Extension Builders in St Albans

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

Easily find verified St Albans Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in St Albans.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in St Albans

1963 Results

Sort by:

rawstraw realty ltd
Sponsored
No reviews yet
Extension Builder in St Albans
Hello We are a team of professional build workers with expertise in Electrics, plumbing, ground works, landscaping and much more
Get in touch
Zenstruction
Rating: 5 out of 5
Extension Builder in St Albans
Established in 2005, we are a trusted building company with extensive experience in all aspects of construction, from new builds to fascia and gutter installations. Known for delivering high-quality projects on time and within budget, we maintain the highest standards of workmanship, safety, and reliability. Our expertise spans a wide range of services, ensuring that each project is completed to exceptional standards, meeting both client expectations and industry regulations.
Get in touch
Latest review:
Extensions- 3 Sep 2018
Zen has helped transform our home, we’ve drawn a lot of confidence from his considered approach and thorough work ethic. He’s so far addressed the cause of cracks to exterior walls of our property and has provided lasting solutions. We also asked him to plaster our hallway and update the banisters for us, Zen has done a great job of reinforcing the strength of the original features whilst retaining the property’s character. Very good with pets too. Looking forward to the next project.
Hunbuild Ltd
Rating: 5 out of 5
Extension Builder in St Albans
With over 25 years of experience in construction Open Plan Solutions is regarded as one of the most successful companies based in St. Albans and the surrounding counties working on both private and commercial property development. Open Plan Solutions provides a successful track record within a safe environment for the community it works in. Our speciality in providing construction needs makes us the first choice amongst customers looking for quality services. We strive to deliver all construction on time and to budget – and we consistently do, which is why our client base has continued to grow and we consider ourselves to be the number one building and construction experts covering St. Albans, Hertfordshire and surrounding areas.
Get in touch
Latest review:
Restoration & Refurbishment- 20 May 2026
Excellent service from a very professional team. They removed two chimney breasts for us, turned up right on time, and finished the work to a very good standard. They also did a great job of protecting the house from dust while working. We are very happy with the final result and would definitely recommend them.
KBS Construction Services
Rating: 5 out of 5
Extension Builder in St Albans
In our offer we have a wide range of construction services such as: • Extensions • Conversions • Renovations • Kitchens • Bathrooms-Washrooms • Property Maintenance • Handyman Service • Refurbishment • Brick work etc • Specialist Stone, tiling etc. • Painting & Decorating • Window fitting • Architecture Steel Fixing • Under floor Heating and many more
Get in touch
Latest review:
Restoration & Refurbishment- 8 Jun 2020
Kamil and his tiler have been excellent. He was able to do the work at short notice, he always turned up on time and stuck to his quote. The quality of the work is excellent with special mention of the tiling which would probably win a competition! Kamil remedied minor problems that occurred as the work was in progress ensuring that the completed work was first rate. I will certainly use Kamil again and have no hesitation in recommending him to others.
Ferrity Construction & Home Improvements
Rating: 5 out of 5
Extension Builder in St Albans
Ferrity Construction is a Hertfordshire-based construction company delivering high-quality workmanship across a wide range of projects. We pride ourselves on a professional approach, attention to detail, and completing every project to the highest standards. Our areas of expertise include: - Insulation and thermal efficiency works - Retrofit solutions - Full home refurbishments - External Wall Insulation (EWI) - Roofing - Rendering - General building services - Patios - Electrics - Plumbing - Maintenance and repairs
Get in touch
Latest review:
Restoration & Refurbishment- 27 Mar 2026
Excellent job to board out garage and lay flooring. Very professional, good value, highly recommended.
SPBW Operations
Rating: 5 out of 5
Extension Builder in St Albans
