Do not wait! Secure your free deck estimate and design session today.
Do not wait! Secure your free deck estimate and design session today.
Do not wait! Secure your free deck estimate and design session today.
GARDEN ROOMS & LODGES BUILT FOR WEST WALES
With 15+ years of outdoor construction expertise, we design and install garden rooms built for West Wales’ coastal weather — durable, low-maintenance, and finished to enhance your outdoor living space.
Top Rated Expert Deck Installers
Top Rated Expert Deck Installers
Top Rated Expert Deck Installers
Award-Winning Designs & Craftsmanship
Award-Winning Designs & Craftsmanship
Award-Winning Designs & Craftsmanship
14+ Years Building Outdoor Spaces Across the UK
14+ Years Building Outdoor Spaces Across the UK
14+ Years Building Outdoor Spaces Across the UK
5.0
Based On 21 Reviews
5.0
Based On 21 Reviews
5.0
Based On 12 Reviews
5.0
Based On 12 Reviews
SERVICE OVERVIEW
GARDEN ROOMS & LODGES IN WEST WALES BUILT FOR REAL COAST-SIDE LIVING
Garden rooms aren’t just extra space — they change how you live at home. Here in West Wales, that space has to stay warm, sealed, weather-proof and structurally sound no matter what the coast throws at it.
It should give you more calm, not more maintenance. That’s why each build is crafted for insulation, weather seals, longevity, and a clean handcrafted finish that lasts.
Whether you're creating workspace in Pembrokeshire or a family lodge along the Carmarthenshire coast, our builds are designed to perform, built to last, and built for everyday outdoor living.
offering proven solutions
COMMON GARDEN ROOM & LODGE PROBLEMS WE
Solve in West Wales
01
Fully sealed, weather-treated garden rooms built to block West Wales rain and coastal moisture.
01
Fully sealed, weather-treated garden rooms built to block West Wales rain and coastal moisture.
01
Fully sealed, weather-treated garden rooms built to block West Wales rain and coastal moisture.
02
Thick insulated panels and draft-proof designs to stay warm through West Wales cold seasons.
02
Thick insulated panels and draft-proof designs to stay warm through West Wales cold seasons.
02
Thick insulated panels and draft-proof designs to stay warm through West Wales cold seasons.
03
Composite-and-treated frames that don’t absorb moisture, ideal for West Wales humidity and coast air.
03
Composite-and-treated frames that don’t absorb moisture, ideal for West Wales humidity and coast air.
03
Composite-and-treated frames that don’t absorb moisture, ideal for West Wales humidity and coast air.
04
Reinforced base frames engineered to sit level on uneven or sloped West Wales gardens.
04
Reinforced base frames engineered to sit level on uneven or sloped West Wales gardens.
04
Reinforced base frames engineered to sit level on uneven or sloped West Wales gardens.
05
Low-maintenance garden rooms that only need a clean, not reseals, repainting, or constant repairs.
05
Low-maintenance garden rooms that only need a clean, not reseals, repainting, or constant repairs.
05
Low-maintenance garden rooms that only need a clean, not reseals, repainting, or constant repairs.
BENEFITS YOU GET
What's Included in Every Project
When you choose Simon Thomas Deck & Design, you get a complete, hassle-free installation:
Personal design consultation and precise site measurement
Personal design consultation and precise site measurement
Premium composite decking boards and heavy-duty subframe installation
Premium composite decking boards and heavy-duty subframe installation
Optional upgrades: LED lighting, modern railings, or glass balustrades
Optional upgrades: LED lighting, modern railings, or glass balustrades
Fully insured workmanship with tidy, respectful installation
Fully insured workmanship with tidy, respectful installation
Post-installation inspection to ensure every detail is perfect
Post-installation inspection to ensure every detail is perfect
what makes us unique
Why West Wales Homeowners Choose Us
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Over 15 years building composite decks in Swansea — built to withstand coastal weather.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
Precision installations that don't just meet standards — they set them. Every deck is built like it's our own.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
From Mumbles to Morriston, we've transformed gardens across Swansea and the Gower Peninsula.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
Give me a call or fill out the form. We'll arrange a convenient time to visit your property and discuss your vision.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
We arrive on time, work efficiently, & leave your garden cleaner than we found. No shortcuts & mess.
Reviews
Trusted by Homeowners
Across Swansea & West Wales
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money.
Nick Finch
5.0
Simon built our decking and gazebo nearly ten years ago, and it still looks as good as the day it was installed. His workmanship is outstanding, and he’s always quick, professional, and reliable. I couldn’t recommend him more highly.
Gary Howells
5.0
What a gent, Simon has just completed out decking and we are over the moon with the finished project which tbh exceeded our expectations it has completely transformed our garden. Simon is friendly explained everything he did and battled trough some poor weather conditions without a gripe, overall we would highly recommend Simon who is a true professional in his trade.
David Stacey
5.0
Simon has just completed our new deck, and we are over the moon. Simon is extremely professional from the start. He explained how long it would take. He’s hard working, we literally had snow, rain and sunshine and he was working in all three. The Trex product is really nice, definitely worth the extra money compared to traditional decking. I would highly recommend Simon.
Nick Finch
faqs
frequently asked questions
Does humidity make the frames swell over time?
Not if they’re treated or composite-reinforced. Those materials don’t absorb water.
Will my garden room feel damp inside because of the weather?
No. When built well, moisture stays outside, not inside the room.
Do you need planning permission for a garden room?
Most garden rooms fall under permitted development, but it depends on your property size and position.
If I build a garden room, can it stay dry and warm here or will it feel damp inside all year?
It stays dry and warm when insulated and sealed properly. A good build keeps moisture out.
Does humidity make the frames swell over time?
Not if they’re treated or composite-reinforced. Those materials don’t absorb water.
Will my garden room feel damp inside because of the weather?
No. When built well, moisture stays outside, not inside the room.
Do you need planning permission for a garden room?
Most garden rooms fall under permitted development, but it depends on your property size and position.
If I build a garden room, can it stay dry and warm here or will it feel damp inside all year?
It stays dry and warm when insulated and sealed properly. A good build keeps moisture out.
Does humidity make the frames swell over time?
Not if they’re treated or composite-reinforced. Those materials don’t absorb water.
Will my garden room feel damp inside because of the weather?
No. When built well, moisture stays outside, not inside the room.
Do you need planning permission for a garden room?
Most garden rooms fall under permitted development, but it depends on your property size and position.
If I build a garden room, can it stay dry and warm here or will it feel damp inside all year?
It stays dry and warm when insulated and sealed properly. A good build keeps moisture out.
contact us
Ready to Upgrade Your Outdoor Space?
If your outdoor room feels cold, leaks in rain, or gets damp from humidity, the build wasn't done right.
We install insulated, sealed garden spaces built to stay warm, dry, and weather resistant through coastal seasons.
Built for West Wales living more usable days, more comfort, less upkeep, no damp vibe inside.
LOCATIONS
Proudly Serving
Swansea & West Wales
I'm proud to bring award-winning deck design and installation to homeowners throughout the region
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?
LOCATIONS
Proudly Serving
Swansea & West Wales
I'm proud to bring award-winning deck design and installation to homeowners throughout the region
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?
LOCATIONS
Proudly Serving
Swansea & West Wales
I'm proud to bring award-winning deck design and installation to homeowners throughout the region
Primary Service Areas
Swansea
Crosshands
Tenby
Carmarthen
Saundersfoot
Pembroke Dock
Ammanford
Plus all of West Wales
Not sure if I cover your area?