Extension Builders in St Albans

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.1 (11 reviews)

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Some of our top rated extension builders in St Albans

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TEAM BBS
Rating: 5 out of 5
Extension Builder in St Albans
Boasting a wealth of knowledge over 23 years experience. Team bbs is really the only choice you need to make your dreams a reality. No job to small. Building quality into your home. Friendly, trustworthy and honesty is the key to building a great working enviroment for us all. High end workmanship, problem solving & great design ideas are what most of our customers would describe us as.
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Latest review:
Conversions - General- 3 Oct 2025
Excellent works done to date. We were pleased with their reliability, efficiency and tidiness on the job. Pleased with their works and would definitely recommend for future works.
Oakcresthomes ltd
Rating: 5 out of 5
Extension Builder in St Albans
Here at Oakcrest homes we offer a comprehensive service for all your building needs. Whether it’s renovation works, extensions or complete new builds we have a wealth of experience and up to date knowledge of building regulations and are dedicated to providing the highest level of customer service and quality workmanship.
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Latest review:
We used James and his team for our internal work and front and rear extension. After meeting with a list of builders, we found this service to be more personal and transparent. Others builders seemed to lack the communication skills to answer building related questions for those not in the industry. James however seemed to explain all details of the build to a high level, giving us reassurance. We would highly recommend Oakcrest Homes to others looking for a lovely new home design or build. The build was on time and James supported us with most decisions along the way, which included decorating, lighting etc. We plan to use the service again for future work. Thank you James and team for our lovely new home.
Sinevir Construction
Rating: 5 out of 5
Extension Builder in St Albans
Sinevir Construction Ltd is a trusted construction company based near London, proudly serving the capital and surrounding areas. We specialise in residential and commercial projects, including new builds, extensions, refurbishments, and structural works. Our team of qualified professionals is committed to: High standards of workmanship Full regulatory compliance Clear and honest communication throughout every stage of the project Whether it's a small private renovation or a complex public contract, we approach each project with care, precision, and professionalism. What sets us apart: ✅ Construction Online Gold Member ✅ Skilled and experienced workforce ✅ NEBOSH-certified site safety supervision ✅ CHAS and SSIP-accredited for health & safety standards ✅ Fully insured, giving clients peace of mind ✅ Transparent pricing and realistic scheduling ✅ Respect for architectural heritage and local communities ✅ Competitive rates without compromising on quality We believe every property deserves thoughtful construction and reliable service — and at Sinevir Construction Ltd, we proudly deliver both.
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Latest review:
Extensions- 27 Mar 2026
Ruslan was excellent at his craft. Very hard working, very clean and professional with a great attitude. Would highly recommend this company
Basil Brothers
Rating: 5 out of 5
Extension Builder in St Albans
We are an experienced team formed of two brothers who have 15 years experience in building and interior and exterior renovations. We have experience working both in the UK and across Europe. We have a good track record of quality work and we can provide UK references on request.
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Latest review:
Extensions- 14 Apr 2019
These guys have done an incredible job with my extension. They are professional and friendly and I can't fault them once in three weeks! They not only completed the job quickly, but without cutting any corners either. I wish more builders had this level of care and work ethic!
c o b building services
Rating: 5 out of 5
Extension Builder in St Albans
Over 25 year’s experiences and high standard finished quality on all works. High recommendation from my satisfied customers. Customers will have up to 10 years warranty. We have been being collaborating with Ripples Beaconsfield Bathroom , Ripples Wokingham Bathroom and Radlett Premier Bathrooms - three premium designer bathroom showrooms for over 15 years. On MyBuilder profil I update just few pictures with my work but I can provide much more pictures and information about my work. Together with my team we do - Extension - Loft extension - Converted house in flats - Plumbing / central heating system - Full bathroom refurbishment - Full kitchen refurbishment - Polish plaster / Venetian stucco - Plastering / skimming - Painting - Electric - External house insulation - Build wood house - Build summer house ( garden house ) All works is covered by 1000000 liability insurance.
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Latest review:
Bathroom Fitting- 26 Jul 2024
Catalin completely transformed both bathrooms! He listened to our requests and has come with good solutions to our problems, including recessed shelves and replacing the hot water cylinder with a combi boiler, to give us more space in the bathroom. The work was done to a very high standard and has helped us to source materials and sanitary ware. Catalin and his team has done a fabulous job! I highly recommend him!
Andrei Socaci
Rating: 5 out of 5
Extension Builder in St Albans
Reliable, responsible and self motivated person with experience in the building industry. It will be a pleasure to undertake your work.
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Latest review:
Hard Flooring- 19 Jan 2026
Great job in replacing the flooring. The floor looks good and he was efficient, reliable and cleaned up well after
U & A Builder
Rating: 4.9 out of 5
Extension Builder in St Albans
