Do I need planning permission for an extension in Wales?

Not always. Many single-storey extensions fall within permitted development rights, though Wales has its own rules that differ from England. We assess this during the design stage and handle the application if permission is needed.

Do extensions need building regulations approval?

Yes. All extensions must comply with building regulations regardless of planning status. Compliance is built into every stage of our process.

Will an extension add value to my home?

A well-designed extension adds lasting value as well as space. Open-plan kitchen and living extensions in particular remain the most sought-after improvement for family homes in South Wales.

Double-Storey Extensions in Bridgend & South Wales

Q: How long does a house extension take?

It depends on size and complexity. We'll give you a realistic timeline with your free quotation and keep you informed at every stage.

Q: Which areas do you cover?

We're based in Bridgend and build extensions across South Wales, including Cardiff, Swansea, Porthcawl, the Vale of Glamorgan and surrounding areas.

At Pearce Elite Construction, we design and build high-quality double-storey extensions across Bridgend, Cardiff and South Wales that blend seamlessly with your existing property while delivering the extra room and functionality your home needs.

Whether you’re looking to expand your kitchen and living area downstairs, add additional bedrooms upstairs, or completely transform the flow of your property, we manage every stage with precision, care and expert craftsmanship.

Why Choose a Two Storey Extension?

Twice the space, shared foundations

A double-storey extension uses the same foundations and roof as a single-storey build, spread across two floors. That makes it significantly better value per square metre than extending on one level.

More bedrooms without moving

Add the bedrooms and bathroom your family needs while staying in the home and area you love, avoiding agent fees, stamp duty and the upheaval of moving.

A better layout on both floors

. Downstairs gains the open-plan kitchen and living space, upstairs gains the master bedroom or ensuite. The whole house works better.

Only need ground-floor space? See our single-storey house extensions. Want extra bedrooms without extending the footprint? A loft conversion may be the answer.

A modern living area

Open the converted space into your existing layout for a larger kitchen, snug or family room.

How Much Does a Double-Storey Extension Cost in South Wales?

Because the foundations and roof are shared across two floors, the second storey adds far less cost than the first, making a double-storey extension one of the smartest investments you can make in a family home. Every project starts with a free, no-obligation quotation. No surprises, no hidden costs.

What's Involved in a Garage Conversion?

1

We shape a design that suits your home, your neighbours’ outlook and your budget, then advise on the planning position for your property. Double-storey extensions need planning permission more often than single-storey builds, and we handle the application for you where required.

2

. Every build is compliance-focused, meeting the latest building regulations and safety standards in Wales, from structural work to fire safety and insulation.

3

Foundations, structure, roof, windows, electrics and plumbing, all managed by one team with vetted tradespeople and quality materials, and honest communication throughout.

4

Plastering, decoration and final details completed to our standard, because our name is on every project we complete.

Why Homeowners in South Wales Choose Pearce Elite

Family-run since 2008

Decades of combined construction management experience, based in Bridgend.

Free quotations

No-obligation quotes at no cost.

Compliance-focused

Every build meets current Welsh building regulations.

Quality workmanship

Vetted tradespeople and quality materials for durable, lasting results.

Double-Storey Extension FAQs

Do I need planning permission for a double-storey extension in Wales?

Often, yes. While some rear double-storey extensions fall within permitted development, the rules are stricter than for single-storey builds, and Wales has its own regulations that differ from England. We confirm the position for your property during the design stage and manage any application for you.

Do double-storey extensions need building regulations approval?

Yes, always. The build must meet standards for structure, fire safety, insulation and drainage. Compliance is built into every stage of our process.

Is a double-storey extension worth it compared to a single-storey?

For most families, yes. The foundations and roof are shared across two floors, so the cost per square metre is significantly lower, and adding bedrooms typically delivers the biggest uplift in property value.

What about my neighbours and party walls?

If you live in a semi-detached or terraced home, work near the boundary may fall under the Party Wall Act. We advise on this early so notices are handled properly and relationships with your neighbours stay intact.

Can we live in the house during the build?

In most cases, yes. We plan the build to keep your home functional for as long as possible and keep disruption to a minimum, with honest communication about the stages where things get noisy or dusty.

How long does a double-storey extension take?

Due to the bespoke nature of double-storey extensions every project is unique. However, We will give you a realistic timeline with your free quotation and keep you informed at every stage.

Which areas do you cover?

We’re based in Bridgend and build double-storey extensions across South Wales, including Cardiff, Swansea, Porthcawl, the Vale of Glamorgan and surrounding areas.