Cost to build a granny annexe in Welling

Granny Annexe Cost in Welling

Estimates for granny annexe near Welling

Building a granny annexe ranges from £86,872 (AMJAC CONSTRUCTION LTD based in SE9) to £87,616 (HOUSE BUILDING SERVICES LIMITED based in DA16), 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 Welling by posting a job with HaMuch. We will send it to extension builders in Welling who will be happy to help you.

"Granny annexe" - BEXLEYHEATH, job posted 10/07/25

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Estimates for common extension builder jobs in Welling;

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.