Extension Builders in Welwyn Garden City

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 Garden City

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Thiara
No reviews yet
Extension Builder in Welwyn Garden City
Be a good gud person and we do all kind of job such as loft extension door bathroom electric plumbing tiling kitchen everything
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Verma
No reviews yet
Extension Builder in Welwyn Garden City
Skimming plaster, K rendering, Sand plaster, tile work , garden work, driveway work, and any type house renovation and building contract
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Buildswell ltd
Rating: 5 out of 5
Extension Builder in Welwyn Garden City
my name is sehaj the main contractor of buildswell ltd.We are a full facilities management and installation company,If you are thinking of renovating your home,building an extension, or changing your roof. Sehaj from buildswell has a local and trusted construction business to provide maintenance and building services of the highest standard at competitive prices. Very friendly and professional
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Latest review:
Extensions- 20 Jan 2021
Trusted person good quality extension with no delays
H & A Building Construction
No reviews yet
Extension Builder in Welwyn Garden City
As a Building Constriction company, Our dedicated team is here to make your vision into reality. We are on hand to help, guide and assist you wherever possible and have provided a whole host from Architects and Building Controllers to support you with frequently asked questions, as you get prepared to make your vision into reality.
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Ahr construction Ltd
No reviews yet
Extension Builder in Welwyn Garden City
AHR Construction Ltd is a limited company that was incorporated in 2020. Their registered office is located at 183 Aubrey Road, Small Heath, Birmingham, England, B10 9DJ. We operate around m25 in greater London. We specialise in air-conditioning building freezer rooms and chiller rooms. We design build new restaurant. We have a competent team to take on any construction projects. We design and build bespoke bathrooms. Our specialist team helps you design and build your dream home.
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MKL home
No reviews yet
Extension Builder in Welwyn Garden City
As a dynamic family team, we bring years of experience and craftsmanship to your home improvement projects. With a skilled and experienced bricklayer, we deliver top-quality masonry work — from strong garden walls and decorative brickwork to patios, pathways, paving and slabs. We also specialise in fence installation and repair, ensuring durable, secure, and long-lasting results for any outdoor space. In addition to construction, we offer post-building cleaning, making sure your property is left clean, tidy, and ready to use after any project. We approach every job with precision and attention to detail. For us, this isn’t just work — it’s our passion.
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Manmeet construction and design
No reviews yet
Extension Builder in Welwyn Garden City
“Resourceful builder with 5 years of experience in roofing, tiling, bathrooms, kitchens, floor fitting, painting, and garden constructions. Skilled in multi‑trade tasks from renovation to decoration. Known for precision, reliability, and delivering high‑quality workmanship under tight schedules.”
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Guarded Properties
Rating: 4.7 out of 5
Extension Builder in Welwyn Garden City
All works covered by £1m Public Liability All Building Works New Builds Extensions Refurbishments Outbuildings Roofing Bricklaying Electrics Carpentry GRP Roofing Asbestos Roofs Flooring Fascias Guttering Plastering Tiling Painting Decorating Ground Works Patios & Paving Fencing Carpeting Liaising with Building Control & Planning Your one stop construction shop!! High quality works Competitively priced Will beat any formal quotation on like for like basis!
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Latest review:
Extensions- 4 Jun 2022
Danny designed and built us a garden room to fit a challenging space at the bottom of our garden. His communication from start to finish was excellent, and he did an brilliant job on the room, inside and out. I would recommend Danny for any job, big or small.
Dong
No reviews yet
Extension Builder in Welwyn Garden City
I have been in the decoration industry for twenty years and can handle all kinds of repairs, expansions and renovations of houses.
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Ap Home Improvement Ltd
No reviews yet
Extension Builder in Welwyn Garden City
Refurbishment,house extension,loft conversion,kitchen,bathroom,flooring, carpet,double glazing,plumbing,heating electric.garden,driveways.garage conversion All type of building work
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BESJON CONSTRUCTION LTD
No reviews yet
Extension Builder in Welwyn Garden City
Highly experienced and approved by companies such as Wren Kitchens, Wickes etc, we proudly take on and deliver high quality work to our clients. Our proficiency extends to the successful completion of extension projects and loft conversions with many additional trades, showcasing our commitment to quality and innovation. At BESJON, we prioritize customer satisfaction and provide exceptional customer service. Our team is skilled and known for their friendliness, creating a positive and collaborative environment throughout the construction process. Choose BESJON Construction LTD for a seamless and reliable construction experience.
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London Decorations and Refurbishment Ltd
New on MyBuilder
Extension Builder in Welwyn Garden City
London Decorations and Refurbishment Ltd Building Better Homes Across London ABOUT US At London Decorations & Renovations Ltd, we specialise in high-quality home improvements designed to transform properties into modern, functional, and beautiful living spaces. With experience across residential construction, extensions, refurbishments, and bespoke renovations, we deliver projects with professionalism, transparency, and attention to detail from start to finish. Whether you are planning a house extension, full refurbishment, loft conversion, or interior upgrade, our team is committed to providing reliable workmanship and exceptional customer service.
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Sardar Ji Construction Ltd
No reviews yet
Extension Builder in Welwyn Garden City
Hello I am sadar Ji Construction. I take pride in my work and strive to deliver reliable and high quality service to every customer. I am detail oriented , punctual and always ready to go extra mile to ensure great results. We have skilled workers in are team and have a experience of 18 to 20 years .In new build house , roofing refurbishing loft conversion ,bathrooms , kitchen and electric plumbing ,out house , And I always focus on customer satisfaction and always aim to deliver the best results Thanks
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MS Builder
No reviews yet
Extension Builder in Welwyn Garden City
I am good in decorating and painting things
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1st click design & build ltd
No reviews yet
Extension Builder in Welwyn Garden City
1ST CLICK DESIGN & BUILD LTD construction company your right choice to complete your Dream home .We have more than 20 years experience in building work .We do all type of building work New build ,extensions ,lofts conversions ,pitch and flat roofs, house refurbishment work, driveways & patios ,installation kitchen & bedrooms made to measure ,bathrooms ,all type of carpentry work etc .
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Day Dream Construction Ltd.
No reviews yet
Extension Builder in Welwyn Garden City
We are a professional group of companies who do all building work undertaken.
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3.8

Top rated Extension Builders

Our Extension Builders in Welwyn Garden City, 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 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.

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 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.