Cookstown, County Tyrone
Semi-detached rear extension in Cookstown
Single or two-storey extensions for semi-detached houses, with side access and one party wall. If you live in Cookstown and want to know what a semi-detached rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Cookstown is covered from our County Tyrone round, including BT80. In Cookstown we measure the attached neighbour's extension at the survey, because it often sets the sensible depth for yours.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a semi-detached rear extension cost in Cookstown?
In Cookstown, our guide for a semi-detached rear extension is £1,650–£2,700 per square metre including VAT for a standard specification. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £20,000–£32,500 |
| 4 m wide × 5 m deep (20 m²) | £33,000–£54,000 |
| 4 m wide × 6 m deep (24 m²) | £39,500–£64,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a semi-detached rear extension in Cookstown?
Here is how the rules in Northern Ireland apply to a semi-detached rear extension in Cookstown.
In Northern Ireland the Planning (General Permitted Development) Order (Northern Ireland) 2015 allows a single-storey rear extension of up to 3 metres on an attached house or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary. Building control approval from the council is still required.
In Northern Ireland a rear extension of more than one storey can be permitted development if it projects no more than 3 metres and stays at least 7 metres from the rear boundary. Two-storey extensions in conservation areas, and most larger schemes, need planning permission from the council.
Northern Ireland has no larger-extension prior approval route; anything beyond permitted development needs a planning application.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Cookstown like to extend?
Semis and detached houses are typical of Cookstown, and many have room for a rear extension within Northern Ireland's permitted development limits.
How a semi-detached rear extension in Cookstown comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning or permitted development, building control approval, structural design and neighbour agreements are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Semi-detached rear extensions near Cookstown
Neighbouring places we cover include Coalisland (7.2 miles) and Magherafelt (9.4 miles).
- Semi-detached rear extension in Coalisland
- Semi-detached rear extension in Magherafelt
- Semi-detached rear extension in Dungannon
- Semi-detached rear extension in Portadown
- Semi-detached rear extension in Craigavon
Other work in Cookstown:
FAQ
Semi-detached rear extension questions in Cookstown
Do I need a party wall agreement?
Northern Ireland has no Party Wall Act; we agree any shared-wall work with your neighbour in writing.
Do I need planning permission for a rear extension in Cookstown?
Often not for a single-storey rear extension of up to 3 metres (4 metres detached) under Northern Ireland's permitted development rules, outside conservation areas.
What if my neighbour has already extended?
That can make a matching depth easier to justify. We measure theirs at the survey.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
What postcode areas do you cover around Cookstown?
Including BT80, and the surrounding County Tyrone area.