CallCall 07825 205657
Building work by Gwynedd Construction near Caernarfon

Home/Areas/Caernarfon

Builders in Caernarfon

We're not covering Caernarfon from an hour away. Our base is in Pontrug, on the road between Caernarfon and Llanrug, so most Caernarfon jobs are a few minutes from our door.

5.0


on Google · 100% recommend us on Facebook

  • 15+years in construction
  • Oneteam, groundwork to plastering
  • Freewritten estimates
  • Localbased in Pontrug, Caernarfon
Extension being built near Caernarfon Freshly plastered room New porcelain patio
15+years in construction
Local to Caernarfon

A few minutes down the road.

Being so close makes it easy to pop round for an estimate, and easy to be on site early every morning.

We build extensions, renovate houses, take out walls, convert garages, plaster and lay patios for homes all over the town and the villages around it.

Gwynedd Construction Ltd has been building in North Wales as a limited company since 2016.

Book a free estimate
Our services in Caernarfon

Building work in Caernarfon

Caernarfon is a few minutes from our base in Pontrug, so we know the town's mix of houses well: stone terraces around the walled town, Victorian villas, post-war semis and the newer estates on the edges. Here is what each kind of job looks like in Caernarfon.

House extensions in Caernarfon

House extensions in Caernarfon

Many extensions in Caernarfon are single-storey kitchen-diners on the back of semis and terraces, where the original kitchen is small and the garden is the only way to get more room.

Outside the historic centre, a single-storey rear extension can often be built under Welsh permitted development rules – up to 4 metres past the back wall and up to 4 metres high. Inside the Caernarfon Conservation Area, two-storey extensions always need a planning application.

  • Single-storey, side and two-storey extensions
  • Conservation area rules checked at the first visit
  • Planning decided by Gwynedd Council
More about house extensions
New builds in Caernarfon

New builds in Caernarfon

Plots around Caernarfon – on the edge of the town and in villages such as Llanrug, Bontnewydd and Waunfawr – come up for single new homes and self-builds.

Every new home in Wales needs a sprinkler system, and most need drainage (SAB) approval from Gwynedd Council before work starts. Some plots south of the town drain towards the Afon Gwyrfai, a protected river where phosphate rules can affect new homes.

  • New homes and self-builds
  • Sprinklers and SAB approval planned in
  • Afon Gwyrfai phosphate rules checked
More about new builds
Garage conversions in Caernarfon

Garage conversions in Caernarfon

The estates around Caernarfon have plenty of attached and integral garages that hold everything but a car. Turning one into a bedroom, office or playroom is often the quickest way to add a room.

On some newer estates, a planning condition keeps the garage as a garage. If your house has one, you need planning permission first – we check this before you spend anything.

  • Garages on newer estates checked for planning conditions
  • Insulated floors, walls and ceilings
  • Building Regulations approval
More about garage conversions
Kitchens and knock-throughs in Caernarfon

Kitchens & knock-throughs in Caernarfon

Caernarfon's older terraces were built as small separate rooms. Taking out the wall between the kitchen and the back room is a common way to make one bright kitchen-diner.

Most of those walls are load-bearing, so a steel beam goes in, sized by an engineer and checked by Gwynedd Council's building control. In a terrace, a steel that sits in a shared wall needs a party wall notice to your neighbour.

  • Walls removed with steel beams
  • Party wall notices for terraced houses
  • New kitchens fitted in the same job
More about kitchens and knock-throughs
Renovations in Caernarfon

Renovations in Caernarfon

From terraces inside the old town walls to 1960s semis, we renovate single rooms and whole houses across Caernarfon.

If your house is listed or inside the conservation area, some changes – windows, doors, render, even some inside work on a listed building – need consent first. We help you check before work starts.

  • Whole-house and single-room renovations
  • Listed buildings and conservation area checked
  • Kept tidy while you live in the house
More about renovations
Plastering in Caernarfon

Plastering in Caernarfon

Older houses in Caernarfon often have blown lime plaster, cracked ceilings and Artex that needs covering.

Artex put on before the late 1990s can contain asbestos, so an old textured ceiling should be tested before anyone sands or scrapes it. Once it's clear, it can be skimmed smooth.

