Extension Builders in Y Felinheli

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

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 Y Felinheli

84 Results

Sort by:

GB Operations (Gwynedd) Limited
Rating: 5 out of 5
Extension Builder in Y Felinheli
Gwynedd Builders is a successful building company established in North Wales. With our dedicated and skilled team every client can be assured of receiving a structured well organised and professional service with the highest standard of work.
Get in touch
Latest review:
The work is ongoing I have some holiday cottages and he has done a lot of work plumbing plastering and restoring. He started off by doing a small plastering job and the work has snowballed from there. He is a good tidy worker I am pleased with his work and I can highly recommend him.
aaron williams plastering
Rating: 5 out of 5
Extension Builder in Y Felinheli
my name is aaron, i am a NVQ qualified & time served plasterer, I completed my training in llandrillo college (rhos-on-sea). i have been plastering for over 15 years & have excellent knowledge in damp and woodworm, dry rot as i specialized in this for a number of years. many types of plastering such as rendering, (Krend) pebble dashing, moulding work, and all indoor skimming and boarding & prep work. I’m also Experienced in renovating properties to. i’m friendly ,honest ,clean and reliable
Get in touch
Latest review:
Plastering- 26 Aug 2021
Aaron completed the rendering job promptly and fixed the door so we were very pleased and will contact again in the future. I would recommend
Carlisle construction
No reviews yet
Extension Builder in Y Felinheli
Carlisle Construction is a trusted name in the industry, bringing over 30 years of experience to every project we undertake. Known for our commitment to quality, integrity, and craftsmanship, we specialize in delivering reliable construction solutions tailored to meet the unique needs of each client. Whether it’s residential, commercial, or renovation work, our skilled team ensures every job is completed on time, on budget, and to the highest standards. At Carlisle Construction, your vision is built to last.
Get in touch
Evans Building & Renovations
No reviews yet
Extension Builder in Y Felinheli
Evans Building & Renovations is a reliable and experienced building company delivering high-quality workmanship across all aspects of construction and home improvement. Our services include plastering, full renovations, extensions, patios, cladding, and general building work. We take pride in attention to detail, fair pricing, and completing every project to a high standard from start to finish.
Get in touch
Aron Lloyd Construction and Civil Engineering
Rating: 4.6 out of 5
Extension Builder in Y Felinheli
3 years trading now as A Lloyd construction Ltd, 9 years of very good experience in construction and civil engineering. Previous jobs include warehouse refurbishment, all aspects of construction, groundwork and civil engineering taken site managers course level 3 first aid at work ,all plant tickets any sizes!
Get in touch
Latest review:
Groundwork & Foundations- 26 Sep 2024
Very helpful, considerate and thoughtful. Job completed to a very high standard, always available on phone. Would recommend Aron and his team to everyone.
NW Building Services Ltd
New on MyBuilder
Extension Builder in Y Felinheli
NW Building Services Ltd is a North Wales based building services contractor delivering high-quality electrical, fire protection, heating, renewable energy, building and restoration projects for residential and commercial clients. As part of NW Services Group Ltd, we combine multiple specialist divisions under one contractor, allowing us to manage projects efficiently while maintaining high technical standards and compliance across all trades. Our team brings extensive experience across electrical installations, fire alarm systems, heating systems, renewable technologies, as well as building and property restoration works. Whether undertaking refurbishments, system upgrades, compliance works, restoration projects or new installations, we focus on delivering reliable workmanship, clear communication and professional service from start to finish. We take pride in our attention to detail, safety standards and commitment to completing projects on time and within budget. Based in North Wales, we cover Conwy, Gwynedd, Anglesey, Denbighshire and surrounding areas. Services include electrical installations, fire alarms, heating systems, renewables, building works, restoration projects, refurbishments and compliance works.
Get in touch
njt builders
Rating: 5 out of 5
Extension Builder in Y Felinheli
From design to compleation,we take care of it all. Over 35 years of experience in the building industry.
Get in touch
Latest review:
Plastering- 7 Aug 2025
Nigel and his team came and completed the job with ease they were on time very clean and the work was outstanding would recommend to anyone Thanks
Amlwch Construction
No reviews yet
Extension Builder in Y Felinheli
Residential Building and Commercial As a company, we have been offering a 10-year warranty, since March 1997 and have an unblemished record of achievement with them. If you are a client looking to have your new home built or a developer looking to build multiples of new homes, look no further than Amlwch Construction We strive to provide exceptional service and quality and offer Principal Contractor services throughout Wales New bespoke homes Flats/Apartments Multiple new homes on one site Conversion of existing buildings to dwellings Listed building conversion Refurbishments and Renovations Garden walls Extensions Fully insured, compliant with CDM Regulations (2015), over 90% directly employed skilled labour.
Get in touch
Bae construction ltd
No reviews yet
Extension Builder in Y Felinheli
Bae Construction is a company dedicated to delivering building and construction services of the highest standard. We pride ourselves on the quality of work we can deliver for a variety of different projects large or small. Based in Anglesey we aim to provide building and construction services throughout Anglesey and north West Wales. We have over 25 years experience in the building industry having worked on projects of all sizes from conversions to refurbishments and new builds. Whatever the size of your building project our commitment is to Provide the highest standard of workWork in partnership with you to deliver your projectCommunicate effectivelyKeep to your budgetExceed your expectations
Get in touch
Dafydd Lloyd
Rating: 5 out of 5
Extension Builder in Y Felinheli
Dafydd Lloyd provides a professional service, quality workmanship and value for money. Our team has the flexibility and experience to undertake projects ranging from minor repairs and maintenance to major refurbishments, specialist projects and construction works.
Get in touch
Latest review:
Dafydd and his team have fitted a new welsh slate roof on part of our farmhouse, built a rear retaining wall, fitted surface water drainage to the rear of the building and rendered one of the two gable end walls in lime mortar. The jobs have been carried out to a very good standard and the workmen have been excellent in both carrying out the work and looking after the property whilst working there. They still have one gable wall to complete but due to weather conditions and the use of lime mortar this will be down when the weather improves. Whenever I have discussed any part of the work they have been quick to react positively. Overall really satisfied with the work and will be hiring them to fit new concrete floors inside the house and Dafydd has already organised a visit from a heating engineer to give a quote on central heating. One final point, the financial cost of the work completed has come in just as the initial quote stated which was very welcoming given scare stories you hear of every increasing bills. No such problem on this job and overall very pleased with Dafydd Lloyd's work. In my experience there a good friendly professional firm to hire.
C.M.Williams joinery & building contractor
No reviews yet
Extension Builder in Y Felinheli
Hi my name is Carwyn Mon Williams,im a joiner by trade..but have learnt building work over the years as i have been in the trade for over 14 years! i have a close knit group of tradesmen i use so that i can carry out the full package. From a simple repair to a full new build etc..i pride myself on keeping my customers happy & always carrying out work to the highest standard!
Get in touch
Riley Joinery And Construction
No reviews yet
Extension Builder in Y Felinheli
We are a family based joinery and building work contractor company out of Holyhead North Wales 🏴
Get in touch
KRM CONSTRUCTION
Rating: 5 out of 5
Extension Builder in Y Felinheli
Krm Construction ltd have been in business for over 25 years and pride ourselves in offering a fast efficient service at reasonable prices with no obligation written quotations. We offer a full service for your home including kitchens , bathrooms ,structural alterations , plastering , decorating we also specialise in quality garage conversions.
Get in touch
Latest review:
Conversions - General- 11 Mar 2025
Good customer service, chimney coming down this eeek
K-cal plastics ltd
Rating: 4.9 out of 5
Extension Builder in Y Felinheli
We are a small family run business, based in north Wales. The company was formed in 2009. We are suppliers and installers of quality upvc and aluminium double glazed windows and doors, conservatories, high security composite doors, steel doors. Facia boards, soffits and gutters, cladding and small extensions.
Get in touch
Latest review:
Extensions- 9 Sep 2025
Sean was great. The job was completed in a day and a half. Polite and very hardworking. I would definitely hire again if I need more work doing. Thank you guys. Very happy with the work you put in.
LGM building & Refurbishment
Rating: 3.7 out of 5
Extension Builder in Y Felinheli
At LGM We undertake home renovations and construct extensions. With a fully qualified & insured team behind us there isn't much we can't do. We deal with building control & organise materials so you don't have to, giving you a stress free journey. We come from generations of builders before us handing down vast amounts of knowledge that we apply to our practices giving the best, most cared for results Friendly, reliable & extremy proud. FB: L.G.M Building & Refurbishment
Get in touch
Latest review:
Plastering- 28 Dec 2021
Lloyd from LGM Builders called to give me a quote to plaster my bedroom walls and ceiling. He was very helpful and friendly. He suggested putting insulation boards on the outside wall to keep the heat in. I also needed one new board on the ceiling. I was told the whole job would be 1 day prep and 2 days work. Lloyd arrived alone and completed all the work in 1 day and asked to be paid. I never expected to have any problems and paid him by bank transfer that evening. I then discovered that the new boards covered my window sill and also didn't allow enough room for the new radiator to be fitted without moving the pipes. Lloyd purchased a new window sill on my behalf and said he would return to fit later in the week. As the plaster dried I noticed lots of indentations and it was quite rough in places. When Lloyd arrived I mentioned the faults in the plaster so that it could be fixed. Lloyd's personality completely changed, his tone was aggressive, which made me feel very vulnerable and uncomfortable in my own home. He said he had done a good job and if I was a painter I would know that the indentations would need filling prior to painting. He then said he wasn't going to waste his time putting the new sill on when he could be working for someone else.
Skeffington properties
Rating: 5 out of 5
Extension Builder in Y Felinheli
Skeffington Developments are happy to provide high quality building works, no job is too big OR too small. -building works -refurbishments -upvc double glazing -facias and soffits -roofing -rendering -New builds
Get in touch
Latest review:
Conservatories- 16 Feb 2021
We have used Skeffington Properties for the last two jobs on our house. The first was resealing of the conservatory and second was sorting our porch roof out to stop a continuous drip that started last week. Both jobs completed promptly after our requests and tidied after themselves. Thanks

What types of services are offered by local extension builders in Y Felinheli?

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 Y Felinheli 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 Y Felinheli who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Y Felinheli?

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

Find extension builders in Y Felinheli with MyBuilder

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

Step 2: Compare different extension builders in Y Felinheli

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

Step 3: Hire Y Felinheli extension builders with confidence

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

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

What to ask a Y Felinheli extension builder before hiring?

Before hiring an extension builder in Y Felinheli or extension building company in Y Felinheli, 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 Y Felinheli?

An extension builder in Y Felinheli 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 Y Felinheli 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 Y Felinheli?

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 Y Felinheli 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 Y Felinheli 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 Y Felinheli

Can an extension builder in Y Felinheli help with planning permission?

Yes, many extension builders in Y Felinheli 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 Y Felinheli handle everything from design to construction?

Many Y Felinheli 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 Y Felinheli help with materials and finishes?

Yes, most extension builders in Y Felinheli 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.