Welcome to BRAXMOON ! (mybuilder doesnt allow to change the name they ask to remove and open new account but I didn't want to do as all fedback are gone and I need to ask my previous customer to right again)😀 With 16 years of experience in the construction industry, we pride ourselves on delivering exceptional quality and craftsmanship in every project we undertake. We love make a open plan by putting a steel beams / we love it. From residential renovations to commercial needs, our team (NOT subcontractors) of skilled professionals is dedicated to exceeding our clients' expectations. We prioritize clear communication, attention to detail, and timely completion to ensure a seamless construction process from start to finish.No hidden cost fully transparent !! CLICK SHORTLIST for reliability, integrity, and superior results. Get in touch today to discuss your project needs!" 😉 How we work: 1. Asking for planning permision sending a drawings by email 2.Site visit 3.Quote sent in 48h from meeting 4.Signing a contract 5.Planning starting day 6.Helping/advice on purchases .... Happy smiles & handshake Kind Regards Mark
Get in touch
Latest review:
Bathroom Fitting- 14 Jul 2025
The team were amazing from start to finish and we have agreed further jobs thanks to the high quality of the work.
Ermir
Rating: 5 out of 5
Extension Builder in St Albans
Prela construction Ltd Installation of OAK BUILDINGS Maintenance Epdm roof membrane certified. Carpentery Roofing and gutters Drywall&plastering Electrics and more
Get in touch
Latest review:
Cleaning Services (domestic and commercial/office)- 6 Jun 2026
Ermir and Carol were fantastic - their cleaning team left our property spotless. We would certainly recommend them and use them again.
j preston builders ltd
Rating: 4.9 out of 5
Extension Builder in St Albans
CLEAN AND TIDY BUILDERS,OVER 20 YEARS IN THE TRADE ,FIRST CLASS WORKMANSHIP ,WORKING IN AND AROUND ST ALBANS AREA CHECKATRADE MEMBERS
Get in touch
Latest review:
Conversions - General- 28 Mar 2022
Jeff did a fantastic job converting our garage into a dining room. Jeff is very organized, punctual, extremely skilled, knowledgeable, and very approachable. He took care of everything and completed the whole work in 2 weeks to a very high standard. We are extremely pleased with our new Living-Dining area. The dining room does not look like it was a garage before and feels like it has always been there. Jeff made sure the whole area looks like it is one big room rather than an add-on.
Bathroom fitter,Handyman,Plumber,Electrician
Rating: 5 out of 5
Extension Builder in St Albans
We are a small team of multiskilled traders,specialised in kitchen and bathroom refurbishment as well as any other building work Reliable,tidy and reasonable priced who takes pride in their work Thank you
Get in touch
Latest review:
Restoration & Refurbishment- 15 May 2026
Daniel and his team were excellent. Always on time, polite, and flexible. They did a fantastic job with this garage conversion & painting. The end result looks great. Would highly recommend
Ambs Eco Solutions LTD
Rating: 5 out of 5
Extension Builder in St Albans
Here at AMBS ECO solutions, we offer a great service to clients, with skilled qualified tradesmen around me and pride myself on my customer relationship and quality of work All with an eye on carbon neutral materials and eco friendly building methods. We supply and fit ASHP, Battery packs and Solar panels as well as building anything from new builds to basements to show rooms and yoga studios!
Get in touch
Latest review:
I have no hesitation in recommending Andy Mills and his team. He undertook a complete house refurbishment project including the conversion of cellar space into basement living space and installation of new kitchen. He kept me informed of progress throughout the project and used his extensive experience throughout the extensive project to deliver the project on-time and on-budget. Job well done.
JLita Construction
Rating: 4.7 out of 5
Extension Builder in St Albans
J Lita Ltd Building Service is a business established in 2016. We have more than 10 years' experience in providing building services around North London, London, St Albans, Watford, Luton, Amersham, Aylesbury. We specialise in a wide range of services across all aspects of house refurbishment, construction, including house remodels, renovations, extensions, and more, ensuring that we can handle every aspect of your project from start to finish. We provide expert solutions for projects of all sizes. Our team of professionals is highly skilled and dedicated to delivering exceptional results on every project. We have the knowledge and expertise to get the job done right the first time. At J Lita Ltd, we believe that communication is key to the success of any project. That's why we work closely with our clients to understand their needs and provide customized solutions to meet their unique requirements. We are committed to delivering projects on time, within budget, and most importantly to your satisfaction. We look forward to helping you with your projects. Estimates/quotes are available on request, please don't hesitate to give us a call anytime.
Get in touch
Latest review:
Extensions- 2 Aug 2023
