To be honest I don't see the point in extending. Once you've spent the money, you may as well have moved as its not always necessarily cheaper to extend. You'll never get your money back if you wanted to sell either as it'll be the same house just a bit bigger in the same location.
Sorry my friend but that is nonsense on so many levels. If your house is in a desirable area and you extend sensibly you will not only get the money back but you will add value.
It all depends on what sort of house in what sort of area you are talking about. If are talking about spending £30k on a £75k terraced house in the North then you might well be right.
However you could easily spend £250k on some houses and add loads of extra value.
In my own case I love my location, I don't want to live anywhere else except the very street I'm on. I just want a bigger house and so will (and have) extend.
No need to be sorry at all.
So, tell me, how much for a typical double extension?
It's all in they eyes of the beholder. Ask anyone trying to sell a house they've spent 50k plus on. They will NOT get their money back.
Only extend if you no longer wish to move or don't wish to ever recover that money back.
I'm not sure what you mean by 'the eye of the beholder', we are not talking about subjective opinions on aesthetics here we are talking hard cash and values.
And I don't need to ask anybody else who's trying to sell a house, I have done it in the past myself. I've bought, extended and sold for an increase that is in excess of the cost of building works and more than just house price inflation.
As I said the extensions need to be sensibly thought out and take into account the land prices in that area. I'm not sure why you find this a difficult concept, if it weren't true property developers wouldn't exist.
Here is a basic example.
You live on Snodsville St where a 3 bed house sells for £500k but a 5 bed house sells for £750k because large family homes are in demand. It's a nice area with good schools, good transport links and low crime.
You own a 3 bed house but have a bit of extra land on the side and back. You manage to add two bedrooms and bung on a nice kitchen extension at the back to open up the ground floor.
It's cost you £150k, your house is now worth £750k or close to.
As I said these things need to be done with respect to the desirability of the area