I'd get it valued first and ask the estate agent his opinion, may only add a few grand and cost you the same. Not that I know these things, I'm just guessing. Actually it might add £225k if you ask Gord to value it.
Makes the property much easier to sell if its appropriate. i.e. not some rectangular white plastic thrust into an Elizabethan thatched cottage. You'll be lucky to see your money back. The masses however demand double glazing.
What's the state of the current windows? you're no longer allowed to install single glazed windows (unless it is a period listed building in which case you can maintain whatever style it has) so if your current windows might need replacing soon-ish then the replacements would have to be double glazed - ie the purchaser would have to fork out a fair few quid or just have odd-looking windows.
RE: What's the state of the current windows? They're wooden sash windows, previous owner painted bottom half shut. Trouble is some of them are stained glass and I don't want to touch them
check this out we used them in our last house and it's quite impressive-keeps the original sash windows but seals them</p> http://www.ventrolla.co.uk/</p> this might be OK as well-not used them though</p> http://www.boxsash.com/sashwindows.php?link=ix</p>
RE: What's the state of the current windows? I think paul's probably given you a solution below, but definitely don't remove them if possible.
