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Find an Extension Builder in Welwyn
Find a local extension builder near you. We have 6,998 trusted and reviewed extension builders in Welwyn to choose from, based on 2,791 reviews.
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Extension Builders in Welwyn
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Small building contractor, patios, driveways, landscaping, garage and shed bases, painting and decorating. Based in Herts.
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 Richard on 12th Aug 2025Based in AL1 5ST,
Saint Albans
Extension Builder covering Welwyn
Member since Jul 2025
ID Checked
Independent sole trader. Small builds - patios, gardens, sheds, summerhouses, general tidy-ups, brickwork and general handyman work. Reasonable and fair pricing. References and photos of past work completed available upon request.
Latest Wooden Decking Review
"⭐️⭐️⭐️⭐️⭐️ We had an excellent experience working with Joe. He came over to give us a quote and carefully walked us through options that suited a low, mid, and slightly higher budget—which showed how transparent and considera..."
Reviewed by Yu on 12th Jun 2025Based in SG3 6DU,
Knebworth
Extension Builder covering Welwyn
Member since Mar 2025
ID Checked
I am Florin, working as a self employed. As always, I loved to respect my clients and give them my best. ? with hard work to achieve always 5*.
Latest Concrete Base Review
"The service was excellent from start to finish. From the original quote, someone came to my house to take the right measurements to quote my job. I was happy with the quote and proceeded with the job. A team of 2 people complete t..."
Reviewed by Kos on 10th Jun 2025Based in SG2 8QR,
Stevenage
Extension Builder covering Welwyn
Member since Nov 2020
ID Checked
JCU who are we? We are a company that started as a dream by the director Joe Abbott. To build a better construction and plant hire image and take away the stress away from building your future. We own various plant that will help you drive costs dow...
Based in AL6 9SU,
Welwyn
Extension Builder covering Welwyn
Member since Jan 2023
ID Checked
After almost 20 years in supply of materials to the Trade, we decided to put our knowledge into practice and deliver high quality, reliable and honest workmanship, utilising a vast database of experienced and highly motivated tradesmen. We have va...
Based in SG3 6JS,
Woolmer Green
Extension Builder covering Welwyn
Member since Aug 2024
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 Glendale on 25th Oct 2025Based in WD25 0GD,
Watford
Extension Builder covering Welwyn
Member since Nov 2016
ID Checked
A family business committed to quality, value and client satisfaction in every project. From little kitchen to big extensions
Latest Garage Conversion Review
"Great Price , great communication and completed job to high spec , very good team with him"
Reviewed by Ryan on 24th Oct 2025Based in HA7 1FP,
Stanmore
Extension Builder covering Welwyn
Member since Jan 2020
ID Checked
We are a building company that specialise in refurbishment work. Residential or Commercial works. We have been working in the industry for 30 years. We are happy to give you a quote for all types of work, with no obligation.
Latest Structural Steelwork Review
"Professional and prompt provision of written job specification and estimate. Good quality work rebuilding and repairing patio retaining wall, completed within agreed time. Would definitely use again."
Reviewed by Pam on 17th Oct 2025Based in HA6 1BG,
Northwood
Extension Builder covering Welwyn
Member since May 2025
ID Checked
Professional Work, Quality You Can Trust We deliver top-quality workmanship at reasonable prices, whether your project is big or small. Our team is reliable, experienced, and ready to handle any job, offering fair pricing for both customers and trade...
Latest Plaster Skimming Review
"Super quick and efficient"
Reviewed by Marta on 10th Oct 2025Based in HA9 8SN,
Wembley
Extension Builder covering Welwyn
Member since Oct 2025
ID Checked
i’ve been on the business for 25 years I do all types of building work, internal and external, Very high standards work, House renovation, extension, loft conversion, and new built.
Latest Garage Conversion Review
"Alfred and his crew were professional, flexible and found cost-effective solutions. Highly recommended"
Reviewed by Malcolm on 9th Sep 2025Based in N13 6HJ,
London
Extension Builder covering Welwyn
Member since Mar 2024
ID Checked
We are a family ran business, that has been in operation for over 10 years. We specialise in home refurbishments, plumbing, electrical and gas heating. We are available in London, Surrey, Kent, Essex, Middlesex, Buckinghamshire, Berkshire, Hertfordsh...
