This week readers visited Brick Underground to learn how New York City co-op buildings can boost prices for sellers. For example, loosening restrictions around in-unit washer/dryers, pieds-à-terre, and pet policies can increase interest and prices in the building.

Also of interest: Three email templates you can use to negotiate when your landlord wants to raise your rent.

Here are this week's top five posts:

1) 5 ways your NYC co-op building can boost prices for sellers

2) Landlord wants to raise your rent? Here are 3 sample emails you can use to negotiate

3) 8 real-life co-op board reference letters that work

4) From Chelsea to Murray Hill: I left ‘druggy corner’ for a quiet spot of my own

5) What will I pay in property taxes after my building's abatement expires?