Build additional living space on your property in WD3

A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in WD3?

Granny annexe cost in WD3 - Sort by rates or availability

1 review

Torrington

From £87,192

(last active 01/10/26)

NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...

"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO

Samuele Paolini

From £87,392

(last active 01/10/26)

Need an Extension Builder in WD3? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...

ABC Associates STRUCTURES 4 U

From £87,280

Member since August 2026

Relax... you have found a reliable extension builder in WD3. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in WD3 who cons...

VA Structures

From £87,192

(last active 01/10/26)

Need an Extension Builder in WD3? VA Structures has been helping local clients (10 mile radius) with their extension buildering jobs for many years...

DC Build & Pave

From £87,280

(last active 01/10/26)

Trusted and professional extension builder in WD3. Experienced in all extension buildering work and keeping within budget and on quote. DC Build & ...

T M Builder

From £87,312

(last active 01/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Ali & Sons Builders

From £87,152

(last active 01/10/26)

I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...

The Diamond Property Service Ltd

From £87,304

(last active 01/10/26)

Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...

LALI BUILDERS

From £87,424

(last active 30/09/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Nisup Building Services

From £86,920

(last active 30/09/26)

NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...

Granny Annexe Cost in WD3

Estimates for granny annexe near WD3

Building a granny annexe ranges from £86,920 (Nisup Building Services based in HA8) to £87,424 (LALI BUILDERS based in NW10), 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 WD3 by posting a job with HaMuch. We will send it to extension builders in WD3 who will be happy to help you.


Get extension builder rates instantly

Estimates for common extension builder jobs in WD3;

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.

More extensions & conversions cost guides...