We've been ground-workers for over 16 years now and we've got lots of experience. We specialise in many aspects such as groundwork, driveways, landscape gardening, underpinning, paving, foundations, extensions, fencing and general building work. Our jobs have a warranty and also guarantee to complete all jobs to a high standard.
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Latest review:
Landscaping- 19 Mar 2024
Completely professional from start to finish. Urim and Aryam are both excellent communicators, which made a huge difference in planning the drainage for our patio, and rebuilding our front steps. We had every confidence in them from the outset and they fulfilled all our expectations. A great team!
D Halpin
Rating: 5 out of 5
Extension Builder in St Albans
Hi my name is Dan I have been bricklaying for over 20 years.i don’t mind what the job is small or big and I am responsible priced
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Latest review:
Bricklaying- 5 Jan 2026
Would thoroughly recommend Dan. He was friendly, prompt and did a great job repairing our brick wall.
Rupp Ltd
Rating: 5 out of 5
Extension Builder in St Albans
Hi im Anton Rupp , i'm a carpenter by trade with over 18 years experiences . Specializing in all aspects of carpentry , doors , skirting , kitchens including tiling electrical and decoration , architraves ,Vlux windows , bathrooms , flooring , partition walls , roofing ,staircases wardrobes . I also project manage, working close with other trades doing refurbishments from start to finish , to save you the hassle . With a very high standard , and pride , my work speaks for itself .
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Latest review:
Carpentry- 8 Dec 2017
This is the second time we have used Anton and we shall continue to hire him. He is punctual, hardworking and polite. His knowledge of numerous crafts enables him to complete a project even if it crosses several trades. His work is of an extremely high standard and reasonably priced. Thank you Anton
GpmBrickwork ltd
Rating: 5 out of 5
Extension Builder in St Albans
GpmBrickwork Ltd Extension garden walls all types of Brickwork Patios Chimney repairs New builds
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Latest review:
Bricklaying- 8 May 2026
Gordon was amazing. He came within a few days on a weekend to repair the steps as they were dangerous. He did a great job, also repairing loose brickwork on a wall at no extra charge. Very reasonable price too. I can recommend him and will definitely contact him again for brickwork jobs.
Vasile Building Services
Rating: 5 out of 5
Extension Builder in St Albans
I'm a 46 years old tradesmen from Watford. I am a hard worker, sociable, good organiser, honest. I like you to be happy with my work and I give the same whatever the contract is worth. I always respect your wishes and work with you to achieve your results. All my work is quality insured.
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Latest review:
Extensions- 28 Nov 2017
Well what an absolute pleasure! Quite simply one of the most professional tradespeople I have had the pleasure to hire. Vasile and his entire crew were all polite, professional and extremely hard working. They were onsite almost every day without fail no matter the weather, worked quickly and often long hours. Everything that we asked for was done to a premium finish, and often Vasile would suggest alternatives that would work better. They were also able to make alterations once the job was started as circumstances in the build changed from outside factors. The quality of the finish is top rate, and the end result is absolutely stunning, the work has totally transformed the house. I cannot recommend Vasile and his team highly enough, and will happily recommend them to all my friends, family, neighbors and co-workers. If we ever extend or have further need for a builder he will certainly be my first choice. To sum up, Vasile is competitively priced, trustworthy, a hard worker and highly skilled. I wish to publicly thank him for his dedication and keeping the whole experience as painless as possible!
Zakaria
Rating: 5 out of 5
Extension Builder in St Albans
Zak Design – Building Dreams, One Brick at a Time At Zak Design, we specialize in transforming your vision into reality. With years of experience in the building and construction industry, our team of skilled professionals is dedicated to delivering high-quality, durable, and aesthetically pleasing structures. Whether you're planning a new home, office space, or renovation project, we offer personalized solutions tailored to your needs and budget. Why Choose Us? Expert Craftsmanship: Our team of experienced builders ensures every project is completed with precision and attention to detail. Timely Delivery: We understand the importance of deadlines and work efficiently to complete your project on time. Client-Centered Approach: We listen to your ideas, providing expert advice and transparent communication throughout the process. Competitive Pricing: Quality doesn't have to come with a high price tag. We offer affordable building solutions without compromising on excellence. Sustainable Practices: We're committed to environmentally friendly construction practices, using sustainable materials and energy-efficient designs. Let us be your trusted partner for all your construction needs. We pride ourselves on building more than just structures – we build lasting relationships with our clients.
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Latest review:
Central Heating- 20 Feb 2025
Zak did a great job replacing old radiator with a new cast iron one. He was on time, professional and at a competitive price. Would use again.
A. D. Builders
Rating: 5 out of 5
Extension Builder in St Albans
Hi , I’m Aaron Davis of AD builders, I Have been in the building trade for 20 years. Orginally worked for my father in a family run business. I take a lot of pride in my work , references are available at any time. I'm a bricklayer by trade and ground worker. I have built many extensions over the years, and enjoy it now just as much as I did when I began. My work is of a very high quality , thanks for taking the time to read through my profile.
