We have had an offer accepted on a (desperately needed) larger home in london. The seller purchased this property only a few years ago and has done a lot of work very recently (rear,side,loft extension and refurb) and is selling it at a much higher value as "high-quality" finish. I'm worried we may have over-offered in our initial excitement, as nothing has sold at that price-level before on that street. Going through the searches/level 3 building survey process at the moment. The seller has provided construction company details (with 5-year warranty only on the structural elements and roof, however the windows, doors and fittings have no guarantees). Not sure how best to check that we are not paying a premium for a house that just looks glossy and new, but will have costly problems in future? Anything we should consider/information we should ask the seller for to try minimize this risk - feeling anxious about proceeding.