A purely subjective observation, but in a city like Portsmouth with a fairly decent stock of flats of a variety of ages, new-builds represent poor value for money.
http://*******.com/hfvvf
£189k but you do get a "secret walled garden" thrown in!
You should be able to get a 2-bed flat in a pleasant location in Southsea in a converted large house for miles less, although as with everything else in the housing market there is some tat on offer.