How much does a single-storey extension cost?

Single-storey extensions typically cost between €35,000 and €80,000 depending on size and finish. We provide a fixed-price quote after our site visit.

Is a single-storey extension exempt from planning?

Many are, provided they meet size, height and setback limits. We check this for your property and advise accordingly.

Flat roof or pitched roof?

Both are excellent options. Flat roofs are more cost-effective and suit modern designs. Pitched roofs match traditional homes better. We advise based on your property.

How long does a single-storey extension take?

Typically 8 to 12 weeks from start to completion.

Will it match my existing house?

Yes. We carefully match materials and finishes so the extension integrates seamlessly.

Service / Single-Storey Extensions

Single-Storey Extensions

Cost-effective ground-floor extensions that maximise your footprint without the complexity of going up.

Recent single-storey extensions

Single-storey rear extension with white render, flat roof and aluminium sliders

01 / 06

White render, flat roof rear extension

Single-storey flat-roof rear extension onto a paved patio

02 / 06

Flat-roof rear extension, paved patio

Single-storey side extension with hipped tiled roof and rendered finish

03 / 06

Hipped-roof side extension

04 / 06

Rear extension with French doors

Single-storey extension with deep picture window

05 / 06

Deep picture window on single-storey rear

Single-storey extension interior with twin flush skylights and fireplace

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Twin skylights in single-storey extension

Scope of works

What's included
as standard.

Typical price range

€35,000 - €80,000

Every project is different. We issue a fixed-price quote after a site visit.

01Site survey and design
02Foundations and groundwork
03Blockwork and structural elements
04Flat or pitched roof options
05Full insulation package
06Windows and doors
07Internal fit-out to your spec
08Waste removal and site clean-up

About this service

Single-Storey Extensions.

A single-storey extension is often the most practical and cost-effective way to add space to your home. Whether you need a bigger kitchen, a new living room, a home office or a ground-floor bedroom, a single-storey build delivers the space without the complexity of going to two storeys.

Many single-storey extensions fall under exempted development, meaning no planning permission is needed. This saves time and cost. We check the regulations for your specific property and advise you clearly.

We build single-storey extensions with flat roofs, pitched roofs or a combination. The choice depends on your property style, budget and preference. Every option is fully insulated and built to current building regulations.

From start to finish, Julian manages the project. One point of contact, one standard of work, one team that takes pride in the result.