JLita construction were hired after a competitive quote was agreed to carry out work on my kitchen extension project last year. Prompt and dependable Jetmir’s team worked productive long hours with a clear understanding of my wants and requirements. Where it was possible to accommodate they did. Any remedial work was quickly picked up and completed in good time to the required specifications. After completion of work each day, the space was swept and tidied and the space made as usable as possible. I am extremely happy with the work carried out and the attention to detail applied by Jetmir and his team and would, (and have already) happily recommend JLita Construction for any building works. More than satisfied. Many thanks Jetmir and team. Scott
Enea Group LTD
Rating: 4.9 out of 5
Extension Builder in St Albans
Enea Group LTD has undertaken all forms of design and construction work, from Refurbishments, House Extensions and Loft Conversions, to remodelling also for the New Home Builds. In our team we offer a wealth of experience and extensive construction knowledge.
Get in touch
Latest review:
Groundwork & Foundations- 8 Oct 2024
Great service.have asked them to come back for future jobs
UK NAMA Constructions Ltd
Rating: 5 out of 5
Extension Builder in St Albans
Garden Fencing, Garden Decking, Artificial Grass, Wooden Floor Laminating, Decorating, Partitions.
Get in touch
Latest review:
Carpentry- 28 Jan 2026
Ali did an exceptional job designing and building our staircase, and I couldn’t be happier with the result. From start to finish, he was a complete gentleman — polite, respectful, and a pleasure to deal with. Ali is clearly a true specialist at what he does. His knowledge, attention to detail, and confidence in his craft really stood out. He was able to design and install the entire staircase in just one day, which was genuinely impressive given the quality of the finish. He worked efficiently, kept the area tidy, and took great pride in his work. It’s rare to find someone who combines skill, professionalism, and good nature so well. I would highly recommend Ali to anyone looking for a high-quality staircase installed by a true expert.
Philip J Pulzer
Rating: 4.7 out of 5
Extension Builder in St Albans
As a design and build contractor, we will produce drawing for both planning approval and building regulation. We will then provide a detailed estimate of building costs. If we do win the building co tract then all architectural design cost will be free of charge.
Get in touch
Latest review:
Extensions- 11 Feb 2019
Completed job on expected timeline and assisted when challenges came up
Johnstones Property Services
Rating: 4.4 out of 5
Extension Builder in St Albans
25 years experience in the building trade. Running my own business for 15 years. More than just decorators; I have a team who can complete a variety of building related tasks. We specialise in complete property refurbishments and are a proud member of the The Guild of Mastercraftsman.
Get in touch
Latest review:
Extensions- 27 May 2021
Very professional service. Extremely happy with the finished result. Polite and friendly builders and admin team. Would definitely recommend and I'll be using these guys again in the future. Thanks again.
SCARBO DESIGN & BUILD ltd
Rating: 5 out of 5
Extension Builder in St Albans
SCARBO DESIGN AND BUILD is a family run business working within the construction industry with over 100 years combined experience.
Get in touch
Latest review:
We had a ground floor extension. We were extremely happy with the work completed by Charley. He was reliable, trustworthy and easy to work with throughout the time the extension was being completed. He kept within budget. We absolutely love our new social space. Would highly recommend him to anyone.
Oliver Building Services Limited
Rating: 4.8 out of 5
Extension Builder in St Albans
About Oliver Building Services Ltd, have been fitting kitchen and bathrooms for many years. We pride ourselves on being the go-to bathroom fitters for discerning . We specialise in all bathroom fitting and design services including: Please feel free to get in contact and we will be more than happy to come round to quote •Extension •Kitchen •Bathroom •Installation •Showers •Plumbing •Tiling •Plastering •Electrical •Painting & Decorating • Loft conversion •Roofing
Get in touch
Latest review:
Kitchen Fitting- 27 Nov 2024
We decided to fit a new kitchen in our tenanted house all done remotely via Australia. We are very pleased with the final kitchen and credit to Oliver for staying committed to the job. He communicated well throughout the process and as a result there were no surprises. This was not an easy process as we were dealing with a difficult tenant that we were trying to remove at the time. As a result the new kitchen was fitted but Oliver had to come back months later to finish the job. I know this was frustrating for him but with mutual respect and trust we got the job finished and I thank him for his patience and honesty. Would recommend his services.

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.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.