Can I build a duplex?

Duplexes are allowed on any lot of record zoned R-1, as long a there is no adjacent duplex. There is no minimum lot size, but please keep in mind there are minimum off-street parking requirements. Each duplex requires a two-car garage for each unit. 

Show All Answers

1. What work does not require a building permit?
2. How do I find out what my property is zoned?
3. How do I know if my property is located in the floodplain?
4. Where are my property lines?
5. How do I apply for a permit?
6. Do I need a permit for a fence?
7. Do I need a permit for a shed?
8. Can I build a duplex?
9. Can I build an attached or detached accessory dwelling unit (ADU)?
10. Can I place a tiny home on my property?
11. Can I have a short term rental (AirBNB, VRBO, Etc)
12. What about the 2023 Washington State legislation related to duplexes, triplexes, fourplexes, and ADUs?
13. Do I need a permit for a sign?
14. Where can I locate a marijuana dispensary?
15. Where can I locate an autobody shop?
16. Where can I locate a RV/boat storage business?
17. Where can I locate a mini-storage unit business?
18. Can I run a daycare out of my home?
19. How do I apply for a City of Mount Vernon Business License?