This week, readers visited Brick Underground to learn how a couple upgraded from a Gramercy studio to an Upper West Side two bedroom thanks to a Covid discount. It's a good fit for them now—but they expect the rent to increase by 20 to 30 percent when their lease ends in 2023.

Also of interest: Fannie Mae issues new guidance in response to the Surfside condo collapse, which means some New Yorkers will lose access to loans starting January 1st.

Here are this week's top five posts:

1) Holiday Tipping Guide: How much to tip your doorman, super, porter, and other staff

2) From Gramercy to the Upper West Side: Upgrading from a studio to a two bedroom thanks to a pandemic discount

3) Changes by Fannie Mae to prevent another Surfside tragedy mean some NYC buyers will lose access to loans

4) For NYC condos and co-ops with private outdoor space, buyers are willing to pay even more now

5) Advice for buyers looking for NYC condos and co-ops with low carrying costs