Extension Builders in St Agnes, Cornwall

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Some of our top rated extension builders in St Agnes, Cornwall

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Bastion Developments (Builders & Contractors) Ltd
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
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.
Milne Construction
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Solid Reputation. Concrete Values.
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Latest review:
Extensions- 1 Dec 2016
Can only say good things about Will and his team. They were polite, considerate and friendly, timely and tidy. Will project managed the whole first floor dormer extension which he did better than we could hope for, taking all the worry out of the work. He had great attention to detail and took on board everything we said or asked for. Will was thorough in his preparation of the estimate and we were really only over because our old house threw up extras and we opted for additional work. He kept us informed of what the extras were likely to be at all times and always checked with us first. We felt he was approachable and it was easy to discuss any queries with him. We are extremely pleased with the quality of finish and the end result. I would not hesitate to recommend Milne Construction.
Precision Projects
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Here at Precision Projects, we specialise in quality home construction throughout Cornwall. From New Builds to renovations and everything in between, our team of skilled artisans are here to make your plans a reality. Customer satisfaction will always be our utmost priority. A combination of well organised project management and exceptional craftsmanship allows us to achieve a great rapport with our clients. Thank you for your business, we look forward to working with you.
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Latest review:
Carpentry- 25 Oct 2024
Perfectly
Oliver Group Construction Limited
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
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.
Jordan hubbard
Rating: 4.8 out of 5
Extension Builder in St Agnes, Cornwall
I am the proud owner of Precision Projects. A small independent business, where we take pride and care in all of our work. We specialise in: -new builds, extensions, renovations, roofing, bathrooms, kitchens, wardrobes and all first & second fix tasks. Customer satisfaction has and always will be my main priority for the business. Feel free to explore my portfolio so you can see what we have achieved! Thank you for your business, I look forward to working with you. -Jordan
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Latest review:
Hard Flooring- 26 Apr 2024
Overall the quality of the work was good, but the price was quite high. We were on a tight schedule otherwise we might have gone for a cheaper option. Communication was generally good and the team that fitted the floor were friendly and efficient.
S.M HUBBARD CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
I have 35 years experience in general house building e.g. carpentry, plastering, masonry and groundwork. We often do renovations, extensions and conservation work. Its been a family business since 1976 and we take great pride and care in our work.I have 2 teams comprising of masonry plastering trades then carpentry roofing but as experienced builders we can cover most aspects of building works as I have 3 sons in the trade aswell as other men
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Latest review:
Plastering- 12 May 2024
Shane did a brilliant job at a good price. He always turned up when agreed and kept us updated. His rendering was neat and he left the area tidy. We would be happy to use Shane again for other work.
Black Lion Building Services
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Here at Black lion building services we take a lot of pride in thinking outside of the box when it comes to making a house your home. We have a wealth of knowledge from many years in the building industry and can cover all your internal and external requirements
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Latest review:
Bricklaying- 8 Nov 2023
Tomos worked hard and did a goid job for us. Will use him again.
Mtb carpentry
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Fully qualified carpenter/joiner covering all aspects of carpentry. My aim is to complete the job to the highest standard and on time .15 years of on the tools experience
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Latest review:
Carpentry- 6 Aug 2025
Mike was quick to estimate and returned his quote in good time. He turns up when he said he would. His workmanship is very good and cleaned up any mess leaving our place very tidy. We are well pleased with the 6 new Oak doors fitted. We would have no problem in using Mikes services again.
CMC, carpentry and construction.
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Mini Machines Cornwall Ltd. We have been in the construction industry since 2012 offering a wide range of jobs from carpentry to landscaping and general building. We are res tec approved and can offer a 10 year warranty on any fibreglass roofing. Now offering mini digger hire / chipper hire and more.
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Latest review:
Roofing (Flat)- 16 Feb 2026
Friendly and professional. Did the job quickly with excellent communication and a good result at a good price. Highly recommended.
an carpentry
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Discover the craftsmanship of our small Cornish carpentry and construction company, where we prioritize customer satisfaction above all else. Our skilled team brings a diverse range of expertise, ensuring that every project is executed to the highest standard. Trust us to deliver exceptional quality and meticulous attention to detail in every aspect of our work. ✔️doors and flooring ✔️ kitchens ✔️extensions ✔️new builds ✔️roofing ✔️ renovations ✔️ ground works ✔️federation of master builders ✔️fully insured
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Latest review:
Carpentry- 30 Sep 2022
Alex fitted skirting boards in our very old cottage, not one straight wall, and floor uneven in places, a true challenge!! Job completed in one day as promised and a truly first class one at that. You'll get an honest days work from this team and a quality job done. We've got him coming back to do more work for us, my wife is highly impressed and happy. Professional,fastidious tidy, and a lovely bloke to deal with.
DCM builders
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
We carry out any type of building work, renovations, kitchens and bathrooms.
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Latest review:
