Extension plans and drawings in County Antrim
We prepare extension plans and drawings for homes across County Antrim, on their own or as the first stage of a full design and build project.
- Guide priceFrom £1,000 inc VAT
- PlanningWe find the right route for you
- Towns covered8
- Site visitFree, no obligation
Towns in County Antrim
What we take care of
- Two or three layout options to compare
- Structural calculations from an engineer (full pack)
- Planning drawings: existing and proposed plans and elevations, site and location plans
- Building regulations drawings and specification
- 3D views to check the look and the light (full pack)
- Measured survey of the house and garden
Will the council need to approve it?
In Northern Ireland we check the permitted development limits for your house type and, where needed, apply to your council for planning permission, then submit full plans or a building notice to council building control.
In a conservation area or area of townscape character the permitted development rights are more limited, listed homes need listed building consent, and if rights have been removed by a condition, any extension needs an application.
In Northern Ireland building control is run by the councils under the Building Regulations (Northern Ireland). We submit full plans or a building notice and book the inspections through to completion.
Applications are decided by your council, which handles local planning in Northern Ireland.
Working in County Antrim
Towns we cover in County Antrim include Belfast, Lisburn, Newtownabbey, Castlereagh, Carrickfergus, Ballymena, Antrim, Larne. In Northern Ireland, extension projects follow the NI planning rules and council building control, which we account for from the first survey.
What it costs in County Antrim
Guide fees for County Antrim including VAT, using our Northern Ireland factor of ×0.86. Council and building control charges are not included.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Measured survey and planning drawings | £1,000 – £1,900 |
| Standard | Planning drawings plus building regulations drawings | £1,850 – £3,300 |
| Premium | Full pack with structural calculations and 3D visuals | £2,900 – £4,750 |
Try the guide-price tool to see a range for your own size and finish.
From first visit to completion
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
We visit your County Antrim home, measure up, talk through what you want and check the planning position.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Common questions in County Antrim
How long does this take for a County Antrim home?
2–6 weeks for drawings, depending on the council and the complexity of the project.
Do you cover all of County Antrim?
Yes, across the whole of County Antrim. Site visits are free and there is no obligation.
Will my neighbours in County Antrim be involved?
If a planning application is needed, the council notifies neighbours. Where work is close to a shared boundary, we agree access and protection with them in writing.
Can I use your drawings with another builder?
Yes. Once paid for, the drawings are yours to use for your project.
Do I need an architect?
Not necessarily. For most extensions an experienced designer or architectural technologist is enough. For listed buildings or complex sites an architect’s input can help.
Book a free site visit in County Antrim
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.