Cost of second year accomodation (not halls)

[BeMintViper]

My eldest DS (20) is currently in his first year and we are paying £9000 for his accomodation in halls.
DS has told us that next year when he moves to a student house his accomodation will, apparently be much less expensive. That would be very welcome, as we have four other DC still at home; however I am unsure whether what he has said is entirely accurate and there doesnt seem to be much info online re potential costs.
Has anybody noticed a reduction in cost when your DC have moved out of halls, or is DS mistaken/having me on?

We are young parents (late thirties/early forties) and so none of our friend's DC have gone off to uni yet and cant therefore offer advice.

Thanks

But beneficial for final year students, who will graduate just before the end of the lease.

I remember the half rent summer periods in the 1980s - but the rentals were grotty, some were probably deathtraps, and it was all unregulated.