Extension Builders in Welwyn

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.7 (13 reviews)

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Some of our top rated extension builders in Welwyn

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Dragos Gherasim
No reviews yet
Extension Builder in Welwyn
I am a groundworker with over 7 years of experience in the field, I perform house foundations, drainage, Block and beam, slabs, Krebs, drive way, garden landscaping,
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Denis
Rating: 5 out of 5
Extension Builder in Welwyn
D
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Latest review:
Painting & Decorating- 5 Jul 2026
Good work
Nobel LUX LTD
No reviews yet
Extension Builder in Welwyn
We have 10 years experience in fitting kitchen and furniture for brands as Wren kitchen, Schimdt and other brands furniture and kitchen. As we are doing any extra jobs . We are doing most of the building works. We doing as well extension and refurbishment of your dream house .
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Trance Construction
No reviews yet
Extension Builder in Welwyn
Trance Construction is a full building service to produce the highest quality using qualified and professional tradesmen, we undertake almost all building projects. I Aaron (owner) personally hold 18years experience within the trade. Carpentry main trade. Work not carried out by myself is then sub contracted to professionals that I have working with me to complete you the clients dreams into reality. If we're not satisfied then why should you be.
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Musta
No reviews yet
Extension Builder in Welwyn
MUSTA Building Services Ltd will provide an experienced team who'll see it right through from the design stage to completion. Whether it's your bathroom, kitchen or a whole house, we offer full building, decorating and plumbing services.
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Flamur Hoda
No reviews yet
Extension Builder in Welwyn
I have more than 15 years experience in residential and commericial construction, House building, extension and refurbishment and the last completed project was house extension, garden refurbishment, painting and decorating. All aspects of building work undertaken with experience of the following: • bricklaying • plastering • painting • roofing • flooring • Tiling • garden fencing • pavement and • House renovation and extension Can create a team of experienced professional working together to get project completed. Hire more workers for bigger projects and other professionals as and when required.
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Adam Hicks
No reviews yet
Extension Builder in Welwyn
All kinds of construction work from tiling. Walling,kitchen,bathrooms,Bricklaying etc.
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M&J
No reviews yet
Extension Builder in Welwyn
I am 29 years old. I really like working in construction. I have been working for 5 years in a company and now I want to do something for myself because I believe that I have all the necessary qualities and I want to start something for myself.
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Prime Build Develop Ltd
No reviews yet
Extension Builder in Welwyn
We are a newly registered Ltd company with 20 years of experience working as subcontractors. Some of our works can be seen in our portfolio. Our latest project is the 2 room and bathroom loft conversion. We do renovation of offices and house interiors, bathroom & kitchen installation, construction of pergolas and terraces, garden houses, extensions, loft conversions. We are based in Essex but we also travel around. Feel free to ask questions and we will provide an approximate quote.
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YBD Limited
No reviews yet
Extension Builder in Welwyn
Welcome to our Architectural and development solutions team of professionals.We specialize in: 1. Architectural & Development Solutions – From concept to completion, we provide innovative and functional designs tailored to your needs. 2. Renovations – Transform your existing space with expert remodeling and upgrades, enhancing both aesthetics and functionality. 3. New Building – We bring your vision to life with high-quality construction, ensuring durability, efficiency, and modern design.
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Groundwork and Landscaping Services Ltd
Rating: 5 out of 5
Extension Builder in Welwyn
Local professional builders with a vast experience installing fencing, paving and general groundwork, we offer competitive prices and good quality finish. We specialise in all aspects of gardening, landscaping and groundwork, we strive to make each garden unique and listen to our clients' individual wishes and requirements. We strive to create a space you can really enjoy.
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Latest review:
Landscaping- 25 Mar 2022
Fatmir was very professional and delivered a high standard of work at a fair price. Reliable, on time and listened to what I wanted. He communicated throughout the job. I am delighted with my fencing and patio he provided. Very trust worthy professional who values is customer and work. Highly recommend and have passed his contact to my neighbour and friend. Thanks Fatmir
Mprgroundworksltd
No reviews yet
Extension Builder in Welwyn
Hi my names is michael from MPR groundworks we are a groundwork company that can handle big or small jobs We have only been going for 2 years In which I have completed some big jobs I’m an honest builder who likes to help people because word of mouth and reputation is the most important part of being a builder I have experience in building trade since 1996 Have worked for large companies Just wanted to try to go on my own
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Niall paine
No reviews yet
Extension Builder in Welwyn
I have been in the bricklaying trade for 17 years, fully qualified nvq 2. Work to a high standard, have worked on all types of bricklaying jobs from sites with multiple houses to small garden walls and repointing. Reliable and hardworking.
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C&S Builders
No reviews yet
Extension Builder in Welwyn
C&S Building is a reputable construction company that offers a wide range of building services. With over 20 years of experience, they have established themselves as experts in the field. As a family-run business, they prioritize customer satisfaction and provide excellent solutions for all construction needs
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Max Building Ltd
No reviews yet
Extension Builder in Welwyn
Life warranty
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New Deal Construction Ltd
No reviews yet
Extension Builder in Welwyn
Since our inception in the year 2001, we have successfully completed a number of residential, institutional, and commercial projects. Our vision is to become an ultimate construction company in the UK that handles all construction needs from planning to execution. We believe in giving a top-notch quality in a timely manner and hence can deliver one hundred per cent trustworthy services to our clients so that they can attain their share of happiness.
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3.7

Top rated Extension Builders

Our Extension Builders in Welwyn, are rated 3.7 out of 5 based on 13 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.