Latest Solid Timber Flooring Review
"Noble builders were quick, reliable and most of all trustworthy. The work they did for me was of a high standard and at a competitive price. I would recommend these builders to anyone and would use them again."
Reviewed by Aubrey on 1st Aug 2025Based in SE28 0NP,
London
Extension Builder covering Welwyn
Member since Jul 2024
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 Craig on 27th Jul 2025Based in WD7 7LW,
Radlett
Extension Builder covering Welwyn
Member since Nov 2023
ID Checked
More then a decade of experience in uk domestic building i am a excelent carpenter and I have big experience in roofing (pich roof flat roof etc) good skill in painting,tiling,plastering,drylining etc We are a complete team with including all the spe...
Latest Log Cabins / Timber Framed Building Review
"A fantastic and amazing friendly customer care and service , together with a very perfessional 100 % 100% craftsmanship, very reliable delivered on his work ,I will be using his services again,I will be highly recommending his s..."
Reviewed by David on 26th May 2025Based in HA5 4HR,
Pinner
Extension Builder covering Welwyn
Member since Mar 2023
ID Checked
Ex site manager with a lot of experience in build and technical. Very well informed in regards to building control. No job too small, please get in touch to see how I can help bring your project to life.
Latest Builder Review
"This is the second time I’ve used Oz and I’m delighted with the quality of the work. Oz has a wealth of experience and knows how to do things properly. He really cares about the quality of his work, and is a great problem solver a..."
Reviewed by Jerry morris on 19th May 2025Based in LU1 5LG,
Luton
Extension Builder covering Welwyn
Member since May 2024
ID Checked
Welcome to Edward Construction, your trusted driveway contractors based in the heart of South Hornchurch. We proudly serve the vibrant community of Havering, London, with our expert driveway services. Our team is dedicated to transforming your outdoo...
Latest Floor Tiling Review
"Conducted the job, quickly and thoroughly and to expectation. Kept informed through every step of the way. Would recommend for future work."
Reviewed by Jamie on 14th Apr 2025Based in AL10 9GS,
Hatfield
Extension Builder covering Welwyn
Member since Feb 2025
ID Checked
Kings Brickwork & Property Maintenance • Over 20 year’s experience • Brickwork and Heritage repairs • Ground works • Internal and External repairs and Construction • Kitchen instillations • Office fit outs • Free quotations and advise
Latest Brick/Block Paving Review
"Adam did a fantastic job, communication was great and he completed the job within the week. Pricing was fair. Would definitely recommend"
Reviewed by Emily on 8th Mar 2025Based in AL7 3XF,
Welwyn Garden City
Extension Builder covering Welwyn
Member since Dec 2024
Public liability insurance
20 years ago we started a handyman service in and around Welwyn Garden City , this grew into setting up a building company as the work and size of the jobs grew with all the happy customers LOCAL BUILDER 15 YEARS QUALITY WORK WITH LOTS OF RECOMENDA...
Based in AL7 3UW,
Welwyn Garden City
Extension Builder covering Welwyn
Member since Jul 2023
ID Checked
Your local building firm with over 10 years experience
Based in AL6 9JG,
Welwyn
Extension Builder covering Welwyn
Member since Mar 2024
Megalight Technologies Ltd: A UK based structural engineering company which does drawings and blueprints, Extensions, Loft Conversions and HouseRef
Based in AL8 7HQ,
Welwyn Garden City
Extension Builder covering Welwyn
Member since Oct 2025
Complex Construction LTD We do professional ,affordable and best quality of building services -Tarmac surfacing -Driveways -Home extension -Brickwork -Tiling -fencing 100 % Guarantee and 10% Discount 10 years warranty For free quotation call Claudio
Based in AL7 1NH,
Welwyn Garden City
Extension Builder covering Welwyn
Member since Apr 2025
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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.
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