Two-storey wraparound extensions in Holywood
Adding a two-storey wraparound extension in Holywood gives you two new rooms stacked on one footprint. Here's how we'd approach it, what it typically costs and the rules that apply in Northern Ireland.
Useful details for planning a two-storey wraparound extension in Holywood.
- Postcode districts
- BT18
- County / area
- County Down, Northern Ireland
- Price region
- Northern Ireland
- Guide price
- £106,000–£145,500 (£1,890–£2,600 per m²)
- Approval route
- Planning permission is usually needed.
- Nearest towns
- Dundonald (3.4 miles), Newtownabbey (3.7 miles), Jordanstown (4.3 miles)
- Distance to Bangor (County Down)
- about 6.4 miles
- First visit
- Free, no obligation
About a two-storey wraparound extension
A two-storey wraparound extension is an L-shaped addition that extends both the side and the rear of your house, on two floors. It gives one of the largest gains in floor space of any extension, typically a big open-plan kitchen and living area below and two or more bedrooms or bathrooms above.
We cover postcode district BT18 in and around Holywood, along with neighbouring Dundonald, Newtownabbey and Jordanstown.
What it costs in Holywood
Guide prices for two-storey wraparound extensions in Northern Ireland are around £1,890–£2,600 per m² of new floor space, including VAT. For a typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space), that's roughly £106,000–£145,500. Kitchens, bathroom fittings and flooring are priced separately so you can compare like with like.
| Spec | Per m² | An L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) |
|---|---|---|
| Essential | £1,740–£2,390 per m² | £97,500–£133,500 |
| Standard | £1,890–£2,600 per m² | £106,000–£145,500 |
| Premium | £2,270–£3,120 per m² | £127,000–£174,500 |
Planning and building control in Holywood
In Northern Ireland, the permitted development allowance for two-storey extensions covers rear extensions of up to 3 m that stay 7 m from the rear boundary. A wraparound adds a side element on two floors, so it normally needs a planning application. The fee is £347 per dwelling, and councils aim for an average of 15 weeks for local applications.
Approval in Northern Ireland: Planning application for works to a house: £347. Councils aim to decide local applications within an average of 15 weeks; many take longer.
Building control: Building control approval from the local council under the Building Regulations (Northern Ireland), using the Technical Booklets.
Design points for Holywood homes
Two roofs that meet
A wraparound needs the side roof and rear roof to join cleanly, often with a valley or hip where they meet. Getting pitches and ridge heights right keeps rainwater moving and avoids a bulky mass at the back corner, which neighbours and planners notice.
Phasing the build
A wraparound touches two sides of the house at once, so the kitchen and often the rear rooms are out of use for part of the build. We plan the sequence so you keep a working kitchen and bathroom for as long as possible, or advise when moving out briefly makes sense.
How we'd run your project
Measure and listen
A visit to Holywood to understand how you live in the house now and what the extra rooms need to do, plus a first look at the structure.
Get it approved
Once you're happy with the design we submit it to the council for Holywood and deal with any questions from the planning officer.
Technical design
We prepare the building regulations drawings, structural calculations and specification so the build price can be fixed.
On site
One project lead runs the job, keeps you updated and arranges inspections at each stage until completion.
Questions about two-storey wraparound extensions in Holywood
How much does a two-storey wraparound extension cost in Holywood?
Our guide for Northern Ireland, which covers Holywood, is £1,890–£2,600 per m² including VAT. A typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) comes to about £106,000–£145,500. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
How long does a two-storey wraparound extension take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils aim to decide local applications within an average of 15 weeks; many take longer), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
Do I need planning permission for a two-storey wraparound extension in Holywood?
Holywood is in Northern Ireland. Planning permission is usually needed.
Can a wraparound extension be part single, part two-storey?
Yes. Many wraparounds keep the rear part single storey with roof lights over the kitchen and put the two-storey part to the side. This can reduce the effect on neighbours and the cost. We set out both options at the design stage, so you can compare floor space against price before choosing.
Is a wraparound extension better than separate side and rear extensions?
Building both at once usually costs less than two separate projects, because you pay for one set-up, one scaffold, one roof junction and one set of approvals. It also lets the layout be designed as a whole. The trade-off is a larger single outlay and a longer build, often 16 to 24 weeks at this size.
Nearby
The same service in neighbouring towns:
Other extensions in Holywood
- Rear
- Side
- Part two-storey
- Over a garage
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Holywood · Two-storey wraparound extensions across County Down
Want a figure first? Try our guide price tool, then book a free visit to firm it up.