Why TradesHero
Hire house extension tradess without the cowboys
A full build team
Match with builders who coordinate every trade your extension needs, from foundations to finish.
Vetted & insured
Public liability insurance and tax clearance checked before they quote.
Compare before you commit
See ratings and past builds, get real quotes, no obligation.
What's Involved
How the job gets done
01
Design & permission
Work with your builder, architect or engineer on drawings and any planning or exemption.
02
Groundworks & build
Foundations, blockwork, roof, windows and the weather-tight shell.
03
Fit-out
First and second fix electrics and plumbing, plastering, joinery and decoration.
Cost Guide
What does it cost?
Single-storey extension€1,800–€2,800 / m²
Two-storey extension€1,600–€2,400 / m²
Attic conversion€25,000–€60,000
Indicative build costs excluding design fees, VAT and finishes. A site visit gives an accurate figure.
FAQ
House Extension Trades questions, answered
Do I need planning permission for an extension?+
Extensions up to 40m² to the rear may be exempt, subject to conditions. Larger, front or side extensions usually need permission. Your builder or architect can advise.
How long does an extension take?+
A typical single-storey extension takes 2–4 months depending on size, weather and finishes.
Do I need an engineer or architect?+
For most extensions you'll need drawings and structural input. Many builders on TradesHero work with trusted designers and engineers.
How do I get an accurate extension quote?+
Post your project with rough dimensions and any drawings. Verified builders can quote and most will visit to assess the site.
Browse by County
Builders across Ireland
Builders in AntrimBuilders in ArmaghBuilders in CarlowBuilders in CavanBuilders in ClareBuilders in CorkBuilders in DerryBuilders in DonegalBuilders in DownBuilders in DublinBuilders in FermanaghBuilders in GalwayBuilders in KerryBuilders in KildareBuilders in KilkennyBuilders in LaoisBuilders in LeitrimBuilders in LimerickBuilders in LongfordBuilders in LouthBuilders in MayoBuilders in MeathBuilders in MonaghanBuilders in OffalyBuilders in RoscommonBuilders in SligoBuilders in TipperaryBuilders in TyroneBuilders in WaterfordBuilders in WestmeathBuilders in WexfordBuilders in Wicklow
Related Services