So we are in the fortunate position of having come into some money, so our decision on the above is now brought forwards.
We live SE London and moved from a flat (where we had been for 15 years) 2 years ago, into a 4 bed house in the same locality.
Initially this was intended as a long term move, however i think because we were so wowed by actually having space we overlooked some aspects that are now annoying about our house. We have been gradually doing it up (spent about £40k on new windows, render, built in cupboards) and the plan had been to save for a few years and get a rear extension to add some of the bits that we don't have (namely utility area, downstairs loo and direct garden access). However I don't think the cost of the extension would be added to the value of the house, as we are pretty much at ceiling height for our road and wouldn't be adding on an extra bedroom (as loft already done).
So upsides to extending:
Would gain bigger kitchen dining area
Direct access to garden
Downstairs loo
Utility
Could extend and still have money in the bank
Downsides:
The extension is a bit awkward, we have a drop to the garden so it would be split level (I've done some mock ups and we could make a feature of this, but means more complicated architect and planning permission process than bog standard extension)
We would be unlikely to add the value onto our house in the near term (I don't know exact extension costs but would estimate £75-100k)
The garden length would be reduced to about 8.5m (not unheard of round here as London, but still on the small side)
We are terraced so no side access, which is more of an issue now we have a dog.
It seems like moving would be a better option to try and get what we want, however there is so little on the market at the moment in the price range that it's hard to tell whether we could get all we wanted by a move or not, and when you factor in stamp duty etc the cost of moving is huge, so would leave us with very little savings left.
One option is to sit tight for a few years and see, however our plans will affect the work we are doing on the house and how much we spend as it would be for sale, rather than for us (e.g spend loads on the tiled path I want in the front garden, vs make it look tidy with brick).
WWYD?