Describe your job with details to view a tailored list of tradespeople.
Post your job

Extension builders in Welwyn Garden City

Easily find verified Welwyn Garden City Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Welwyn Garden City.

How it works

Post your job for free

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Review profiles and choose

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

Some of our top rated extension builders in Welwyn Garden City

1991 Results

Sort by:

  • Extension Builder in Welwyn Garden City

    We know it can be hard to find a builder that you can rely on. The owner, Artur Sefolli (F) has a wealth of experience and is known as one of the best builders. We pride ourselves on providing a professional, caring and high-quality service and always meet our customers’ needs. Sefolli Building is fully experienced, timekeeping, quality of work and value. We offer a full range of building services, from major rebuilds to smaller jobs such as masonry repairs Our services include: Alterations Extensions Basements Garages Brickwork Roofing Services Driveways Gardening Groundworks Excavation Foundations External Works Underpinning Concrete Screeding Flooring Painting Decorating Fences Paving Landscaping Re-pointing Soakaways Manholes Drainage If you are trying to find a builder near you, why not give us a call? Our friendly, professional team will be happy to talk through your needs and give you a free quote.

    Get in touch
  • Extension Builder in Welwyn Garden City

    We in building industry for last 17 years. We do any carpentry/ joinery works as instalation doors, windows, stares, warddribes etc. Also we do extentions, loft conversion and any refurbishment.

    Get in touch
  • Extension Builder in Welwyn Garden City

    I take pride and joy in any job I am doing, always take extra time to make sure the customer is totally satisfied and understanding, there is no job to big or too small so please don’t hesitate to get in touch - I range from groundwork’s such as installing drainage or digging footings to building extensions or garden walls/piers, also specialise in repointing. I also do a lot of landscaping work such as patios, driveways, fencing concrete shed bases etc… so please feel free to get in touch

    Get in touch
  • At Highpoint roofing and building contractors we have over 40 years of experience Collectively, we take pride in our work to ensure 100% customer satisfaction With our free no obligation quotation you will be given all the advice you need to ensure total piece of mind our goal is to meet and exceed expectations of every customer all work carried out to the highest Possible standards and at very competitive prices

    Get in touch
  • Extension Builder in Welwyn Garden City

    Stone Sa Construction can give you the help and essential advice needed to optimize the space and construction of your building project, but also provide a quality of service.

    Get in touch
  • Extension Builder in Welwyn Garden City

    We have a committed team working on a range of different projects throughout London, working in all sectors including; residential, commercial and conservation. The services that we provide are, architectural and structural 2d & 3d designs, calculation, planning permission, building control, new build, refurbishment, self contained flats, loft conversion, rear and side extension plus much more. I have over 30 years of experience in construction and have worked on a variety of different projects, from small developments to managing large scale Projects.

    Get in touch
  • Extension Builder in Welwyn Garden City

    Façade & Cladding * Façade installation across a wide range of systems and materials * High-performance rainscreen cladding systems * GRC (Glass Reinforced Concrete) façades * Metal panel façades * Terracotta rainscreen systems * Curtain walling systems * Shopfronts and glazed façades * Atriums * Canopies * Louvres and ventilation systems * Privacy screens * External façade paint refurbishment * Mastic and façade sealing works Curtain Walling Installation of curtain walling systems, including: * Schüco * ALUK * Metal Technology * Smart Systems * Jansen * Single and double-glazed curtain walling systems * Structural glazing * Structural silicone glazing Windows & Doors Supply and installation of: * Aluminium windows and doors * Steel windows and doors * PVCu windows and doors * Timber doors * Composite doors * Commercial and residential entrance doors * Glazed doors and screens * Shopfront doors and systems Glass Supply & Installation * Single and double glazing * Replacement glass * Structural glazing * Safety and toughened glass * Laminated glass * Insulating glass units (IGUs) * Glass for windows, doors, curtain walling and shopfronts Internal & Specialist Glazing * Internal glazed partitioning * Internal partitioning systems * Structural glazing * Suspended ceilings * Glazed screens and internal doors * Glass replacement and remedial works Door Automation Supply, installation, servicing and maintenance of automated door systems, including: * Automatic sliding doors * Automatic swing doors * Entrance automation systems * Door operators and controls * Sensors and associated hardware

