Extension Builders in St Austell

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Some of our top rated extension builders in St Austell

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TP Builders
Rating: 5 out of 5
Extension Builder in St Austell
We are a family run company . Can do anything from changing a light bulb to building a property. All property maintenance inside and out undertaken.
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Latest review:
Bricklaying- 19 Feb 2020
I would highly recommend TP Builders. They arrived early in the morning and worked non stop. We were really happy with the completed job and wouldn't hesitate to use this company in the future.
Jasonmcilroy plumbing&heating
Rating: 4.8 out of 5
Extension Builder in St Austell
Domestic plumber with 10 years experience. Confident and competent at completing both large and small plumbing work. Can work just as well independently as I can being a part of a larger workforce. Based around the Truro area but willing to travel for the right job.i have my own vehicle and own tools.
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Latest review:
Plumbing- 14 Sep 2025
Jason was really quick to get back to us and fitted our job in around his other work - thank you :)
Hunter Groundworks Ltd
Rating: 5 out of 5
Extension Builder in St Austell
Hunter Groundworks and Construction are specialists in all aspects of Groundworks, General Building and External Landscaping
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Latest review:
Groundwork & Foundations- 25 Mar 2024
Martin and his boys did a nice job on my concrete Plinth. Fast and reliable a very Professional company.
BEK CONTRACTORS LTD
No reviews yet
Extension Builder in St Austell
At BEK Contractors Ltd, we take pride in being one of Cornwall’s most trusted and reliable contractors. With a huge portfolio of successful projects behind us, we have the experience, skills, and local knowledge to handle jobs of every size — from small residential works to large-scale commercial developments. What sets us apart is our unwavering commitment to quality workmanship. Every project we deliver is completed to the highest standards, using the best materials, and carried out by a team that genuinely cares about the results. We understand that your home or business is one of your biggest investments, which is why we treat every project as if it were our own — with care, attention to detail, and pride in a job well done. Our customers choose us not only for the standard of our work, but also for the way we work. We’re known for being honest, approachable, and easy to deal with, keeping you informed every step of the way and making the process as smooth as possible. Add to that our competitive pricing, and you can feel confident you’re getting both excellent value and exceptional quality. Whether you need us for a one-off job or a larger, long-term project, you can rely on BEK Contractors Ltd to deliver.
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Bird Construction
Rating: 5 out of 5
Extension Builder in St Austell
Bird Construction is new to My Builder having taken out membership in April 2017 hence no feedback. Bird Construction offer the complete service for all types of projects no matter of its size. All works are undertaken by fully skilled & qualified tradespeople. I have over 35 years experience in the industry and all jobs are Project Managed by me from start to completion.
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Latest review:
Bricklaying- 28 Mar 2018
I am very happy with the end result. Nathan takes great pride in his work. I was impressed from his first visit when he made it clear what my options were and the timetable. He kept me informed throughout the process. I would have no hesitation in referring to him again if I need further work done or in recommending him.
Fletcher Construction Services ltd
Rating: 5 out of 5
Extension Builder in St Austell
We are General builders based in polperro near looe. Our work speaks for itself, we are passionate, dedicated and reliable builders who even cover the smallest of jobs. with over 45 years experience within the company your in safe hands. We offer fantastic quality tradesmanship. We are fully insured and comply with all health and safety regulations, plus CSCS registered. We undertake all aspects of construction.
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Latest review:
Stonemasonry- 1 Feb 2019
Not just a wall repair, a wall rebuild and terrace re lay From start to finish I could not be happier, quoted quickly, advised me of a date quickly for start of job and started on that date, completed in time despite horrendous weather, always on hand to answer questions personally that I had and I added more to job and this was not a problem, very busy business so snap him up quickly, he is coming back soon to sort my roof and other bits :)
Bastion Developments (Builders & Contractors) Ltd
Rating: 5 out of 5
Extension Builder in St Austell
We specialise in domestic and light commercial projects with 36 years in the construction industry. The managing director takes a very much 'hands on approach' to the work and who is qualified in Construction and Civil Engineering with an NVQ level 4 and has a NVQ Level 7 Diploma in Senior Construction Management. We carry out groundworks,drainage,structural repairs,new build extensions,accident damage repair,plastering and decorating,plumbing,carpentry and brick/block work. We use sub contractors for electrical and gas work and are also approved contractors by Trading Standards.
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Latest review:
Carpentry- 11 May 2026
Adam did a fabulous job replacing all the internal doors and the floors in my kitchen and hallway. It has transformed my home. He is friendly and professional and scrupulously honest, always letting us know when additional work would affect the estimate (which he absolutely stuck to otherwise). He worked round supply problems brilliantly and always kept us informed about when he would be working. He was a pleasure to have around and I will definitely be using him again.
