A new home is the biggest building job most people ever take on. We build from the ground up, and one local team stays answerable from the first trench to the handover.
We build new homes and extensions across Gwynedd and Anglesey from our base in Pontrug, just outside Caernarfon, and we manage the trades from start to finish.
Building a new home in Wales has its own rules – sprinklers, drainage approval and stricter energy standards than in England. We plan for them from the first visit, so they don't turn into surprises halfway through. Gwynedd Construction Ltd has been building in North Wales as a limited company since 2016.
Every good build starts with the ground: clearing the site, digging and pouring the foundations, and laying the drains.
In Wales, the surface water drainage for most new homes needs its own approval before work starts, so we build the drainage exactly to the approved design.
Every new home is different, but every build follows the same order.
Visit and estimate
We look at the plot and your drawings, and price the work in writing.
Approvals in place
Planning, Building Regulations and drainage (SAB) approval before work starts.
Groundwork
Site cleared, foundations dug and poured, drains laid.
Walls and structure
Walls built with the insulation in, floors and openings formed.
Roof on
The building is made watertight so the inside work can start.
Inside and handover
Plastering and finishing, final inspections and a clean house handed over.
Building in Wales
The rules for a new home in Wales
Building a new home in Gwynedd is different from building one in England. These are the rules to plan for:
Sprinklers: since 1 January 2016, every new house and flat in Wales needs an automatic fire suppression system. This includes buildings converted into new homes.
Drainage approval: in Wales, building work with a construction area of 100 square metres or more needs approval from the council's SuDS Approval Body (SAB) before work starts. That covers almost every new home.
Energy: since 23 November 2022, new homes in Wales must produce 37% less carbon than the 2014 standard.
Phosphates: some river catchments in Gwynedd, including the Afon Gwyrfai and the Glaslyn, are protected. New homes that drain into them may need to show they won't add phosphorus to the river.
Since 1 September 2024, Gwynedd Council needs planning permission before a main home becomes a second home or short-term holiday let. Eryri National Park brought in the same rule on 1 June 2025.
Who decides?
Planning is decided by Gwynedd Council, or by the Eryri National Park Authority if the plot is inside the Park. Building control in Gwynedd is run by the council, from Caernarfon and Dolgellau.
Reviews
Don't take our word for it
Real words from real customers in Gwynedd, Bangor and Anglesey.
“Once the decision to FINALLY get a new kitchen was made the nerves set in. There was no need, Gavin and his team made everything right. Communication was excellent … And best of all done within timescale agreed. Very Happy.”
★★★★★
Office repairs · Google
“I’ve used Gwynedd Construction on several occasions for general repairs in my office, and every time the service has been exceptional. Gavin, the owner, is professional, reliable, and clearly takes pride in the work his team delivers. … Highly recommended if you’re looking for quality workmanship in North Wales.”
★★★★★
Garage conversion
“Can't speak highly enough of Gwynedd Construction Ltd. They completed the work on time and to an extremely high standard. Nothing was too much trouble … Will definitely use them again.”
★★★★★
Building project · Google
“I must commend the excellent high-quality construction work that was delivered. … The planning phase was executed to perfection … the team's ability to effectively manage unexpected changes truly stood out. … 100% recommend.”
★★★★★
Bedroom work · Google
“Gwynedd Construction did an excellent job on the work i had done on my bedroom. They were very professional and polite. They cleaned up afterwards and you wouldn't have known they had done work on my bedroom.”
★★★★★
Walls removed, 3 RSJs fitted
“Gavin and Geraint were extremely professional from our very first meeting. They are two hard working, trustworthy, reliable and extremely tidy workmen. … Can't recommend them highly enough.”
★★★★★
Renovation project · Google
“Can't speak highly enough of Gwynedd Construction and the incredible work they did on our one-year renovation project. … What impressed us most was their ability to handle unexpected challenges with ease, offering creative solutions while staying on schedule and within budget.”
★★★★★
Extension, garage & patio · Google
“The team built a large extension at the back of my property and a detached garage … I then had the team back to do a patio and a retaining wall. Also very clean and tidy workers … Good job Gavin and gang.”
★★★★★
New kitchen & wall removal
“We are extremely pleased with the work that has been completed. … Everything was kept safely and out of the way at the end of the day. They all worked very efficiently to a very high standard.”
★★★★★
Builder · Google
“A true craftsman, a master of his trade. A man of integrity and reliability always prompt and courteous. … I’d highly recommend this exceptional builder and his skilled team.”
★★★★★
Extension · Google
“Gwynedd Construction provides excellent, quality professional service, project managed my extension, very impressive, on time and within budget, as well as offering innovative design advice along the way, highly recommended.”
