Firstly, well done for
choosing your own solicitor. As you now know it was a good decision.
Using a solicitor recommended by the house builder is never a good idea as you can never guarantee they will be truly "independent".
Let's face it they get £1000 off you and £20,000 off the house builder which client is going to be looked after?
The
NHBC Buildmark warranty documentation is giving after exchange or on completion.
Is your new block of flats in Cornwall?
This area is at risk from radon gas and I believe it is a Building Control/NHBC requirement that a radon gas barrier be installed in the floor.
Contaminated land is another question.
This can vary from a small oil spill from an old heating tank to harmful chemicals like arsenic, mercury, cyanide etc.
All new development will have an environmental survey at the outset and removal of contaminated areas will be a condition of planning approval.
I am not sure of the legal position of Crest's solicitor withholding the information your solicitor has requested.
Indeed, this action by itself, would indicate that something is not right and Crest are trying to hide it.
My advice would be to insist on all information being provided in 48 hours. If they fail to do so you should walk away.
Instruct your solicitor to make a claim against Crest/Crest's solicitor for all monies will lose. This will not include the
Stamp Duty concession for first time buyers I am afraid. I would also suggest that you report Crest's solicitor to the Law Society.
You are better off potentially losing £1000, than end up with a flat that you cannot sell. I would be surprised if you were able to get a mortgage with an unresolved contamination issue and/or outstanding planning conditions.