Cost to build a granny annexe in NN1

Granny Annexe Cost in NN1

Building a granny annexe ranges from £86,544 (A G Hicks Building Services based in NN3) to £87,248 (Samrai Associates Limited based in NN3), 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 NN1 by posting a job with HaMuch. We will send it to extension builders in NN1 who will be happy to help you.

"Granny annexe" - NN5, job posted 08/04/26

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Location in UK	Hourly Rate	Daily Rate
Granny Annexe near Northampton	£35	£239
Granny Annexe near Wellingborough	£39	£251
Granny Annexe near Daventry	£31	£230
Granny Annexe near Rushden	£34	£231
Granny Annexe near Kettering	£34	£237
Granny Annexe near Milton Keynes	£39	£263
Granny Annexe near Market Harborough	£31	£217
Granny Annexe near Rugby	£31	£224
Granny Annexe near Bletchley	£39	£265
Granny Annexe near Bedford	£45	£278

Estimates for common extension builder jobs in NN1;

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.