Two-storey extensions in Culmore
Everything for a two-storey extension in Culmore, in one place: types, guide prices for Northern Ireland, the approval rules in Northern Ireland and how to get started.
Culmore at a glance
- Postcode districts
- BT48
- Area
- County Londonderry, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Derry (4 miles), Eglinton (4 miles), New Buildings (7.1 miles), Limavady (12.5 miles)
- Distance to Derry
- about 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 postcode district BT48 in and around Culmore, along with neighbouring Derry, Eglinton and New Buildings.
Extensions available in Culmore

Two-storey rear extensions
Design, approvals and build for Culmore homes. Guide from £49,500.
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Two-storey side extensions
For homes in Culmore: typical guide from £76,000.
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Two-storey wraparound extensions
Guide from £106,000 in Culmore, including VAT.
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Part single, part two-storey extensions
Guide from £63,500 in Culmore, including VAT.
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Extensions over a garage
From £27,500 in Culmore. Free visit to firm it up.
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First-floor extensions
Guide from £22,000 in Culmore, including VAT.
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Two-storey extensions for semi-detached houses
Our Northern Ireland guide starts at £49,500 for this type.
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Two-storey extensions for detached houses
Our Northern Ireland guide starts at £76,000 for this type.
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Kitchen extensions with bedrooms above
From £49,500 (before kitchen units) in Culmore. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Design, approvals and build for Culmore homes. Guide from £49,500 (plus en-suite).
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Culmore we also design annexes, home offices and bedrooms over garages.
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 Culmore
Culmore 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 Culmore
Do you cover Culmore?
Yes. We cover Culmore (BT48) and the surrounding area, including Derry and Eglinton. The first site visit is free.
What does a two-storey extension cost in Culmore?
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 Culmore do you cover?
Everywhere around it, including Derry (4 miles), Eglinton (4 miles) and New Buildings (7.1 miles), and the rest of County Londonderry.