  • Skimming and re-plastering
  • Artex covered after testing
  • Single ceilings to whole houses
More about plastering
Patios and landscaping in Caernarfon

Patios & landscaping in Caernarfon

Gardens around Caernarfon range from small, walled terrace yards to sloping plots looking out to Anglesey and the Menai Strait.

On a slope, a retaining wall turns the garden into flat space you can use. We lay porcelain, slate and sandstone patios, and if new hard surfaces and buildings add up to 100 square metres or more, the drainage needs SAB approval.

  • Porcelain, slate and sandstone patios
  • Retaining walls for sloping gardens
  • Drainage designed to drain away from the house
More about patios and landscaping
Local planning

Building in Caernarfon: what to know

Caernarfon has more planning protection than most towns, so it pays to check before you plan.

  • Caernarfon Conservation Area: the historic centre has been a conservation area since 1968. Inside it, many changes to the outside of a house need permission, and two-storey extensions can't be built under permitted development.
  • World Heritage Site: Caernarfon Castle and the town walls are part of the "Castles and Town Walls of King Edward in Gwynedd" World Heritage Site. Work near them is looked at closely.
  • Listed buildings: many older buildings in the town are listed. Most changes to a listed building need listed building consent.

Planning in Caernarfon is decided by Gwynedd Council, under the Anglesey and Gwynedd Joint Local Development Plan.

Outside the centre

Most estates and newer streets follow the normal Welsh permitted development rules. See our guide to extension rules in Wales.

Holiday lets

Since 1 September 2024, Gwynedd Council needs planning permission before a main home becomes a second home or short-term holiday let.

Reviews

Don't take
our word for it

Real words from real customers in Gwynedd, Bangor and Anglesey.

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.”
S
Sarah ParryGoogle review
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.”
S
S JonesGoogle review
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.”
M
MarkBangor
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.”
M
Miss EGoogle review
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.”
G
Gina SmithGoogle review
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.”
M
MilesGwynedd
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.”
S
Sherin RobertsGoogle review
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.”
S
Steven JonesGoogle review
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.”
V
VickyGwynedd
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.”
I
I MorganGoogle review
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.”
C
Carol GriffithsGoogle review
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!”
N
NerysFacebook recommendation
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.”
H
Helen EllisGoogle review
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.

Newly rendered extension with patio doors
5.0on Google
  1. 01

    Local to Gwynedd

    Based in Pontrug, just outside Caernarfon, with more than 15 years in construction.

  2. 02

    An established company

    Gwynedd Construction has been a limited company since 2016.

  3. 03

    5.0 stars on Google

    And 100% of people who reviewed us on Facebook recommend us.

  4. 04

    One team, start to finish

    From the groundwork to the plastering, so you're not passed between firms.

  5. 05

    On time and tidy

    The site is kept clean as we go, and you're kept up to date the whole way.

Mountains and lakes in Gwynedd
Based in PontrugJust outside Caernarfon, Gwynedd
Areas covered

Other places we work

As well as Caernarfon, we work across Gwynedd and Anglesey. Not on the list? Give us a ring and ask.

Questions

Questions people ask us

Is my house in the conservation area?

You can check the conservation area map on Gwynedd Council's website, or ask us when we visit and we'll check it for you.

Do you give free quotes in Caernarfon?

Yes. We're just down the road. Call 07825 205657 or send the form below.

What building work do you do in Caernarfon?

Extensions, new builds, garage conversions, knock-throughs and kitchens, renovations, plastering and patios. See our services above.

Do you only work in the town centre?

No. As well as Caernarfon itself, we work in the villages around it, such as Llanrug, Bontnewydd, Waunfawr and Llanwnda.

Do I need planning for an extension in Caernarfon?

Often not for a single-storey rear extension outside the conservation area. Inside it, or for a two-storey extension, you usually do. We check your address first.

Free estimate

Building work planned in Caernarfon?

Tell us a bit about the job. We'll come out, have a look and give you a free written estimate.

Request a free estimate

It takes about a minute.

We reply as soon as we can. Your details are only used to answer your enquiry.

Call 07825 205657 Estimate