I am looking at a site with FPP and no restrictions for a 2200sq. ft. house. I want to build a more modest house. Would it be possible to buy the site and then change the plans for the house or will this throw up any major issues eg local needs?
there's a contradiction hereyou will need to submit a new application, I think it would be unlikely that it would cause any major issues once there are no restrictions on the site. I changed house plans on a site previously, no problems.
Just make sure house design is acceptable to planners.
If you want to be certain sure before you purchase site, arrange a meeting with the planning office or get a local councillor to enquire for you.
you could also make it condition of purchase that it is subject to change of house plans.