Watts

Agree, that is what I am planning to do. The existing foundation is around 50 years old.

If the building is brand new you will not be able to mortgage it without a proper warranty or PCC.

Thanks for the replies. I most likely will get rand new foundation. But I still want to what are the pros and cons of keeping the old foundation from the non-structural point of view. Anyone knows about them?

Hi all, I am planning to knock down an old bungalow and rebuild it. The footprint stays large the same with some extension to the rear. I was planning to get rid of the old foundation and lay a new one. However, the structural engineer thinks that the existing foundation is ok and there is no need to replace it. He says that one of the benefits of building on the existing foundation is that it would not be considered a new home and I would not need to pay for a 10-year new build warranty. I haven't decided yet if I am keeping the existing foundation or not. But if we dismiss the structural part, what are the pros and cons of building on existing foundations? Is it true that I will not need the 10-year new-build warranty? Are there any other consequences?

Understood, will budget for the new foundation. Thanks!

Apologies, just realized that I posted in the wrong section. Is it possible to move this thread to "Foundations"?

Hi all, I am planning to knock down an ugly pre-cast concrete bungalow in a conservation area and build a part 1-storey part 2-storey house. The planning officer emailed me with the good news that my latest revision satisfied both him and the conservation officer and the application will be recommended for approval. The expected decision date is 09/02/2024. The footprint will largely stay the same with some extension to the rear. Is it common to retain the old foundation or does it have to be demolished as well? Do you know how strict was the building control back in 1970th when the current bungalow was constructed? Did they get away with light foundations those days or did building control require a proper foundation even for precast concrete bungalows as they are considered to be lightweight? Many thanks!