Two-storey extensions in Greenisland
Need more room in Greenisland? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Greenisland at a glance
- Postcode districts
- BT37
- Area
- County Antrim, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Jordanstown (1.6 miles), Carrickfergus (2.9 miles), Newtownabbey (3.1 miles), Holywood (4.7 miles)
- Distance to Belfast
- about 7.5 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Most others need planning permission.
Greenisland sits about 7.5 miles from Belfast. Closer to home, Jordanstown is 1.6 miles away and Carrickfergus 2.9 miles.
Extensions available in Greenisland
Two-storey rear extensions
Design, approvals and build for Greenisland homes. Guide from £49,500.
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Two-storey side extensions
Design, approvals and build for Greenisland homes. Guide from £76,000.
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Two-storey wraparound extensions
Guide from £106,000 in Greenisland, including VAT.
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Part single, part two-storey extensions
For homes in Greenisland: typical guide from £63,500.
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Extensions over a garage
Greenisland guide price from £27,500, Standard spec.
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First-floor extensions
Greenisland guide price from £22,000, Standard spec.
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Two-storey extensions for semi-detached houses
For homes in Greenisland: typical guide from £49,500.
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Two-storey extensions for detached houses
From £76,000 in Greenisland. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Our Northern Ireland guide starts at £49,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
Our Northern Ireland guide starts at £49,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
Also available in County Antrim
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Design and build two-storey extensions
Rules for Greenisland
Greenisland is in Northern Ireland. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Most others need planning permission. Planning application for works to a house: £347. Councils aim to decide local applications within an average of 15 weeks; many take longer.
The full Northern Ireland rules explained
Questions about extensions in Greenisland
Do you cover Greenisland?
Yes. We cover Greenisland (BT37) and the surrounding area, including Jordanstown and Carrickfergus. The first site visit is free.
What does a two-storey extension cost in Greenisland?
Using our Northern Ireland guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £49,500–£66,500 including VAT. An extension over a garage is about £27,500–£40,500.
Which other places near Greenisland do you cover?
Everywhere around it, including Jordanstown (1.6 miles), Carrickfergus (2.9 miles) and Newtownabbey (3.1 miles), and the rest of County Antrim.