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Select your affordable Washington extension builder
From £86,040
Oscar Carballo
Member since July 2020
I have over 40 years experience in the field of construction. Thank you and I hope I will be of service to you.
Albert Radici
Trusted General Builders in Durham From small fixes to full renovations, Radici Construction delivers quality workmanship, clear communication,...
L T Builders is a trusted extension builder serving customers in Washington and the surrounding area. Contact us to today to get a competitive quot...
Need to find an Extension Builder near you for all your extension buildering work?
TK Builders provides a local, trusted extension builderi...
MM Building Services is an established and experienced local extension builder in Washington. Please contact us for a free, no obligation quote and...
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Washington. Please contact us for a free, no obligation quote...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Building Craft Ltd is an established extension buildering business in Washington. We come highly recommended and provide competitive quotes for you...
Ian
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
D H P Builders is an established extension buildering business in Washington. We come highly recommended and provide competitive quotes for your wo...

Building a granny annexe ranges from £86,040 (OCC Construction based in NE10) to £87,912 (Radici Construction North East Ltd based in DH1), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Washington by posting a job with HaMuch. We will send it to extension builders in Washington who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Washington | £33 | £254 |
| Granny Annexe near Sunderland | £33 | £251 |
| Granny Annexe near Chester-le-Street | £35 | £242 |
| Granny Annexe near Gateshead | £33 | £236 |
| Granny Annexe near Jarrow | £34 | £262 |
| Granny Annexe near Hebburn | £34 | £246 |
| Granny Annexe near South Tyneside | £34 | £261 |
| Granny Annexe near Newcastle Upon Tyne | £33 | £236 |
| Granny Annexe near Wallsend | £34 | £245 |
| Granny Annexe near Stanley | £34 | £242 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,474

Two storey extension - £87,962

Build a timber frame extension - £25,974

Build a swimming pool - £80,974

Single storey extension - £54,488

Side return extension - £41,212

Install an RSJ - £2,174

Outbuilding - £9,974

Build a Mansard loft conversion - £51,974

Loft conversion - £33,510

Build a kitchen extension - £41,974

Hip to gable loft conversion - £41,974

Granny annexe - £86,974

Garden office - £9,974

Convert a Garage - £15,974

Garage - £18,474

Build a flat roof extension - £21,974

Build a dormer loft conversion - £41,974

Concrete foundations - £6,224

Convert a bungalow loft - £28,974

Convert a basement - £37,212