Adding Residential Unit Above Existing 4-Unit Property in DC (R-23 Zone)

[biniam berhe]

Hello everyone,

I currently own and operate a fully-occupied 4-unit multi-family property in DC (R-23 zoning). Given the current high interest rates and housing costs, I'm exploring the possibility of adding a residential unit on top of my existing building for personal use as an owner-occupant.

I'm wondering if other property owners in DC have pursued similar vertical additions, and I would greatly appreciate hearing about your experiences, particularly:

• Is this a common approach for property owners in DC?
• What was your experience with the permitting process while managing existing tenants?
• Any specific structural challenges you encountered with your existing building?
• Approximate timeline and cost range for your project
• Impact on current tenants during construction
• Recommendations for architects/contractors who have experience with similar projects
• Any unexpected issues or advice you wish you had known before starting

I'm in the early planning stages and would value learning from those who have undertaken similar projects in our area.

Thank you for your time and insights.

Best regards,