Two-storey extensions in Holywood
Need more room in Holywood? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Holywood at a glance
- Postcode districts
- BT18
- Area
- County Down, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Dundonald (3.4 miles), Newtownabbey (3.7 miles), Jordanstown (4.3 miles), Greenisland (4.7 miles)
- Distance to Bangor (County Down)
- about 6.4 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 Holywood (BT18) and the places around it, including Dundonald (3.4 miles), Newtownabbey (3.7 miles) and Jordanstown.
Extensions available in Holywood
Two-storey rear extensions
Design, approvals and build for Holywood homes. Guide from £49,500.
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Two-storey side extensions
For homes in Holywood: typical guide from £76,000.
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Two-storey wraparound extensions
Design, approvals and build for Holywood homes. Guide from £106,000.
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Part single, part two-storey extensions
Design, approvals and build for Holywood homes. Guide from £63,500.
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Extensions over a garage
Holywood guide price from £27,500, Standard spec.
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First-floor extensions
Guide from £22,000 in Holywood, including VAT.
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Two-storey extensions for semi-detached houses
Guide from £49,500 in Holywood, including VAT.
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Two-storey extensions for detached houses
From £76,000 in Holywood. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Design, approvals and build for Holywood homes. Guide from £49,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Holywood: typical guide from £49,500 (plus en-suite).
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 Down
- 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 Holywood
Holywood 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 Holywood
Do you cover Holywood?
Yes. We cover Holywood (BT18) and the surrounding area, including Dundonald and Newtownabbey. The first site visit is free.
What does a two-storey extension cost in Holywood?
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 Holywood do you cover?
Everywhere around it, including Dundonald (3.4 miles), Newtownabbey (3.7 miles) and Jordanstown (4.3 miles), and the rest of County Down.