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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Atlant Construction Ltd
Rating: 5 out of 5
Extension Builder in Welwyn
ATLANT is part of a group of construction companies working in the High-End residential sector throughout London & the South East. Our projects include: New-Build Bespoke Houses / Small Developments / New Basements / Large Residential Extensions / Significant Refurbishments / with a value from £100k up to £2 million -- Our main aim at ATLANT is to combine the creativity of design with the practicality of construction to build unique and special homes.
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Latest review:
New Builds- 22 Jan 2021
Fantastic job on time and well within budget
Rares Cristian Lupu
Rating: 5 out of 5
Extension Builder in Welwyn
I am a sole trader working for myself for more than 10 years. Family experience over 35 years. I deliver all services from painting, dexorating, bathrooms, kitchens, full house builds, loft conversions, rear / side extensions, landscaping, plastering and plumbing/electric. Reliable and respectful to all my clients!
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Latest review:
had an excellent experience working with Cristian on my bathroom project. From start to finish, his work exceeded all expectations. Cristian was professional, attentive to my needs, and incredibly detail-oriented. His craftsmanship and commitment to quality were evident in every aspect of the project, and he transformed the space beautifully. He kept communication clear and made sure everything was completed on time and according to my vision. I am thrilled with the results and highly recommend his services.
VM Construction Pvt Ltd
Rating: 5 out of 5
Extension Builder in Welwyn
VM Construction Pvt Ltd offers clients a full set of specialised services to refurbish, repair and maintain your property both inside and outside. Our aim has always been to provide good quality to each of our clients in services delivered and finished product. We accomplish this through a dedicated, professional workforce and an approach which exceeds customer expectations. We specialise in: Roof and loft conversion Extension New builds Refurbishment Plumbing and electric Plastering
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Latest review:
Extensions- 25 Apr 2020
Financial restrictions meant we had to change from an extension to simply improving the existing house. I gave Vlad a call on a friday and his army was ready to start the very next Monday morning. All would have been finished in less than 2 weeks but the unexpected Covid-19 lockdown on 23rd March meant that supplies were harder to get. Very pleased with our brand new house. Good job done on new Electrics, Kitchen, Bathroom and plumbing and he even helped fix our D.I.Y furniture at the end. Will definitely use VM on our next project.
Future Home Constructions
Rating: 5 out of 5
Extension Builder in Welwyn
Future Home Constructions Ltd is a company that understands and appreciates every client’s uniqueness. We always work hand to hand with our clients to make sure that the final result is how you imagine. We specialize in: extensions, brickwork, plumbing, and much more. However, we do appreciate that you might not know if your project will meet your budget, so we offer a free of charge estimate on your next project. You don’t wait for your dreams to happen, you call us and we make them happen.
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Latest review:
Bricklaying- 25 May 2022
Top notch builders! We used Future Home Construction to build our large wrapround extension. They are a reliable family-owned company who showed up on time, worked hard, sometimes working 6 days a week including Bank Holidays. The team worked with great care and professionalism and were very informative, walking me through the process and offering me solutions to problems. We have been very impressed with the high standard of work carried out on our house and are delighted with the result. We would recommend Future Home Construction to anyone considering having work done to their house.
Lotus Trinity Limited
No reviews yet
Extension Builder in Welwyn
At Lotus Trinity we deliver state of art workmanship, exquisite customer service, quick turnarounds and competitive prices with efficiency and pride. Our friendly project managers will work one-to-one with you to ensure that each project is completed to your highest satisfaction. Founded by Sabin, who has over 20 years experience of working in the construction industry, along with our project managers with a similar level of expertise, we have knowledge and experience of the industry and nearly every niche within it. We strive to make the building process as stress free for our clients as possible throughout transparency and by keeping them up to date on everything that we do while delivering the highest quality work. Constant communication and quality control. Our clients projects are our business cards.
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Jagdeep Singh
Rating: 5 out of 5
Extension Builder in Welwyn
Hi,contact us for any type of building work
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Latest review:
Extensions- 8 Dec 2023
I recently had the pleasure of accepting Jagdeep on a substantial renovation project. Initially, I was a bit apprehensive as there were no existing reviews to gauge his work. However, after seeing some of his previous projects, I decided to take a leap of faith - and it turned out to be the best decision I've ever made. Jagdeep's approach to our project, which started merely as a rear extension and shower room, was nothing short of exceptional. His remarkable craftsmanship and attention to detail soon convinced me and my wife to extend the scope to a full renovation. Throughout the process, Jagdeep and his team displayed an extraordinary level of skill, professionalism, hard work as well as trust (very rare these days). No task was too challenging, and his willingness to prioritise our needs and provide thoughtful advice was truly comforting. It's rare to find a builder with such dedication and expertise. Jagdeep is undoubtedly one of the best builders I have encountered. My heartfelt thanks to Jagdeep and his team for their outstanding work. Rest assured, for any future projects, he will be the first person I call. Thank you, Jagdeep, for turning our vision into reality, which more than exceeded our expectations!
