenance Review

    "Abdul was prompt, polite completed everything asked of him and left the site clean and tidy. Whist this job involved building work and carpentry from watching him work I know that he is capable of many other things. Wil have him..."

    Reviewed by on
    Based in CF11 8FT, Cardiff
    Extension Builder covering Cardiff County
    Member since Jun 2025
    ID Checked

    we are a family run bussiness that have running for 5 years. We work doing landscape gardening projects, We work in cardiff and surrounding areas

    Latest General Maintenance Review

    "They were excellent and completed the job under very hot conditions. I will use them again."

    Reviewed by on
    Based in CF3 1QZ, Rumney
    Extension Builder covering Cardiff County
    Member since May 2025
    ID Checked

    Master Craft Builders LTD Here at MCB we pride ourselves on exceptional workmanship. We are hardworking individuals and always leave the job clean as it was before we arrived. Choosing us allows you to take advantage of our multiple skilled tradesman...

    Latest General Maintenance Review

    "Jack and Adam were fantastic to have around. They turned up early and worked incredibly hard to complete our new ceiling. They cleaned up and were positive and pleasant to have in the house. Would definitely recommend Jack!"

    Reviewed by on
    Based in CF3 5QD, Llanrumney
    Extension Builder covering Cardiff County
    Member since Nov 2024
    ID Checked

    Hi we are a friendly and honest Company, who always do everything to help and make customers feel safe and happy, we price all Jobs with exact price from start to finish, everything is done in a law contract, so costoms feel lot safer from cowboys,...

    Latest Internal Walls Review

    "We are really pleased with the work we've had completed by Dean, Honesty Builders. Dean is very Friendly, professional, reliable, honest, trustworthy and very knowledgeable. Always turns up just as he says he will, great communica..."

    Reviewed by on
    Based in CF45 3TL, Mountain Ash
    Extension Builder covering Cardiff County
    Member since Jan 2020
    Public liability insurance

    <p>Welcome to Wow Builder, your go-to experts for all building and construction needs in the vibrant city of Cardiff. Based in the charming suburb of Birchgrove, we specialise in a wide range of services including builders, property maintenance...

    Latest Electric Showers Review

    "Quick to respond, replaced shower mixer and gave good advice"

    Reviewed by on
    Based in CF14 1TT, Cardiff
    Extension Builder covering Cardiff County
    Member since Mar 2025
    Public liability insurance

    Experienced worker, passionate about work, reliable colleague.

    Based in CF5 1PJ, Cardiff
    Extension Builder covering Cardiff County
    Member since Jul 2024

    We have over 35 years experience in the construction trade, specialising in anything walls and ceilings. Whether you need walls erected in your home, or perhaps a new ceiling, we are happy to help! We can also provide aspects of carpentry such as ski...

    Based in CF11 6JF, Cardiff
    Extension Builder covering Cardiff County
    Member since Apr 2024
    ID Checked

    Family run business with over 30 years experience. We take pride in catering for all your construction needs. Including all aspects of extensions, renovations, carpentry, plumbing, landscaping building around South Wales.

    Based in CF11 8HQ, Cardiff
    Extension Builder covering Cardiff County
    Member since Apr 2024
    ID Checked

    Do abit of everything right renovating a home but it's at a hold

    Based in CF11 6QU, Cardiff
    Extension Builder covering Cardiff County
    Member since Mar 2025

    Services provided: Plastering, Patios, Bricklaying, Carpentry,Tiling, Rendering, wall panels, small extension, we provide you the best service with reasonable price .

    Based in CF11 7AR, Cardiff
    Extension Builder covering Cardiff County
    Member since Mar 2023

    I'm looking for a job I'm interested construction work

    Based in CF24 3PZ, Cardiff
    Extension Builder covering Cardiff County
    Member since Sep 2024

    With over 35 years combined experience in the building industry,we specialise in Building Domestic property extensions to the highest of standards, whilst also providing first class customer service to all of our projects,We believe that reputation i...

    Based in CF24 1TP, Cardiff
    Extension Builder covering Cardiff County
    Member since Jun 2024

    I have people around 15 members who work for you. Our Services are: 1. Bathroom Fitter 2. Builder 3. Carpenter 4. CCTV 5. Cleaner 6. Drain Specialist 7. Floor Fitting 8. Gardener 9. Handyperson 10. Loft conversion 11. Paint & Decorating 12. Plast...

    Based in CF11 6RU, Cardiff
    Extension Builder covering Cardiff County
    Member since Sep 2022
    ID Checked

    ALL IN ONE You name it WE'LL do it We offer all types of home services, from house and garden work to cooking and cleaning, all at the best prices with free quotes!

    Based in CF10 3EH, Cardiff
    Extension Builder covering Cardiff County
    Member since Aug 2025

    Builder -Plumber Flooring, kitchen bathroom Gardener other

    Based in CF24 3DL, Cardiff
    Extension Builder covering Cardiff County
    Member since Feb 2023

    Hey I'm Sam i do bathroom &kitchen &tiles /lemnit flooring and gardens & roofing &blaming

    Based in CF24 0EX, Cardiff
    Extension Builder covering Cardiff County
    Member since Aug 2024

    Welcome To : HEAVEN BUILDERS LTD This is where we specialise in making your ideas come to life we are a company that covers all aspects off construction we also Have a waste carriers license that allow us to dispose of waste we are a dedicated team...

    Latest House clearance Review

    "Friendly and professional lads, quote was very competitive and they showed up short notice to help us out. Highly recommend and would definitely use them again 👍"

    Reviewed by on
    Based in CF14 3NW, Cardiff
    Extension Builder covering Cardiff County
    Member since Jul 2025
    ID Checked

    I founded my building company over 20 years ago, since which time I have proudly watched it expand into an exceptional team of friendly and highly skilled perfectionists. We care passionately about our work and also pride ourselves on being great lis...