Conversions - General- 17 Mar 2023
Definitely use these guys again 🙂
PR Developments
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
P. R.Builder groundwork s landscaping. Extensions newbuilds renovation work brick stone block work drainage plastering dry linning roofing patios all construction work undertaken .All work fully insured. References and photos if required.I have over 40years experience in construction and building problem solving and expertise to under take any problematic situations underpinning sureing and any drainage sewer problems free advice given. All work is warranteed .Very friendly and easy to work with and listen to what customers needs .Expert in drainage and water problems replace old drainage broken collapsed inspection chambers soakaways water treatment plants drainage fields. There isn't any problems the I can't overcome.
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Latest review:
Extensions- 21 May 2025
We recently had a one storage extension built by Phill and Angel and we are extremely happy with the result. He was professional, punctual, and easy to work with from start to finish. The quality of his work is excellent, and the new extension blends in perfectly with the rest of the house. Phill kept everything tidy and on schedule, and he made sure I was happy with every part of the job. I really appreciated his attention to detail and clear communication throughout the project. I would highly recommend Phill to anyone looking for a reliable and skilled builder. Thank you again for the fantastic job!
C Oakes and Son ltd
Rating: 4 out of 5
Extension Builder in St Agnes, Cornwall
A family ran business priding in give a great service and high work standards at a reasonable rate.
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Latest review:
Carpentry- 29 Oct 2024
They were hired to rectify the subpar work of a previous contractor. The previous builder had installed a pocket door system but failed to include any doors or construct the system properly. However, C. Oakes and Sons confidently assured us they could assist in installing the four pocket doors despite these issues. They successfully installed all four doors and sourced parts to create doorstops, as none had been incorporated into the system. We were very pleased with their work and will definitely engage their services again in the future.
Beaulen Construction
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Welcome to BREACH CONSTRUCTION where we offer full carpentry and construction services including kitchens, doors, stairs, skirtings, architraves, deckings, timber frame and much more! All jobs considered from residential to commercial. Whatever the size. With a good network of skilled tradesman, full projects completed to a very high standard. Get in touch today!
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Latest review:
Carpentry- 28 Oct 2022
Joe responded very promptly and met on site to discuss the works and agree a price in advance. He began the works on the agreed date and completed within the forecast time frame. He was happy to return later to make some minor adjustments. He is a proficient and tidy worker.
Chamfer projects ltd
Rating: 5 out of 5
Extension Builder in St Agnes, Cornwall
Hi, my name is James and I formed Chamfer Projects Ltd in 2018. I have served an apprenticeship in carpentry and joinery and this has been my profession for the past 17 years, and more recently moving into site and project management. Throughout this time I have completed various projects around the country. I have a highly skilled team of tradesman who carry out every job to a high standard.
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Latest review:
Kitchen Fitting- 3 Feb 2020
James was very professional from start to finish, his attention to detail and his work was amazing with nothing being too much trouble. Highly recommended.
J J Construction
Rating: 4.3 out of 5
Extension Builder in St Agnes, Cornwall
Sole trader construction business working on my own or with 1-3 employees, with 25 years of building experience in all forms of construction. Renovations, extensions, house remodelling and all forms of domestic building projects. In the past I have worked as foreman for Hillier landscaping. I am a qualified site supervisor (SSSTS) . Qualified site first aider. I have public liability insurance\employers insurance. Worked on extensions large and small brick/stone/render. And much more.
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Latest review:
Extensions- 22 Feb 2019
i hired JJ construction to do a kitchen extension for me last October, once we accepted his quote, he said he couldn't start until this March, so we stopped searching for other builders, it was all going to plan until now just 2 weeks before he was supposed to start the job, we received a really vague email from him just saying he wouldn't be able to do the work now, i emailed back asking why and saying how we've waited so long for the work to be done and is he really going to just let us down at such notice, to which he never even had the decency to reply. I wouldn't hire this guy because he is such a let down and if you don't want to do a job, i would suggest you don't accept it in the first place. We are really disapointed.

What types of services are offered by local extension builders in St Agnes, Cornwall?

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 Agnes, Cornwall 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 Agnes, Cornwall who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in St Agnes, Cornwall?

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

Find extension builders in St Agnes, Cornwall with MyBuilder

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

Step 2: Compare different extension builders in St Agnes, Cornwall

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

Step 3: Hire St Agnes, Cornwall extension builders with confidence

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

What to ask a St Agnes, Cornwall extension builder before hiring?

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

An extension builder in St Agnes, Cornwall 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 Agnes, Cornwall 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 Agnes, Cornwall?

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 Agnes, Cornwall 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 Agnes, Cornwall 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 Agnes, Cornwall

Can an extension builder in St Agnes, Cornwall help with planning permission?

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

Many St Agnes, Cornwall 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 Agnes, Cornwall help with materials and finishes?

Yes, most extension builders in St Agnes, Cornwall 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.