Oliver Group Construction Limited
Rating: 5 out of 5
Extension Builder in St Austell
With almost a decade of experience, OLIVER GROUP CONSTRUCTION LTD has established itself as a reliable name in the construction industry in Cornwall. Our team of professionals is committed to making your ideas come to life. Contact us today for a free estimate.
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Latest review:
Conversions - General- 23 May 2021
Reece and Jake have been fantastic. The quality of work and professionalism is second to none. I would happily recommend them (and will be using them again on another project in the near future). Job very well done thanks.
Atlantic Construction
No reviews yet
Extension Builder in St Austell
Atlantic construction We’re a cornwall based company trading for 25 years 9 employees Fully insured site management qualifications Health and safety certifications
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HLA Building
Rating: 5 out of 5
Extension Builder in St Austell
I run a small business of 8 staff we complete work to a high standard and to budget , I have a number of happy customers with references.full refurbishment, barn conversion, new builds plus all aspects of stone work under taken
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Latest review:
Plastering- 2 Jun 2026
Top quality and turn up on time.
Gds carpentry & construction
No reviews yet
Extension Builder in St Austell
About Us - We are a small, established carpentry and construction company based in North Cornwall, specialising in high-quality finishes across all aspects of our work. With over 18 years of experience in the building industry, we have built a solid reputation for craftsmanship, reliability, and attention to detail. We take pride in delivering well-managed projects from start to finish, working closely with clients to ensure their ideas are brought to life to a high standard. Whether it’s bespoke carpentry, renovations, or larger construction projects, our focus is always on quality workmanship and clear communication. Much of our work comes through recommendations and repeat clients, and we are happy to provide references upon request.
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C J Boyce Building Contractor
No reviews yet
Extension Builder in St Austell
I am a general builder that has lots of experience in masonary and carpentry work but can carry out any job to a high level of craftsmanship that is required
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LS Carpentry & Building Services
Rating: 5 out of 5
Extension Builder in St Austell
We are a professional family run business with over 30 years experience providing bespoke multi trade services across Cornwall. So if your looking for a carpenter, builder, kitchen and bathroom fitter, electrician, plasterer..... we do it all. Anything from small home improvements to extensions and renovations We're equipped to provide a personal service from start to finish. Using our knowledge and experience we can design and create your project with very little need for other tradesman.
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Latest review:
Carpentry- 1 Nov 2018
Luke was absolutely brilliant, very helpful and a really reasonable price. The level of workmanship is amazing, a really happy customer. Thankyou.
A C Taylor
Rating: 4 out of 5
Extension Builder in St Austell
Experienced builder, 35 years in the trade. Previous work including ground works, block laying, brick drives, conversions, extensions, carpentry work and new builds. Examples of which can be easily provided on request. Customer satisfaction is essential and I aim to impress, just give me a call.
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Latest review:
Arrived on time to discuss job said he would send quotation and I never received it.
Michael Royle Builder & Plasterer
No reviews yet
Extension Builder in St Austell
Hi my name is Michael Royle and I am a general builder and plasterer, I do from extentions to relivations and new builds, I have 10 years experience in the trade and like to put my best in all my work and to my clients sasatisfaction,
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Thoughtful Construction Ltd
No reviews yet
Extension Builder in St Austell
Multi-trade experienced construction company undertaking all new constructions large and small
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What types of services are offered by local extension builders in St Austell?

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 Austell 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 Austell who are available and interested can respond to your post.

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

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

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

Find extension builders in St Austell with MyBuilder

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

Step 2: Compare different extension builders in St Austell

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

Step 3: Hire St Austell extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in St Austell, 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 Austell extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a St Austell extension builder before hiring?

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

An extension builder in St Austell 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 Austell 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 Austell?

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 Austell 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 Austell 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 Austell

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

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

Many St Austell 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 Austell help with materials and finishes?

Yes, most extension builders in St Austell 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.