Bpm Contractors Ltd
No reviews yet
Extension Builder in Welwyn
BPM contractors are a reputable company, known for our cost-effective prices. Our company offers both competitive pricing and flexibility to the needs of our customers. Some of our services include:General Maintenance,Refurbishment,PlumbingElectrical,Painting,Decorating,Carpentry,Flooring,Windows.
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Inspired Creations London Ltd
Rating: 5 out of 5
Extension Builder in Welwyn
We undertake residential and general construction projects including extensions, loft conversions and renovations. We also manufacture and install bespoke kitchens, bedroom and all kinds of fitted furniture.
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Latest review:
Extensions- 8 Dec 2021
Sukh and his team are tidy, experienced and skilled. The standard of work throughout the house is excellent. Will be keeping their contact details for any future projects. Would definitely recommend.
Alket Hysa
No reviews yet
Extension Builder in Welwyn
My name is Alket. With 15 years of hands-on experience in the plastering, rendering and screeding industry i have honed my skills to deliver exceptional quality. Plastering:Expertise in applying various types of plaster,includin lime,gypsum and cement, to create smooth and durable finishes. Rendering:Proficient in different rendering techniques,including traditional sand and cement render, monochouche and acrylic render system. Screeding:Skilled in laying both traditional sand and cement screed and modern liquid screed to achieve level floors with precision.
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Vertex Projects
Rating: 5 out of 5
Extension Builder in Welwyn
Vertex Projects is a professional and trusted construction partner dedicated to bringing your vision to life. We specialise in a comprehensive range of services, including painting and decorating, building extensions, expert demolition, and plastering. Our expertise also extends to new fencing and the custom construction of bespoke balconies. At Vertex Projects, we pride ourselves on being a respectful team that treats every home and site with care, ensuring high-quality craftsmanship and a seamless experience from start to finish.
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Latest review:
Hard Flooring- 7 Jul 2026
Straight forward process with no hiden costs. The work was completed to a good quality with the new flooring in the garden outhouse and the waste removed. Will hire again in the future.
Valentin
Rating: 5 out of 5
Extension Builder in Welwyn
Extension, plastering, tiling, flooring, plumbing, electric.....General contractor
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Latest review:
Bathroom Fitting- 1 Jun 2024
Valentin is a very professional and well experienced plumber and electrician. Hi did amazing job.Changed the bath and the panels in one day!
Denis & Kelvin LTD
Rating: 5 out of 5
Extension Builder in Welwyn
Hello im Fredi, I am a experieced builder and would like to deliver quality work to all my customers.
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Latest review:
Restoration & Refurbishment- 26 May 2024
Great work, punctual and informative. Would hire again for sure.
Canham Building Services Ltd
Rating: 4.2 out of 5
Extension Builder in Welwyn
We are a building company with a strong carpentry background. We can take on all aspects of building and carpentry from door repairs and hanging to full refurbishment projects. We are also proficient in outdoor buildings, for example, summer houses, sheds and timber or composite decking. We can also provide a full shop fitting and refurbishment service.
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Latest review:
Decking- 31 May 2024
Firstly they came on time and job was finished on time, I would have given 4 1/2 stars overall. There was a couple of things I would have given 4 1/2 stars for and a mostly I would have given 5 stars. They was always on time every morning and was nice and polite. Overall I'm satisfied and looking forward to completing the rest myself. I had so many nice builders come to look and price the work, it was hard to choose. I am very happy with the outcome of the work.
ALTROBUILDERS LTD
No reviews yet
Extension Builder in Welwyn
Whether you're looking to build your dream home, renovate a commercial space, or undertake a large-scale construction project, we have the expertise and experience to exceed your expectations. With more than 10 years of experience in the industry, we complete every project professionally, on time and in collaboration with the needs and ideas of property owners
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Kasa
Rating: 5 out of 5
Extension Builder in Welwyn
Kasa Building services , it’s proud to offer a wide range of services from new build to loft&extensions , refurbishments , plumbing and electric,carpentry and loads more … With as quality matters
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Latest review:
Plumbing- 3 Apr 2023
Kasa was absolutely fantastic, nothing was too much hassle as we had to make changes during the job. We have now found a plumber, we can use on all future projects. Big thank you Kasa from myself and Aiste.
Alireza
No reviews yet
Extension Builder in Welwyn
Good job
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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.