Há (from haver) means both "there is" and "there are", and it never changes for a plural: há um jardim, há três quartos. In the negative não goes first: não há elevador. In Brazil you will also hear tem with the same meaning.
Examples
- Há uma casa de banho no primeiro andar.
- There's a bathroom on the first floor.
- Há três quartos.
- There are three bedrooms.
- Não há jardim.
- There isn't a garden.
The mistake to avoid
There is no plural form: "hão três quartos" is wrong - há covers one thing and many.
Where this fits in
Home & neighbourhood, Portuguese A1: Describe your home and its rooms, say where things are, and talk about the places near where you live.