Two-storey extensions in Washington
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Washington.
Washington at a glance
- Postcode districts
- NE37 and NE38
- Area
- Tyne and Wear, England
- Price region
- North East England
- Nearest towns
- Chester-le-Street (3.7 miles), The Boldons (3.9 miles), Felling (4.3 miles), Houghton-le-Spring (4.6 miles)
- Distance to Newcastle upon Tyne
- about 6.4 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode districts NE37 and NE38 in and around Washington, along with neighbouring Chester-le-Street, The Boldons and Felling.
Extensions available in Washington
Two-storey rear extensions
Guide from £50,500 in Washington, including VAT.
Learn more
Two-storey side extensions
Washington guide price from £77,500, Standard spec.
Learn more
Two-storey wraparound extensions
Guide from £108,500 in Washington, including VAT.
Learn more
Part single, part two-storey extensions
From £65,000 in Washington. Free visit to firm it up.
Learn more
Extensions over a garage
Our North East England guide starts at £28,500 for this type.
Learn more
First-floor extensions
Washington guide price from £22,500, Standard spec.
Learn more
Two-storey extensions for semi-detached houses
Guide from £50,500 in Washington, including VAT.
Learn more
Two-storey extensions for detached houses
Guide from £77,500 in Washington, including VAT.
Learn more
Kitchen extensions with bedrooms above
For homes in Washington: typical guide from £50,500 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
Guide from £50,500 (plus en-suite) in Washington, including VAT.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Washington we measure distances to every boundary before suggesting a type.
Also available in Tyne and Wear
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Washington
Washington is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Washington
Do you cover Washington?
Yes. We cover Washington (NE37 and NE38) and the surrounding area, including Chester-le-Street and The Boldons. The first site visit is free.
What does a two-storey extension cost in Washington?
Using our North East England guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £50,500–£68,000 including VAT. An extension over a garage is about £28,500–£41,500.
Which other places near Washington do you cover?
Everywhere around it, including Chester-le-Street (3.7 miles), The Boldons (3.9 miles) and Felling (4.3 miles), and the rest of Tyne and Wear.