What is an orangery?
An orangery is an extension with brick or block piers, large areas of glazing and a solid perimeter roof around a central roof lantern. It sits between a conservatory and a traditional extension: brighter than an extension, warmer and more private than a conservatory.
How much does an orangery cost in Seaham?
In Seaham, an orangery typically costs £2,150–£3,050 per m² of floor area, including VAT at 20% (standard rate). For a typical 16 m² project that is roughly £34,500–£49,000. Prices across the North East are typically 10% below the UK average for this kind of work, which is reflected in the range for Seaham. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (11 m²) | £23,500–£33,500 |
| Typical project (16 m²) | £34,500–£49,000 |
| Larger project (22 m²) | £47,500–£67,000 |
| Rate per m² | £2,150–£3,050 |
The main things that change the cost:
- Heating and flooring
- Opening into the house
- Lantern size
- Amount and type of glazing
Use the guide price tool to see how size and specification change the figure, then ask for a written, itemised quote.
Do you need planning permission for an orangery in Seaham?
Approvals for an orangery in Seaham follow the rules for England. In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
We check this for your address before design work starts, so there are no surprises later.
What we handle
From survey to sign-off, the job normally involves:
- Flooring and decoration options
- Building control sign-off where required
- Roof lantern and glazed panels
- Electrics, heating and plastering
- Design to suit the style of the house
- French, sliding or bifold doors
How long does it take?
The build itself usually takes 8 to 12 weeks on site. Design and approvals come first and typically take 6 to 12 weeks, depending on the approval route.
Building in Seaham
The North East has many terraced streets and post-war semis, where rear extensions and loft conversions are popular ways to gain space.
Our Seaham coverage includes postcode districts SR7, and we also work in nearby places such as Houghton-Le-Spring, Sunderland and Peterlee.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals in place
We handle planning, building control and neighbour notices before work starts.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions about orangeries in Seaham
Who approves an orangery in Seaham?
Planning matters in Seaham go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.
Can it be used all year?
Yes. With an insulated roof, efficient glazing and heating, an orangery is comfortable all year.
How long does it take?
Typically 8 to 12 weeks on site once approvals are in place.
How much does an orangery cost in Seaham?
In Seaham, an orangery typically costs £2,150–£3,050 per m² of floor area, including VAT at 20% (standard rate). A typical 16 m² project comes to roughly £34,500–£49,000. Your fixed price depends on the survey and drawings.
Can an orangery replace a conservatory?
Yes. We can remove an old conservatory and build an orangery on new or upgraded foundations.