Find an Extension Builder in Letchworth

Find a local extension builder near you. We have 3,762 trusted and reviewed extension builders in Letchworth to choose from, based on 1,706 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 Letchworth will then be in touch to quote for the work.

CHOOSE YOUR EXTENSION BUILDER

Compare quotes then choose your preferred Letchworth Extension Builder.

Extension Builders in Letchworth

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 3,762 extension builders

    We have been in business since 1999, doing property renovations, extensions, Bathrooms, Kitchens, we have a large portfolio of work to show what work we can do. we are very considerate to our customers and their neighbors regarding our work we are ve...

    Based in SG6 4LS, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Aug 2024
    ID Checked

    Experienced building and general maintenance repair company based in north Hertfordshire covering the south east of England. We take great pride in our work and our reliability to complete the job to customer satisfaction. We offer a competitively...

    Based in SG6 4QE, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since May 2021
    ID Checked

    CSR are a family run business with over 38 years of experience in both office refurbishments/fit-outs and warehouse refurbishments/fit-outs, dilapidations and general building work, working for a wide variety of commercial, public and private sector...

    Based in SG6 1GJ, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Feb 2017
    ID Checked

    Over 30 years experience specialising in block paving,patios and fencing all aspects of groundwork

    Based in SG6 3RF, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Jul 2025

    We are a reliable Hertford-based building and property maintenance company providing high-quality home improvements, repairs and refurbishment services throughout Hertfordshire and surrounding areas. With strong experience working on residential and...

    Latest Builder Review

    "Harvey was very professional and completed the job in one day despite it being a 2 man job. His partner was unable to work due to illness. The plaster work to the cieling is faultless. Harvey moved the furniture, provided some..."

    Reviewed by on
    Based in SG14 2FF, Hertford
    Extension Builder covering Letchworth
    Member since Nov 2025
    ID Checked

    Are you looking to transform your indoor/outdoor space??? K&L Build Design and Maintenance is a trusted building and landscaping company committed to delivering exceptional workmanship and reliable service across every project. Specialising in b...

    Latest Chimney Building / Repair Review

    "Good guys, came in time, done the job, no fuss, left no sign behind after the job. Would recommend."

    Reviewed by on
    Based in WD25 9EU, Watford
    Extension Builder covering Letchworth
    Member since Nov 2025
    ID Checked

    NLK Group, based in London, provides bespoke services in carpentry installation, custom-made wardrobes and cabinets, house refurbishments, and various construction projects. Our offerings include: • Kitchen fittings • Fitted wardrobes • Painting...

    Latest Wooden Doors - External Review

    "Naim did a fantastic job with replacing our external doors- front and rear. Communication was great and we are happy with the results."

    Reviewed by on
    Based in WD25 0GD, Watford
    Extension Builder covering Letchworth
    Member since Nov 2016
    ID Checked

    Small building contractor, patios, driveways, landscaping, garage and shed bases, painting and decorating. Based in Herts. Fully insured.

    Latest Concrete Base Review

    "Polite, respectful, experienced and skilful. Great tradespeople who I will use in the future for many varied tasks and projects."

    Reviewed by on
    Based in AL1 5ST, Saint Albans
    Extension Builder covering Letchworth
    Member since Jul 2025
    ID Checked

    2Rok cons is a dynamic and experienced team, committed to providing excellence in general building and constructions, lateral thinking and innovation solutions to our clients. With a portfolio covering a wide range of construction projects, we are pr...

    Latest Builder Review

    "2Rok cons ltd has just finished creating our dream Kitchen. From our first meeting to finishing the project, they listened to what we wanted and gave us design and material guidance for our kitchen extension. We are very fussy wit..."

    Reviewed by on
    Based in WD7 7LW, Radlett
    Extension Builder covering Letchworth
    Member since Nov 2023
    ID Checked

    my name is Josh. I am honest and hardworking my craftsmanship is next to none. I give clients my full attention and can answer any questions they wish to ask. Myself and my trusted team cater for all aspects of construction eg extensions,garage conv...