    Latest Wooden Doors - External Review

    "Piotr did a fantastic job converting our old garage into an office and storage space. Piotr is hardworking, diligent and very good at his craft. (And he even fed our cat when we were away!) We would not hesitate to recommend him..."

    Reviewed by on
    Based in BS10 7PW, Bristol
    Extension Builder covering Cardiff County
    Member since Jan 2025
    Public liability insurance
    Become a member

    Over 50,000 tradespeople nationwide use MyJobQuote

    Sign up as a trade
    Our Reviews

    All reviews are submitted by homeowners who have had work completed as part of using our service. Whilst every effort is made to verify and check reviews, we ask all homeowners to conduct their own research and follow our Homeowner Checklist before hiring.

    Find Extension Builders Near You

    Trusted Extension Builders in other locations

    Show more

    Recently posted Extension Builders jobs

    Join over 1,000,000 happy homeowners who have posted their job on MyJobQuote.

    Job posted in Bridgwater

    to be rendered in sand and cement around two windows and a drip bead required. joining to existing building, covering block work .Need to visit site o...

    Job posted in Maesteg

    Build double storey extension at rear of terraced property. Tie into existing adjoining properties, block inner walls and block and Render outer leaf....

    Job posted in Ferndale

    I would like a porch on my front door looking for a quote

    Job posted in Llantwit Major

    composite decking area with concrete foundation and brick surround with decorative stones.

    Job posted in Weston-super-Mare

    Need a pergola built with slatted sides

    Job posted in Bridgwater

    to be rendered in sand and cement around two windows and a drip bead required. joining to existing building, covering block work .Need to visit site o...

    Job posted in Maesteg

    Build double storey extension at rear of terraced property. Tie into existing adjoining properties, block inner walls and block and Render outer leaf....

    Job posted in Ferndale

    I would like a porch on my front door looking for a quote

    Job posted in Llantwit Major

    composite decking area with concrete foundation and brick surround with decorative stones.

    Job posted in Weston-super-Mare

    Need a pergola built with slatted sides

    Job posted in Llantwit Major

    composite decking area with concrete foundation and brick surround with decorative stones.

    Job posted in Maesteg

    Extention onto existing utility room

    Job posted in Cowbridge

    Build single storey extension at rear of house Approx 12 - 20 metre squared Glass to be installed Walls removed Made good Looking for work to be...

    Job posted in Cardiff

    Extend the back of the priory 2m out. The width is 3.5 metres. Extension to have windows and a patio door.

    Job posted in Pontypridd

    Extension off lounge- to extend the lounge. Sky lights

    Job posted in Llantwit Major

    composite decking area with concrete foundation and brick surround with decorative stones.

    Job posted in Maesteg

    Extention onto existing utility room

    Job posted in Cowbridge

    Build single storey extension at rear of house Approx 12 - 20 metre squared Glass to be installed Walls removed Made good Looking for work to be...

    Job posted in Cardiff

    Extend the back of the priory 2m out. The width is 3.5 metres. Extension to have windows and a patio door.

    Job posted in Pontypridd

    Extension off lounge- to extend the lounge. Sky lights

    Job posted in Burnham-on-Sea

    Build a single story room off the kitchen and to block up an existing door

    Job posted in Pontypridd

    I need a quote for a single storey extension of an existing kitchen on a property that I'm looking to buy. The foundations/drainage of the extension h...

    Job posted in Cardiff

    Build a side extension approx 6 m at the same time, installing a kitchen, and moving the bathroom from downstairs to upstairs.

    Job posted in Bristol

    Single story extension. Would be 2rooms. 1st to fit a single bed (medical bed) and chest of drawers going into second room as a wet room with shower a...

    Job posted in Blackwood

    extend the kitchen out too the side and connect it too the basement below with a staircase

    Job posted in Burnham-on-Sea

    Build a single story room off the kitchen and to block up an existing door

    Job posted in Pontypridd

    I need a quote for a single storey extension of an existing kitchen on a property that I'm looking to buy. The foundations/drainage of the extension h...

    Job posted in Cardiff

    Build a side extension approx 6 m at the same time, installing a kitchen, and moving the bathroom from downstairs to upstairs.

    Job posted in Bristol

    Single story extension. Would be 2rooms. 1st to fit a single bed (medical bed) and chest of drawers going into second room as a wet room with shower a...

    Job posted in Blackwood

    extend the kitchen out too the side and connect it too the basement below with a staircase

    Job posted in Pontyclun

    Two storey side extension set back slightly. Garage below bedroom with en-suite above

    Job posted in Cardiff

    Build a single storey extension with large glass sliding door onto garden off existing lounge

    Job posted in Newport

    Looking for additional extension to the second floor, to move the bathroom from downstairs to upstairs, while extending the kitchen. Possibly extend s...

    Job posted in Caerphilly

    Build single storey extension with en-suite.

    Job posted in Newport

    Need to extend back door to 3 m wide gate.

    Job posted in Pontyclun

    Two storey side extension set back slightly. Garage below bedroom with en-suite above

    Job posted in Cardiff

    Build a single storey extension with large glass sliding door onto garden off existing lounge

    Job posted in Newport

    Looking for additional extension to the second floor, to move the bathroom from downstairs to upstairs, while extending the kitchen. Possibly extend s...

    Job posted in Caerphilly

    Build single storey extension with en-suite.

    Job posted in Newport

    Need to extend back door to 3 m wide gate.

    Post your job Sign up as a trade
    Are you a trade? Become a member and get access to local jobs today!
    See demand near you
    Ready to find a tradesman near you?

    Over 1 million homeowners and over 50,000 tradespeople
    use MyJobQuote nationwide each year