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Latest review:
Extensions- 23 Dec 2021
We originally asked Aaron to come look at the property before we purchased to understand the possibilities of a large extension. Since that point over a year ago Aaron has worked with us in refurbishing the existing house as well as building a large wrap around extension. The core team we had on site of Aaron, Dan, Karl are hard working, they care about what they do, and they are good fun to be around. Aaron also has a broad network across all the other trades - all of which did a great job on the project. I would certainly recommend them for any work you are considering.
SAM K&B CONSTRUCTION ltd
Rating: 5 out of 5
Extension Builder in St Albans
We refurbish homes with precision, care, and clean design. From kitchens,Bathrooms to full renovations, our work is focused, efficient, and built to last. No noise. Just quality results.
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Latest review:
Restoration & Refurbishment- 23 Oct 2024
We wanted to renovate our bathroom for a long time but struggled to find a decent quote and a trustworthy person. Finally, we found Sam, who has been a lifesaver in addressing our renovation issues from the past three years. Sam is humble, kind, and detail-oriented person. He helped us with every aspect of the bathroom work and offered excellent ideas that we incorporated. His craftsmanship ensured perfect fittings, and he suggested budget-friendly suppliers. In no time, he transformed our bathroom into a stunning suite. He even went the extra mile by fixing our other bathroom and converting an unused storage space into a beautiful utility room. We feel so lucky to have Sam and his team at the right moment. I would definitely love to offer SAM more work in future and he has become one among our family members now. :) IF ANYONE LOOKING FOR ANY RENOVATION WORK, PLEASE DONT LOOK BEYOND SAM AND HIS TEAM, YOU WONT BE DISSAPPOINTED AT ALL, HE IS THE BEST IN THE MARKET!!
Smart Constructors Ltd
Rating: 5 out of 5
Extension Builder in St Albans
We represent a new construction company with many fields of activity, such as meintenance, cleaning, extensions a.s.o. We are more than happy to tackle any chalange.
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Latest review:
Handyman- 9 Aug 2019
Very happy, good (fair not cheap) price. Adrian contacted me, arranged to come quite quickly, efficient and completed the job in good time... left site nice and tidy. Would recommend 😀 Thanks Adrian
C&C Construction
Rating: 4.9 out of 5
Extension Builder in St Albans
Hello, My name is Billy, I’m a Chartered Institute Builder & AssocRICS Surveyor I also carry out project management and JCT Contract administration. I provide my clients with only the best quality workmanship and standards. Turn key service available, 20+ years Experience, A builder with a real passion for what I do. We treat your property as our own, We are highly qualified professionals with the qualifications and skills to do the job with the least hassle. PLEASE READ MY REVIEWS !!😊
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Latest review:
Extensions- 19 Jul 2018
We hired C&C Construction managed by Billy Clarke to construct, in my parents house, a rear kitchen extension, new d/s toilet conversion, new kitchen build, new front porch, new external walls, gate and patio to the rear, all drainage, water supply & plumbing, electrics, gas fitting, tiling, finishes and decoration. Found Billy and the team extremely hard working, polite, diligent and committed to a high quality finish, but at an affordable price. During the build they were able to accommodate my parents remaining living in the house and built up a great relationship with my Mum and Dad. They encountered problems along the way as the house is from the 1930s and they had some dubious previous building standards to contend with, but dealt with them all as they went along. Very high quality on external render, and the new kitchen build and the new patio area is a delight. Mum and Dad, the clients, are delighted with the finished product and overall I would have no hesitation in recommending Billy and the team for any future works by C&C. Regards Terry

3.1

Top rated Extension Builders

Our Extension Builders in St Albans, are rated 3.1 out of 5 based on 11 reviews from customers like you.

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

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 St Albans 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 St Albans who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in St Albans?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in St Albans 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 St Albans extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your St Albans home extension project is likely to cost.

Find extension builders in St Albans with MyBuilder

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

Step 2: Compare different extension builders in St Albans

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

Step 3: Hire St Albans extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in St Albans, 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.

St Albans extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a St Albans extension builder before hiring?

Before hiring an extension builder in St Albans or extension building company in St Albans, 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 St Albans?

An extension builder in St Albans 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 St Albans 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 St Albans?

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 St Albans 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 St Albans 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 St Albans

Can an extension builder in St Albans help with planning permission?

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

Many St Albans 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 St Albans help with materials and finishes?

Yes, most extension builders in St Albans 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.