★★★★★
New patio · Facebook
“Hogia clên ac taclus iawn ei gwaith. Glanhau bob nos cyn gadael ac yn hollol ddi-drafferth. Awgrymu’r cwmni’n gryf!”“Friendly lads, very tidy work. They cleaned up every night before they left, and it was completely hassle-free. Highly recommend the company!”
★★★★★
Building work · Google
“It was a pleasure to welcome this friendly professional and trustworthy crew every morning. Never let me down, in fact went out of their way to find solutions to unforeseen issues.”
★★★★★
New kitchen · Google
“Once the decision to FINALLY get a new kitchen was made the nerves set in. There was no need, Gavin and his team made everything right. Communication was excellent … And best of all done within timescale agreed. Very Happy.”
★★★★★
Office repairs · Google
“I’ve used Gwynedd Construction on several occasions for general repairs in my office, and every time the service has been exceptional. Gavin, the owner, is professional, reliable, and clearly takes pride in the work his team delivers. … Highly recommended if you’re looking for quality workmanship in North Wales.”
★★★★★
Garage conversion
“Can't speak highly enough of Gwynedd Construction Ltd. They completed the work on time and to an extremely high standard. Nothing was too much trouble … Will definitely use them again.”
★★★★★
Building project · Google
“I must commend the excellent high-quality construction work that was delivered. … The planning phase was executed to perfection … the team's ability to effectively manage unexpected changes truly stood out. … 100% recommend.”
★★★★★
Bedroom work · Google
“Gwynedd Construction did an excellent job on the work i had done on my bedroom. They were very professional and polite. They cleaned up afterwards and you wouldn't have known they had done work on my bedroom.”
★★★★★
Walls removed, 3 RSJs fitted
“Gavin and Geraint were extremely professional from our very first meeting. They are two hard working, trustworthy, reliable and extremely tidy workmen. … Can't recommend them highly enough.”
★★★★★
Renovation project · Google
“Can't speak highly enough of Gwynedd Construction and the incredible work they did on our one-year renovation project. … What impressed us most was their ability to handle unexpected challenges with ease, offering creative solutions while staying on schedule and within budget.”
★★★★★
Extension, garage & patio · Google
“The team built a large extension at the back of my property and a detached garage … I then had the team back to do a patio and a retaining wall. Also very clean and tidy workers … Good job Gavin and gang.”
★★★★★
New kitchen & wall removal
“We are extremely pleased with the work that has been completed. … Everything was kept safely and out of the way at the end of the day. They all worked very efficiently to a very high standard.”
★★★★★
Builder · Google
“A true craftsman, a master of his trade. A man of integrity and reliability always prompt and courteous. … I’d highly recommend this exceptional builder and his skilled team.”
★★★★★
Extension · Google
“Gwynedd Construction provides excellent, quality professional service, project managed my extension, very impressive, on time and within budget, as well as offering innovative design advice along the way, highly recommended.”
★★★★★
New patio · Facebook
“Hogia clên ac taclus iawn ei gwaith. Glanhau bob nos cyn gadael ac yn hollol ddi-drafferth. Awgrymu’r cwmni’n gryf!”“Friendly lads, very tidy work. They cleaned up every night before they left, and it was completely hassle-free. Highly recommend the company!”
★★★★★
Building work · Google
“It was a pleasure to welcome this friendly professional and trustworthy crew every morning. Never let me down, in fact went out of their way to find solutions to unforeseen issues.”
Why us
Why people pick Gwynedd Construction
A local builder you can reach on the phone, who turns up when they say and leaves the job tidy.
5.0★★★★★on Google
01
Local to Gwynedd
Based in Pontrug, just outside Caernarfon, with more than 15 years in construction.
02
An established company
Gwynedd Construction has been a limited company since 2016.
03
5.0 stars on Google
And 100% of people who reviewed us on Facebook recommend us.
04
One team, start to finish
From the groundwork to the plastering, so you're not passed between firms.
05
On time and tidy
The site is kept clean as we go, and you're kept up to date the whole way.
Based in PontrugJust outside Caernarfon, Gwynedd
Areas covered
Where we build
We build across Gwynedd and Anglesey. Not on the list? Give us a ring and ask.
Yes. Since 1 January 2016, all new houses and flats in Wales, including those made by converting another building, need an automatic fire suppression system.
Do I need drainage (SAB) approval?
Almost certainly. In Wales, building work with a construction area of 100 square metres or more needs SAB approval for its surface water drainage before work starts.
Can you build from my architect's drawings?
Yes. We build to the approved drawings and work with your architect or designer as the job goes on.
Do you give free quotes?
Yes. Call 07825 205657 or send the form below, and we'll arrange a free estimate.
Other work we do
More from the same team
The same local crew can take on the rest of the house and garden too.
