Two-storey extensions in Carrickfergus
We design, get approval for and build two-storey extensions in Carrickfergus and the surrounding area. Choose the type of extension below or book a free site visit.
Carrickfergus at a glance
- Postcode districts
- BT38
- Area
- County Antrim, Northern Ireland
- Price region
- Northern Ireland
- Nearest towns
- Greenisland (2.9 miles), Jordanstown (4.4 miles), Holywood (5.4 miles), Newtownabbey (5.6 miles)
- Distance to Belfast
- about 9.5 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.
Around Carrickfergus we also work in Greenisland, Jordanstown and Holywood, and across the rest of County Antrim. Postcode district in and near Carrickfergus: BT38.
Extensions available in Carrickfergus
Two-storey rear extensions
Carrickfergus guide price from £49,500, Standard spec.
Learn more
Two-storey side extensions
Guide from £76,000 in Carrickfergus, including VAT.
Learn more
Two-storey wraparound extensions
Guide from £106,000 in Carrickfergus, including VAT.
Learn more
Part single, part two-storey extensions
From £63,500 in Carrickfergus. Free visit to firm it up.
Learn more
Extensions over a garage
Carrickfergus guide price from £27,500, Standard spec.
Learn more
First-floor extensions
For homes in Carrickfergus: typical guide from £22,000.
Learn more
Two-storey extensions for semi-detached houses
Carrickfergus guide price from £49,500, Standard spec.
Learn more
Two-storey extensions for detached houses
Our Northern Ireland guide starts at £76,000 for this type.
Learn more
Kitchen extensions with bedrooms above
For homes in Carrickfergus: typical guide from £49,500 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
For homes in Carrickfergus: typical guide from £49,500 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Carrickfergus depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
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 Carrickfergus
Carrickfergus 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 Carrickfergus
Do you cover Carrickfergus?
Yes. We cover Carrickfergus (BT38) and the surrounding area, including Greenisland and Jordanstown. The first site visit is free.
What does a two-storey extension cost in Carrickfergus?
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 Carrickfergus do you cover?
Everywhere around it, including Greenisland (2.9 miles), Jordanstown (4.4 miles) and Holywood (5.4 miles), and the rest of County Antrim.