How it works

  1. Post a job

    Post a job

    Tell us about your job, and we'll alert suitable extension builders in Swansea. It’s simple and free.

  2. Hire a tradesperson

    Tradespeople respond

    Once your job is posted, you'll get responses from interested extension builders through the website.

  3. Leave feedback

    Review and choose

    Browse profiles, work history, and feedback, then choose who you wish to share your details with.

  • Building & Maintenance

    Extension Builder working in Swansea
    Trade Member since 2015

    A small company with many years of building experience, offering a high standard of work at reasonable rates. read more

    Latest Restoration & Refurbishment feedback review:

    Downstairs cloakroom & shower room

    I would recommend Andy to anyone looking for a good builder. He has done a great job which includes extra work that was not apparant at the start. Nothing has been to much trouble and has explained everything to us as. The job...

    By steven87143 on

  • Ideal Works Ltd

    Extension Builder working in Swansea
    Trade Member since 2015

    Ideal works is a family run company. We specialise in extensions and renovation projects from start to completion ,providing a quality service and finish. We have a long list of satisfied customers that have recommended us to family and friends. read more

    Latest Roofing (Flat) feedback review:

    Felt to fibreglass roof

    Great guys who have achieved a high level of workmanship on our repebbledashing and roof fibreglassing.

    By anon-221011001504415178 on

  • Built right building

    Extension Builder working in Swansea
    Trade Member since 2020

    I’m a local builder in Swansea that normally undertake and specialise in extensions. Loft conversion and building renovations. Most of my work is on recommendation from architects read more

    Latest Extensions feedback review:

    Shower room /bathroom

    Gareth did a excellent job very reliable and excellent builder

    By steven14204 on

  • JDD Builders LTD

    Extension Builder working in Swansea
    Trade Member since 2016

    JDL Building Ltd is a family run business based in sketty Swansea we have over 30 years combined experience covering all aspects of building work, we are hard working with high standards & quality service with great customer communication read more

    Latest Extensions feedback review:

    Small side extension

    We had this done in 2018, it’s amazing! The team were great and the job has transformed our living space with immediate access to the garden.

    By kath_e on

  • RJD Home Improvements

    Extension Builder working in Swansea
    Trade Member since 2018

    General building, roofing, landscaping, extensions, internal and external plastering including EWI system, PVC windows doors facia boards, guttering. read more

    Latest Plastering feedback review:

    Repair of plasterboard sagging ceiling - falling apart

    Rob's communication throughout this issue was fantastic, keeping me informed every step of the way. Provided an accurate quote and worked to the provided timelines. During the work Rob and his team were very professional and cleaned up...

    By hughprescott on

  • Martin Lewis Builders Ltd

    Extension Builder working in Swansea
    Trade Member since 2018

    We have built our business on a clear promise of supreme customer service & quality workmanship.We undertake all aspects of Construction and ground works and complete work to the highest standards possible within budget and to agreed timescales. Highly experienced with over read more

    Latest Bricklaying feedback review:

    Front wall

    We are really happy with the job Martin and his boys have done. The quality of the work is very good, they were punctual and polite - I'd have no hesitation in using them again in future and also recommending them.

    By rachholborow on

  • No Limit Construction

    Extension Builder working in Swansea
    Trade Member since 2023

    No Limit Construction is a leading construction company based in Swansea. With years of experience in the industry, we are committed to delivering exceptional construction services to our clients. Our team of skilled professionals is dedicated to providing top-quality read more

  • Athena Builders

    Extension Builder working in Swansea
    Trade Member since 2016

    My name is Andrew I am a qualified bricklayer and i am also working alongside a qualified carpenter and electrician. We at Athena building and electrical services think it's very important we make a good reputation for our business. We pride ourselves on our work to ensure read more

    Latest Repointing feedback review:

    Repoint chimney breast

    Andy was brilliant! Reliable and trustworthy, completed the job to an excellent standard. Would definitely recommend

    By owain56356 on

  • ABC Building & Roofing Services

    Extension Builder working in Swansea
    Trade Member since 2017

    we do full renovation new builds extensions we have been doing disabled grants for the last 10 years for Swansea council I have been doing the building for 24 years we r chas registered read more

  • Dai Mac

    Extension Builder working in Swansea
    Trade Member since 2021

    Property Mainainance. Kutchen fitting. Bathrooms. Extensions. All aspects of building. read more

  • Critical Group Ltd

    Extension Builder working in Swansea
    Trade Member since 2023

    We undertake projects from small handy man projects to large scale projects. We also offer a construction consultancy operation where we can advise on cost, programme and overall life cycle of projects. All aspects of construction. read more

  • Carl Richards Building Contractor

    Extension Builder working in Swansea
    Trade Member since 2018

    my business is called carl Richards building contractor.i am a time served bricklayer since 1988 my business has been trading with this name since 2000 so 18 year. i do all the trade work myself and i take on all building work apart from plumbing and electrical work . my read more

    Latest Bricklaying feedback review:

    Ramp on drive for wheel chair

    Job in progress ,so far excellent

    By bob92700 on

  • Dunvant Building Services

    Extension Builder working in Swansea
    Trade Member since 2016

    We are Dunvant Building Services, specialising in General Building Work, from complete extensions, all roofing, inc flat roofing, internal alterations, landscaping, drainage, home maintenance, mini digger work. Over 25 years experience in the building trade, approachable, read more

    Latest Bricklaying client reference:

    Mark Davies has over time completed various jobs at my property. He has cut out and installed two extra Windows. Cured a damp problem by removing and replacing bricks in the outside wall and carried out extensive repointing work. He has...

