Two-storey extensions in New Buildings
Planning a bigger home in New Buildings? Compare extension types and guide prices below, then book a free site visit.
New Buildings at a glance
- Postcode districts
- BT48
- Area
- County Londonderry, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Derry (3.2 miles), Culmore (7.1 miles), Eglinton (7.9 miles), Strabane (10.5 miles)
- Distance to Derry
- about 3.1 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 New Buildings (BT48) and the places around it, including Derry (3.2 miles), Culmore (7.1 miles) and Eglinton.
Extensions available in New Buildings
Two-storey rear extensions
For homes in New Buildings: typical guide from £49,500.
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Two-storey side extensions
From £76,000 in New Buildings. Free visit to firm it up.
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Two-storey wraparound extensions
New Buildings guide price from £106,000, Standard spec.
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Part single, part two-storey extensions
Design, approvals and build for New Buildings homes. Guide from £63,500.
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Extensions over a garage
From £27,500 in New Buildings. Free visit to firm it up.
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First-floor extensions
From £22,000 in New Buildings. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
From £49,500 in New Buildings. Free visit to firm it up.
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Two-storey extensions for detached houses
From £76,000 in New Buildings. Free visit to firm it up.
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Kitchen extensions with bedrooms above
New Buildings guide price from £49,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
New Buildings guide price from £49,500 (plus en-suite), Standard spec.
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 New Buildings, with a rough idea of the approval route and cost for each.
Also available in County Londonderry
- 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 New Buildings
New Buildings 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 New Buildings
Do you cover New Buildings?
Yes. We cover New Buildings (BT48) and the surrounding area, including Derry and Culmore. The first site visit is free.
What does a two-storey extension cost in New Buildings?
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 New Buildings do you cover?
Everywhere around it, including Derry (3.2 miles), Culmore (7.1 miles) and Eglinton (7.9 miles), and the rest of County Londonderry.