    Based in SG6 3AY, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since May 2017
    ID Checked

    building and maintenance contractors city and guild Electrics

    Based in SG6 2NZ, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Feb 2014

    Very professional work fully garanteed.Our High quality work gives us our ongoing customer satisfaction.Fully competent with domestic and commercial building and maintenance. Kitchens , bathrooms , Painting ,Decorating, paper hanging ,vinyl and wood...

    Based in SG6 2SA, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Mar 2025
    ID Checked

    We are a local family run building and maintenance company. Established in 2015 we have expanded largely over the past 4 years offering a reliable, affordable and most importantly friendly building service. Our customers make our business so we aim t...

    Based in SG6 4HY, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Nov 2019
    ID Checked

    SureBuild Homes specialises in extensions. new builds, loft & garage conversions, plumbing and heating, bathroom and kitchen re-fits. We are Federation of master Builder and carry full insurances. We pride ourselves on giving all of our cust...

    Based in SG4 0QE, Hitchin
    Extension Builder covering Letchworth
    Member since Feb 2023
    ID Checked

    Vertex Construction provides high standard quality professional works both internal and external. From new builds and extensions to complete renovations , drainage, all aspects of groundwork and landscaping. For all projects big and small a free qu...

    Based in SG4 0PU, Hitchin
    Extension Builder covering Letchworth
    Member since Apr 2022
    ID Checked

    Focus Structural Limited have been established for over twenty years and provide a complete general building service from small to large projects. We pride ourselves in giving excellent customer service and value for money for clients around the Her...

    Based in SG7 6LH, Baldock
    Extension Builder covering Letchworth
    Member since Jan 2022
    ID Checked

    Very experienced carpenter and joiner with 3 years city and guilds qualified. Over 15 year’s experience in both 1st and 2nd fix carpentry interior and exterior. Fully insured Covering Herts,Beds & Bucks Some jobs we cover Kitchens Bespoke units...

    Based in SG6 1DD, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Oct 2022
    ID Checked

    We have a very experience team that specialise in various services and no job is too big or too small. The below is a list of our services: - shed builders - rendering - painting and decorating - driveways - carpentry - construction of garden build...

    Based in SG6 1RJ, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Oct 2025

    Hello there my small Limited company that been operating for over 10 years we are hard working and very experienced in the fields we have cscs, ccdo asbestos awareness training. We are trust worthy and work at a competitive rate

    Based in SG6 1RN, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Aug 2022
    ID Checked

    Im planning to do an apprenticeship in carpentry to as a beginner with no experience because carpentry is what I've always wanted to do and I feel like I have the skills to do it. I live in Letchworth Garden city and im 17 years old looking for...

    Based in SG6 2LL, Letchworth Garden City
    Extension Builder covering Letchworth
    Member since Mar 2023
    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.

    To understand more about our reviews process, please visit our Reviews Policy.

    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 Buntingford

    Build extention on second floor for two more bedrooms. Original extention only did the ground floor

    Job posted in Berkhamsted

    Single story rear extension 12sqm approximately, french door, extended kitchen with centre island

    Job posted in Luton

    I need a single internal wall built to divide an existing room and create a separate kitchen area.

    Job posted in Milton Keynes

    Rear double storey extension semi detached house milton keynes

    Job posted in Watford

    Build 2 storey extension, 6m ground floor and 3 meters first floor. Cost of loft conversion will be helpful to make a decision. We have Full new build...

    Job posted in Buntingford

    Build extention on second floor for two more bedrooms. Original extention only did the ground floor

    Job posted in Berkhamsted

    Single story rear extension 12sqm approximately, french door, extended kitchen with centre island

    Job posted in Luton

    I need a single internal wall built to divide an existing room and create a separate kitchen area.

    Job posted in Milton Keynes

    Rear double storey extension semi detached house milton keynes

    Job posted in Watford

    Build 2 storey extension, 6m ground floor and 3 meters first floor. Cost of loft conversion will be helpful to make a decision. We have Full new build...

