Orangery extensions in Brentwood
Our design and build teams take on orangery extensions in Brentwood, from the first measured survey through planning and building control to the finished room.
- Guide price in BrentwoodFrom £31,500 inc VAT
- PlanningSame limits as single-storey rear; glazing checked for building regs
- Build time10–16 weeks on site
- Postcode districtsCM13, CM14, CM15
Extensions in and around Brentwood
Postcode districts we cover around Brentwood include CM13, CM14, CM15. Neighbouring towns we cover include Billericay (5 miles), Basildon (7 miles), South Ockendon (8 miles), Stanford-le-Hope (9 miles).
Hornchurch, in Greater London, is roughly 6 miles from Brentwood and also on our list. The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.
Orangery extension prices in Brentwood
Labour and material costs vary across the UK, so for Brentwood we use our East of England factor (×1.06). The ranges include VAT and exclude design, structural and council fees.
Typical rates in Brentwood: £2,540 to £4,770 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 4 m 12 m² | £31,500 – £38,500 | £35,500 – £45,000 | £43,000 – £57,500 |
| 4 m × 4 m 16 m² | £40,500 – £49,500 | £47,000 – £59,500 | £57,500 – £76,500 |
| 4 m × 6 m 24 m² | £61,000 – £74,000 | £71,000 – £89,500 | £86,000 – £114,500 |
Want a range for your exact size? The guide-price tool takes about a minute.
Planning rules that apply in Brentwood
In England a glazed or orangery-style extension follows the same size limits as any single-storey rear extension: 3 m or 4 m without an application, or up to 6 m and 8 m through prior approval. Building regulations limit glazing to about a quarter of the new floor area plus the openings it replaces, unless whole-house calculations show the design still performs.
Before any drawing is finalised we check whether the house is listed, in a conservation area or subject to an Article 4 direction.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
What is included
- Thermal calculations where glazing is generous
- Heating sized for the glass area
- Foundations, walls and insulated perimeter roof
- Opening into the main house
What happens next
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 Brentwood home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions people ask about orangery extensions
Who do I contract with for an orangery extension in Brentwood?
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.
Do I need building regulations approval in Brentwood?
Yes. Almost every extension needs it, whatever the planning route. We prepare the drawings and book the inspections.
Do you cover all of Brentwood?
Yes. We cover Brentwood and the surrounding parts of Essex. Site visits are free and there is no obligation.
What is the difference between an orangery and a conservatory?
An orangery has a solid roof perimeter with a central lantern and more solid wall, so it is warmer and more like a room. A conservatory is mostly glass. Building regulations treat a heated orangery joined to the house as an extension.
How much does an orangery cost?
Our guide range is about £2,540 to £4,770 per m² including VAT, so a 16 m² standard-spec orangery is typically £47,000 to £59,500 in Brentwood.
Book a free site visit in Brentwood
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.