my lease is up end of August. My lanlord has informed me they are putting house on market Aug 1st,

Yes, they can even sell the house with you still in it.  They must give you 1-2 days written notice each time a real estate agent is going to come through the house to show it to prospective buyers and lenders. There's going to be a lot of that. You may want to move out as soon as you can find a new home. They still have to give you 30 days written notice of the rent increase. The rent increase does not have to start on the first day of a month, but it must be at least 30 days after the notice is delivered to you. If you have a written lease, check it. These rules can be altered by the lease. Dana Sack