    Get in touch
  • Extension Builder in Welwyn Garden City

    Hi I'm Lee a general builder with 25+ years experience, specialising in: * Landscaping * Groundwork’s * Brickwork * Roofing * Carpentry * Extensions/ Refurbishments * Emergency call outs I pride myself on being being highly knowledgeable and reliable, focusing on clear communication from the start to enable projects to be completed exactly what is envisioned by you, on time and within budget. Get in touch for a free no- obligation quote Regards Hill's builders

    Get in touch
  • Extension Builder in Welwyn Garden City

    All jobs undertaken, no job too small or big, 30 years experience in the building and restoration, plus roofing, Whether its hanging a picture hook or a conversion

    Get in touch
  • Extension Builder in Welwyn Garden City

    I am a reliable trustworthy local builder with a vast range of experience built up over 40 years in the industry. Able to help you in designing and fulfilling your project.

    Get in touch
  • Extension Builder in Welwyn Garden City

    Hi I'm Chris a very experienced carpenter in everything from first to second fix with over 20 years experience Please view the photo gallery to view our outstanding work!

    Get in touch
  • Extension Builder in Welwyn Garden City

    S.W.A.T Design & Build take great pride in the high quality of our service, customer retention and recommendation is key to us. We have over 30 years experience in the trade . We are able to complete a range of projects from new build industrial to full refurbishment of existing buildings , extension, loft conventions , roofing, landscaping,driveways

    Get in touch
  • Extension Builder in Welwyn Garden City

    City and guilds qualified in Bricklaying With over 19 years experience. Extensions, bricklaying, alterations, plastering, fencing, patios and general building work.

    Get in touch
  • Extension Builder in Welwyn Garden City

    We are a local building company, based in Hemel Hempstead offering design and high quality services. We have more 10 years of experience in the construction industry. We do refurbishments, extensions, loft conversions and many other building services.

    Get in touch
  • Extension Builder in Welwyn Garden City

    If your in need of some home improvements we can work with you here at Broadoak with over 30 years of experience there aren’t many situations that we haven’t experienced therefore we’d love to hear your project requirements and we can make it happen for you.We have an experienced supply chain that will work alongside us to handle your project with detail and care.We can tailor the most effective solutions to ensure any project is completed with quality and care.

    Get in touch
  • Extension Builder in Welwyn Garden City

    We are a small construction company that deal with loft conversions, extensions, structural work, refurbishing, electrical(with certificate), plumbing as well as bathroom work, kitchen fittings, wood floor, tiling, drainage, patios, driveways, outhouses, new building etc. 17 years of experience in improving customers comfort. Many satisfied customers along the years. References available upon request( some projects can be seen). We are looking forward in working with you, all work is contract based, we are fully insured for the work we do.

    Get in touch

4.6

Top rated Extension Builders

Our Extension Builders in Welwyn Garden City, are rated 4.6 out of 5 based on 16 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What types of services are offered by local extension builders in Welwyn Garden City?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Welwyn Garden City for you. They can help with a variety of tasks and projects, including:

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

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Welwyn Garden City who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Welwyn Garden City extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Welwyn Garden City?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Welwyn Garden City will charge between £16 and £42 per hour.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Welwyn Garden City extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Welwyn Garden City home extension project is likely to cost.

Find extension builders in Welwyn Garden City with MyBuilder

Hiring the right extension builder in Welwyn Garden City with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Welwyn Garden City extension builders. Once your job is live, we’ll share it with home extension builders in Welwyn Garden City who can express their interest.

Step 2: Compare different extension builders in Welwyn Garden City

When you start receiving interest, review profiles of local Welwyn Garden City extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Welwyn Garden City extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Welwyn Garden City, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

  • ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
  • Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Welwyn Garden City extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Welwyn Garden City extension builder before hiring?

Before hiring an extension builder in Welwyn Garden City or extension building company in Welwyn Garden City, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Welwyn Garden City?

An extension builder in Welwyn Garden City should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Welwyn Garden City extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Welwyn Garden City?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Welwyn Garden City extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Welwyn Garden City extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Welwyn Garden City

Can an extension builder in Welwyn Garden City help with planning permission?

Yes, many extension builders in Welwyn Garden City can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Welwyn Garden City handle everything from design to construction?

Many Welwyn Garden City extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Welwyn Garden City help with materials and finishes?

Yes, most extension builders in Welwyn Garden City can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.

Other tradespeople in Welwyn Garden City

Cities