    Reference taken by MyBuilder on

  • KG carpentry and building

    Extension Builder working in Swansea
    Trade Member since 2018

    We are a local carpentry/building firm who take on anything from the smaller jobs such as skirtings, fitting internal doors, kitchen fitting, full bathroom refits. We also take on larger jobs such as shop fits, HMO’s, extensions and attic conversions, with an affordable read more

    Latest Loft Conversions feedback review:

    Loft hatch + ladder ,board loft,install light in loft.

    I am very satisfied with the work completed: to install a loft ladder and hatch, also fully board the loft and install lighting.A clear breakdown of the cost ( which is not as common as it should be), and a reasonable quote for the...

    By karen96966 on

  • Mason & Mistry Building Contractors

    Extension Builder working in Swansea
    Trade Member since 2021

    We specialise in home remodeling and extensions. From architecture concept visualisation to delivering your project on time. We manage entire project to include full electrical installation, automation and plumbing works. read more

  • Johns and Hopkins Construction

    Extension Builder working in Swansea
    Trade Member since 2014

    We have been trading for the past 24 years in and around the Swansea area. Over the years we have built up a good reputation with our customers with over 75% of our work coming from customer recommendations. read more

    Latest Conversions - General client reference:

    I had my kitchen knocked through into my dinning room to make one room and new kitchen fitted. patio doors installed on to garden, house had a complete re wire and was plastered throughout. Andrew was a very reliable and professional...

    Reference taken by MyBuilder on

  • Baggridge Building Services

    Extension Builder working in Swansea
    Trade Member since 2018

    Baggridge building services have combined experience of over 30 years in the building trade. We are reliable, honest and committed to customer satisfaction. Recently we have completed a double story extension, full garden renovation which included artificial grass, slabs and read more

    Latest Roofing (Pitched) feedback review:

    Break in the gulley lead

    From start to finish unbelievable quick. Very comfortable to talk to Mike. no nonsense and fairly priced. Went above and beyond cleaned the gutter as well. Wish I knew this family business long before. Will definitely be calling them again...

    By lian_96 on

  • N.B Plumbing and Heating

    Extension Builder working in Swansea
    Trade Member since 2017

    I am a plumber/gas engineer based in the Swansea area. I have been in the trade for 14 years and with this I have a gaind alot of knowledge in all aspects within the plumbing and gas industry. I take pride in my work, I am very professional and I always go above and beyond read more

    Latest Bathroom Fitting feedback review:

    Upstairs/downstairs suite fitted and decorate

    Nathan, and Mark are true professionals at their trade. They did a great job with my bathroom and cloakroom. I would definitely recommend these tradesmen to anyone who is thinking of getting their bathroom done. Thank you. Kevin.

    By kevinevans60 on

  • Morgan Building Company

    Extension Builder working in Swansea
    Trade Member since 2023

    I am a qualified bricklayer with 14 years experience in the building trade. I have a wealth of experience carrying out brickwork, extensions, new builds, remodelling and landscaping. I have worked in London and Surrey before moving back home to Swansea in 2020. I am read more

  • Blue kite builders

    Extension Builder working in Swansea
    Trade Member since 2021

    Blue kite builders undertake all building services from new builds to complete renovations and everything in between. With over 35 years experience combined we can make your dream home turn into reality read more

    Latest Bricklaying feedback review:

    New steps

    Brilliant job done by Scott for us over the weekend highly recommend will definitely be using him again for more projects we need doing. Well done 👏

    By mrs_phillips on

What can extension builders do?

MyBuilder is the simplest way to find a reviewed and vetted extension in your local area. We can connect you with local extension builders near you, so you can choose the ideal tradesperson for your project with confidence.

Whether your plans are big or small, we can help you find a skilled extension builder to support you with your job. Your contact details are only shared with tradespeople you want to speak to, so you can check out their credentials, read honest customer reviews and get free quotes to compare.

There are lots of jobs that extension builders can help with, including:

  • Extending your home with an extra room
  • Two+ storey extensions
  • Adding partition walls to create more rooms
  • Building annexes or external structures

Top Extension Builder Reviews

98%

Extension Builders working near Swansea in West Glamorgan have an average review score of 98% positive based on 756 homeowner reviews.

Trusted by experts

Mumsnet rated 2019

Don’t just take our word for it, homeowners love MyBuilder too. We’re proud to be rated by Mumsnet.

Ask an Extension Builder

Our vetted professionals answer your home improvement questions

See more questions