The Chancellor says the government's going to build 40,000 new affordable homes at a cost of £1.4bn.
On top of this, he promised to ban letting agents from charging fees to tenants, something that's already illegal in Scotland.
At the moment if you sign up to rent a property in England, Wales and Northern Ireland you can be billed hundreds of pounds for things like reference, credit and immigration checks.
Now, in England, landlords are going to have to pay these fees instead. There are currently no plans to change the rules in Wales and Northern Ireland.
Summer, 24 and from Brighton, says house prices are so high that she'll be renting for the rest of her life.
She thinks Philip Hammond's announcement is bittersweet.
"Initially I thought it was a really great thing, but it got me thinking," she tells Newsbeat.
"If the cost of these fees is going to be passed on to the landlord, as Philip Hammond says, then surely after a while the landlords will think, 'Hang on a minute - why are we paying for this?'
"The easiest thing for them to do will be to raise the rents. And that's a big concern for renters."