Two-storey extensions in Ballyclare
We design, get approval for and build two-storey extensions in Ballyclare and the surrounding area. Choose the type of extension below or book a free site visit.
Ballyclare at a glance
- Postcode districts
- BT39
- Area
- County Antrim, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Greenisland (6.1 miles), Jordanstown (6.1 miles), Newtownabbey (7.3 miles), Carrickfergus (8.1 miles)
- Distance to Belfast
- about 11.1 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.
We cover postcode district BT39 in and around Ballyclare, along with neighbouring Greenisland, Jordanstown and Newtownabbey.
Extensions available in Ballyclare

Two-storey rear extensions
Our Northern Ireland guide starts at £49,500 for this type.
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Two-storey side extensions
For homes in Ballyclare: typical guide from £76,000.
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Two-storey wraparound extensions
Guide from £106,000 in Ballyclare, including VAT.
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Part single, part two-storey extensions
Guide from £63,500 in Ballyclare, including VAT.
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Extensions over a garage
Guide from £27,500 in Ballyclare, including VAT.
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First-floor extensions
Ballyclare guide price from £22,000, Standard spec.
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Two-storey extensions for semi-detached houses
For homes in Ballyclare: typical guide from £49,500.
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Two-storey extensions for detached houses
Design, approvals and build for Ballyclare homes. Guide from £76,000.
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Kitchen extensions with bedrooms above
From £49,500 (before kitchen units) in Ballyclare. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Guide from £49,500 (plus en-suite) in Ballyclare, including VAT.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Ballyclare, with a rough idea of the approval route and cost for each.
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 Ballyclare
Ballyclare 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 Ballyclare
Do you cover Ballyclare?
Yes. We cover Ballyclare (BT39) and the surrounding area, including Greenisland and Jordanstown. The first site visit is free.
What does a two-storey extension cost in Ballyclare?
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 Ballyclare do you cover?
Everywhere around it, including Greenisland (6.1 miles), Jordanstown (6.1 miles) and Newtownabbey (7.3 miles), and the rest of County Antrim.