Garden annexes · Lisburn

Garden annexes in Lisburn

Homeowners in Lisburn can get garden annexes from one company: the design, the paperwork and the building work sit with us rather than with three separate firms.

Covering Lisburn

Our coverage around Lisburn (BT27, BT28) also includes Belfast (7 miles to the north-east) and Newtownabbey.

Homes in County Antrim

Housing in Northern Ireland mixes terraces in Belfast and Derry with detached houses and bungalows in towns and rural areas, many with room to extend.

What goes into a garden annexe?

We design annexes as permanent buildings with proper foundations, insulation and services, and we prepare the planning case showing how the annexe will be used as part of the main home. Connections for water, drainage and power are planned from the start.

  • Design and planning application
  • Heating, hot water and electrics
  • Accessible design options for older relatives

How much does a garden annexe cost in Lisburn?

Typical ranges for garden annexes. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.

Garden annexesGuide price incl. VAT
Standard specification£2,400 to £2,900 per m²
Good specification£2,900 to £3,400 per m²
High specification£3,400 to £3,900 per m²

Do you need permission for a garden annexe in Lisburn?

Projects in Northern Ireland need planning clearance from one of the eleven councils and building control approval, also from the council. The Party Wall etc. Act does not extend to Northern Ireland, so work near neighbours is agreed directly and documented carefully.

In Northern Ireland an annexe needs planning permission and building control approval.

What should Lisburn homeowners check first?

  • The annexe normally has to remain part of the main household, not let as a separate home.
  • Drainage may need a pump if the garden falls away from the sewer.

What happens after I enquire?

  1. Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
  2. We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
  3. Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
  4. Construction and completion. One site lead co-ordinates every trade through to the building control certificate.

Questions about a garden annexe in Lisburn

Do I need planning permission for a garden annexe?

Usually yes, because people will sleep in it. Outbuilding permitted development does not cover living accommodation.

Can you make it wheelchair accessible?

Yes. Level access, wider doors and a level-access shower can be designed in from the start.

Who deals with the council for a project in Lisburn?

We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.

Garden annexes in nearby towns

Learn more about garden annexes, or see every project we cover in Lisburn.

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