Building services in Darlington
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Darlington
| Project | Guide range (inc VAT) |
|---|---|
| Double-storey extensions | £1,500–£2,250 per m² of floor area (both floors) |
| Hip-to-gable loft conversions | £49,500–£70,000 for a hip-to-gable with rear dormer |
| Garage conversions | £16,000–£27,000 for a single integral garage |
| House renovations | £800–£1,600 per m² for a medium to full renovation |
| Porches | £5,750–£14,500 from a 3 m² porch to a small front extension |
| Orangeries | £2,150–£3,050 per m² of floor area |
Building costs in the North East run about 10% below the UK average, and the figures for Darlington are adjusted to reflect that.
Planning permission in Darlington
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.
About building in Darlington
The North East has many terraced streets and post-war semis, where rear extensions and loft conversions are popular ways to gain space.
If your home is in Darlington or close by in Newton Aycliffe, Yarm and Stockton-on-Tees, a free home visit is the first step. Darlington has a population of around 92,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Darlington
Do I need planning permission for an extension in Darlington?
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.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
Do you work in Darlington?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Darlington, including postcodes DL3 and DL98.
How much does an extension cost in Darlington?
A single-storey extension in Darlington typically costs £1,750–£2,600 per m² of floor area, and a double-storey extension £1,500–£2,250 per m² of floor area (both floors), including VAT.
How much does a loft conversion cost in Darlington?
A rear dormer loft conversion in Darlington typically costs £43,000–£61,000 for a typical rear dormer with en-suite, including VAT.