Extension Builders in Welwyn

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.8 (14 reviews)

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Some of our top rated extension builders in Welwyn

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H & L steel and constructions private limited
No reviews yet
Extension Builder in Welwyn
I have a constructions company since 2017 April we do all type of constructions and steel works. I have a team to work with me. I have experience as a welder more than 25 years and I do have experience about extensions, plumbing, heating and all other constructions more than 10 years.
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H&S CONSTRUCTION
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Extension Builder in Welwyn
I’m a reliable and hardworking bathroom fitter with experience in installing bathrooms, showers, tiling, and general plumbing work. I take pride in delivering high-quality workmanship and making sure every job is completed to a professional standard. I work across the local area and am happy to travel for the right job. My services include bathroom installations, shower trays, tiling, silicone sealing, pipework adjustments, and general bathroom repairs. I focus on clear communication, keeping the workspace tidy, and making sure customers are happy with the finished result. Whether it’s a full bathroom renovation or a small repair, I aim to provide a reliable, honest, and efficient service.
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RK yug
No reviews yet
Extension Builder in Welwyn
We are best in renovating and refurbishing and extensions,lofts
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IMGN Interiors Ltd
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Extension Builder in Welwyn
We focus on drylining jobs, fixering ceilings and walls, any type of ceiling
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DGJ Property Maintenance
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Extension Builder in Welwyn
DGJ property maintenance provide all aspects of building works from refurbishment, conversions , extensions to all small jobs with the same 100 percent dedication and commitment.
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CONSTRUCT GROUP DESIGN & BUILD LTD
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Extension Builder in Welwyn
Construct Group | Design & Build We deliver premium extensions, loft conversions, refurbishments, and bespoke self-builds managing every stage under one roof for a seamless experience and nationwide reach Our process: Free consultation → Survey → Design → Planning → Building Regulations → Construction We handle everything from concept to completion, ensuring compliance, clarity on costs, and exceptional finish quality across every project. 📞 Book your free consultation today to discuss your plans and get clear next steps toward building approval.
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RjE property services limited
No reviews yet
Extension Builder in Welwyn
RJE Property Services Ltd, a building and construction company with over 20 years of experience in the industry. Our office is located at unit 22 Curtis Farm High Road, Fobbing, Stanford-le-Hope, Essex SS17 9JJ. Our geographical area encompasses London and the Home Counties. We specialize in refurbishing existing buildings, including extensions, refurbishments, and conversions, as well as new developments ranging from traditional builds to timber frame structures. We can provide comprehensive services for all aspects of your project, including groundworks, block and beam floors, piling foundations, drainage, timber frame construction, plumbing, electrical work, brickwork, roofing, plastering, and painting. We are currently accredited with Gold Constructionline, CSCS, and CHAS, and are a member of the Federation of Master Builders. At RJE Property Services Ltd, we prioritize customer satisfaction and believe that a high percentage of our business comes from repeat customers, referrals, and positive feedback. In accordance with the customer’s requirements, we offer a comprehensive range of services, including supply and fit, supply only, and labour only solutions.
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Mansell Construction Services Ltd
No reviews yet
Extension Builder in Welwyn
Mansell Construction Services provide a complete building service from footings to finishes. We aim to deliver high quality buildings at a competitive price to meet our clients requirements. Whether an extension or large new build project let us liaise with building control, architects and tradesmen to deliver your construction project
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Construction work
No reviews yet
Extension Builder in Welwyn
I have excellent customer reviews. 10years of experience this field. I believe in quality and promises.
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Legacy garden projects
No reviews yet
Extension Builder in Welwyn
Welcome to Legacy garden projects. A father and son business set up out of our love for creating amazing designs and making you happy with your new build. We specialise in decking areas and garden rooms, please visit our website and see our Instagram page. We are efficient and pay close attention to detail. We are able to design a build specified to your needs, and make it hassle free for your ease. Feel free to contact us for a free consultation, and we will be more than happy to help. Based in Essex.
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Mataj Building Ltd
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Extension Builder in Welwyn
I Build Your Dream
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Mand construction ltd
No reviews yet
Extension Builder in Welwyn
We deal with refurbishment of old homes and new homes fully ready including wiring plumbing heating bathroom kitchen
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Continental Master Builders Ltd
No reviews yet
Extension Builder in Welwyn
We’re Continental Master Builders Ltd. family Building Company sets up in June 2005 but we’ve been in building trades since 1998. We specialise in all types of house extensions and alterations, basement excavation and high spect interiors. We can also help with small repairs and emergency repairs around your property.
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Evolution solutions Essex
No reviews yet
Extension Builder in Welwyn
Hi Please let me introduce my company,we are a friendly small & local external & internal wall insulation company,supplying insulated renders/ewi and internal wall coverings.established for 20 years in the insulation sector and over 30 years in the plastering sector respectively. Fully insured and accredited to numerous manufacturers of renders and insulation systems. We also have a sister company supplying building works and landscaping. Our craftsmanship is of the highest standard and fairly priced,we aim to keep everyone happy,and that reflects in our pricing. We look forward to establishing a working relationship with you Warmest regards Stephen & steve
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Standard Double Glazing
No reviews yet
Extension Builder in Welwyn
Welcome to Standard double glazing profile we provide services like , Glass installation,Glass restoration& repair,Broken window,Door repair, Double Glazing Repairs,Emergency Repairs,Lock replacement,Patio Door,Triple Glazing, window Repair,composite Door, windows & Door, Lanter Roof , sky Roof, Aluminium windows & Door All work Under fully Guarantee we provide Guarantee Certificates To all customers
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Harris_construcion
New on MyBuilder
Extension Builder in Welwyn
HARRIS CONSTRUCTION Building Excellence. Creating Lasting Value. At Harris Construction, we deliver high-quality building and renovation services with a commitment to exceptional craftsmanship, reliability, and customer satisfaction. Whether you’re expanding your home, transforming your property, or undertaking a complete refurbishment, our experienced team ensures every project is completed to the highest professional standards. We understand that every property is unique, which is why we work closely with our clients from the initial consultation through to completion, providing expert advice, transparent communication, and outstanding attention to detail. Our Services * Loft Conversions * House Extensions * Basement Conversions * Full Property Refurbishments * Landscaping * General Building & Renovation * Residential & Commercial Projects
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3.8

Top rated Extension Builders

Our Extension Builders in Welwyn, are rated 3.8 out of 5 based on 14 reviews from customers like you.

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

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 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 who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Welwyn?

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

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

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 extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Welwyn home extension project is likely to cost.

Find extension builders in Welwyn with MyBuilder

Hiring the right extension builder in Welwyn 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 extension builders. Once your job is live, we’ll share it with home extension builders in Welwyn who can express their interest.

Step 2: Compare different extension builders in Welwyn

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

Step 3: Hire Welwyn extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Welwyn, 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 extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Welwyn extension builder before hiring?

Before hiring an extension builder in Welwyn or extension building company in Welwyn, 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?

An extension builder in Welwyn 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 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?

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 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 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

Can an extension builder in Welwyn help with planning permission?

Yes, many extension builders in Welwyn 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 handle everything from design to construction?

Many Welwyn 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 help with materials and finishes?

Yes, most extension builders in Welwyn 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.