Orangery extensions in Castlereagh
If you live in Castlereagh and want more space without moving, an orangery extension is one of the most practical ways to get it. We handle the drawings, approvals and the build.
- Guide price in CastlereaghFrom £25,500 inc VAT
- PlanningNI permitted development (rear 3–4 m) or planning
- Build time10–16 weeks on site
- Postcode districtsBT1, BT2, BT4, BT5, BT6
Planning rules that apply in Castlereagh
In Northern Ireland the Planning (General Permitted Development) Order 2015 lets some single-storey rear extensions go ahead without planning permission, up to 3 m on a semi-detached or terraced house and 4 m on a detached house, within height and boundary limits. Larger, side and two-storey extensions normally need planning permission from the council, and building control approval is separate.
The planning position for a specific Castlereagh address depends on its history and any designations, which is why we check it at the first visit.
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.
Included in a typical project
- Heating sized for the glass area
- Opening into the main house
- Design of piers, roof perimeter and lantern proportions
- Aluminium or timber lantern and full-height glazing
- Thermal calculations where glazing is generous
- Foundations, walls and insulated perimeter roof
Working in Castlereagh
We cover Castlereagh and the postcode districts BT1, BT2, BT4, BT5, BT6, BT7. Neighbouring towns we cover include Belfast (2 miles), Newtownabbey (6 miles), Lisburn (7 miles), Carrickfergus (10 miles).
Newtownards, in County Down, is roughly 8 miles from Castlereagh and also on our list. In Northern Ireland, extension projects follow the NI planning rules and council building control, which we account for from the first survey.
Guide prices for Castlereagh
These guide figures apply our Northern Ireland adjustment (×0.86) to national rates. They include VAT at 20% and cover the build itself; design and council fees are listed separately.
Typical rates in Castlereagh: £2,060 to £3,870 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 4 m 12 m² | £25,500 – £31,500 | £28,500 – £36,500 | £35,000 – £46,500 |
| 4 m × 4 m 16 m² | £33,000 – £40,000 | £38,500 – £48,500 | £46,500 – £62,000 |
| 4 m × 6 m 24 m² | £49,500 – £60,000 | £57,500 – £72,500 | £70,000 – £93,000 |
Want a range for your exact size? The guide-price tool takes about a minute.
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
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Orangery extension questions answered
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Castlereagh, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
How long does an orangery extension take to build in Castlereagh?
On site, typically 10 to 16 weeks once approvals are in place. Before that, allow 6–12 weeks design and approvals.
Who do I contract with for an orangery extension in Castlereagh?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
Will an orangery be too hot in summer?
Not if it is designed with solar-control glass, a solid perimeter and ventilation. We size the lantern and opening vents with that in mind.
How much does an orangery cost?
Our guide range is about £2,060 to £3,870 per m² including VAT, so a 16 m² standard-spec orangery is typically £38,500 to £48,500 in Castlereagh.
Book a free site visit in Castlereagh
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.