    Job posted in Leighton Buzzard

    We want to add a room downstairs into from our utility room and downstairs bedroom so we can have a dedicated office space.

    Job posted in Leighton Buzzard

    single story extension approx 20sqm with roof lantern and bi-fold doors.

    Job posted in Potters Bar

    Need a 12x5.5m ground floor extension she’ll only which I have planning for we are still waiting for first floor to be approved on second application...

    Job posted in Luton

    we are looking at extending above single loft to give another bedroom with en-suite

    Job posted in Waltham Abbey

    I intend to build a one-storey kitchen/diner extension at the back of the house, 15 square feet. I will be liaising with the Planning Department rega...

    Job posted in Leighton Buzzard

    We want to add a room downstairs into from our utility room and downstairs bedroom so we can have a dedicated office space.

    Job posted in Leighton Buzzard

    single story extension approx 20sqm with roof lantern and bi-fold doors.

    Job posted in Potters Bar

    Need a 12x5.5m ground floor extension she’ll only which I have planning for we are still waiting for first floor to be approved on second application...

    Job posted in Luton

    we are looking at extending above single loft to give another bedroom with en-suite

    Job posted in Waltham Abbey

    I intend to build a one-storey kitchen/diner extension at the back of the house, 15 square feet. I will be liaising with the Planning Department rega...

    Job posted in Milton Keynes

    A builder has built cycle shed as part of big extension. It was not done up to the mark and rushed through. I want someone to come and fix it to stand...

    Job posted in Cambridge

    Build a single storey extension at the backnof house with a skyglass at the roof in the back garden area

    Job posted in Arlesey

    Single story extension to make front porch and enlarge kitchen

    Job posted in Welwyn Garden City

    Quotation and availability for rebuilding the garage and a new wetroom extension to the property

    Job posted in Luton

    I want a single story 8m squared extension with a remodel of a small bathroom around 2.25m squared

    Job posted in Milton Keynes

    A builder has built cycle shed as part of big extension. It was not done up to the mark and rushed through. I want someone to come and fix it to stand...

    Job posted in Cambridge

    Build a single storey extension at the backnof house with a skyglass at the roof in the back garden area

    Job posted in Arlesey

    Single story extension to make front porch and enlarge kitchen

    Job posted in Welwyn Garden City

    Quotation and availability for rebuilding the garage and a new wetroom extension to the property

    Job posted in Luton

    I want a single story 8m squared extension with a remodel of a small bathroom around 2.25m squared

    Job posted in Hemel Hempstead

    I’m looking to build an extension at the back of my house into the garden has a new kitchen diner and was just wondering on costs

    Job posted in Stevenage

    Single story at back of the house. Small utility room and the rest will extend existing kitchen diner. Bifold doors into the garden

    Job posted in Welwyn Garden City

    We would like to extend the back of the property out between 1.5 - 2meters. Also we have an outside building which is currently 3 rooms ( a storage cu...

    Job posted in Welwyn Garden City

    Rear extension kitchen & dining. Removal of no weight bearing partisan wall between existing kitchen and dining area . removal of existing kitchen and...

    Job posted in Hertford

    We need a rear second story one room extension and new pitched roof plus work on the ground floor, blocking in a rear door and installing read French...

    Job posted in Hemel Hempstead

    I’m looking to build an extension at the back of my house into the garden has a new kitchen diner and was just wondering on costs

    Job posted in Stevenage

    Single story at back of the house. Small utility room and the rest will extend existing kitchen diner. Bifold doors into the garden

    Job posted in Welwyn Garden City

    We would like to extend the back of the property out between 1.5 - 2meters. Also we have an outside building which is currently 3 rooms ( a storage cu...

    Job posted in Welwyn Garden City

    Rear extension kitchen & dining. Removal of no weight bearing partisan wall between existing kitchen and dining area . removal of existing kitchen and...

    Job posted in Hertford

    We need a rear second story one room extension and new pitched roof plus work on the ground floor, blocking in a rear door and installing read French...

    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