1. an apartment building without an elevator
2. an apartment located in a building without an elevator

1. describing a building or apartment that can only be reached by stairs

Examples

• She lived in a fourth-floor walkup in Brooklyn.
• The rent was cheaper because it was a walkup apartment.
• Many old walkup buildings in the city lack modern amenities.
• He was tired of climbing five flights to his walkup every day.
• The walkup building had narrow staircases and no air conditioning.
• They found a charming walkup in the historic district.
• Moving furniture into a walkup can be challenging.