Two-storey front extensions in County Londonderry

County Londonderry at a glance

Nation: Northern Ireland
Price region: Northern Ireland
Postcode areas: BT
Towns covered: 11 listed below, plus surrounding villages
Approval route: Planning permission is needed for anything built forward of the front wall.
Site visits: Free, no obligation

What a two-storey front extension involves

A two-storey front extension is an addition built forward of the front wall of your house on both floors, often a deeper hall or study below and a larger bedroom above. It suits houses set well back from the road.

County Londonderry towns we list: Derry (BT48), Coleraine (BT51), Limavady (BT49), Magherafelt (BT45), Portstewart (BT55) and Portrush (BT56). Every other address in County Londonderry is covered as well.

Guide price in Northern Ireland

Using our Northern Ireland rates, a two-storey front extension with a 3 m × 2 m footprint on two floors (12 m² of new floor space) comes to about £23,000–£31,500, including VAT. Bigger or more glazed designs cost more per m². Keep a contingency of around 10% for things nobody can see until the ground is opened up.

Spec	Per m²	Typical project
Essential	£1,780–£2,430 per m²	£21,500–£29,000
Standard	£1,940–£2,640 per m²	£23,000–£31,500
Premium	£2,320–£3,170 per m²	£28,000–£38,000

Rules in Northern Ireland

In Northern Ireland, the permitted development allowance for two-storey extensions is written for rear extensions, so a two-storey front extension needs a planning application. The fee is £347 per dwelling, and councils aim for an average of 15 weeks for local applications. Building control approval from the council under the Technical Booklets is also needed.

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.

There is no Party Wall Act in Northern Ireland. Shared walls and boundaries are a matter of title and common law, so we agree access and record conditions with neighbours before work starts.

Getting the design right

Daylight to existing rooms

A front extension can make the hall and front rooms darker, especially if it covers an existing window. We position new windows to keep the house bright, and check that the new front bedroom gets good daylight without overlooking houses opposite.

Roof and gable design

A front extension is the most visible part of the house, so the roof needs to look deliberate: a matching gable, a hipped bay or a porch roof below a first-floor bay. We match the pitch and materials and keep the ridge below the main roof.

How we work in County Londonderry

Start at your house
We come to your home in County Londonderry, measure up, check the ground floor walls and roof structure, and note anything near the boundaries.
Drawings, then consent
We draw the scheme, check it against the rules in Northern Ireland, and take it through the right consent with the council.
Engineer it
Foundations sized for two floors, steels for any openings, and building control approval, all before anyone starts on site.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.

Towns we cover in County Londonderry

Two-storey front extensions in County Londonderry: questions

How much does a two-storey front extension cost in County Londonderry?

In Northern Ireland our guide is £1,940–£2,640 per m² including VAT, so about £23,000–£31,500 for a 3 m × 2 m footprint on two floors (12 m² of new floor space). Essential and Premium specs move that by roughly 8% down or 20% up.

Can I combine a front extension with a porch?

Yes. A common approach is a two-storey bay or gable with a single-storey porch roof running across the front door. This gives a bigger hall and front bedroom while breaking up the mass of the front wall. Both parts are covered by the same planning application and building regulations approval.

Does a front extension affect my parking?

It can. If it is built over part of the drive you may lose a parking space, and some councils consider whether enough off-road parking remains. We measure the drive at the survey and show on the drawings how cars, bins and meters will fit after the work.

Will the council approve a two-storey front extension?

It depends on the street. Councils are more cautious about front extensions than rear ones because they change the street scene. Approval is more likely where the house is set back, the projection is modest, the design echoes the original house and similar additions already exist nearby. We give you a frank view at the free site visit.

Will I need planning permission in County Londonderry?

County Londonderry is in Northern Ireland. Planning permission is needed for anything built forward of the front wall.

Neighbouring areas

All extension services in County Londonderry · About two-storey front extensions