SB9: Duplex

[nkaliape]

Under Senate Bill 9 (SB 9) passed in 2021, you may construct up to two units on a property zoned for single-family residential, and under the City's Ordinance 30706 passed in December 2021 and as allowed by SB 9, the zoning district must be R-1 or PD and the two units must be a duplex. More specifically: • You may create a duplex by remodeling the existing house or adding on to it; • You may demolish an existing house and build a new duplex; or • You may build a new duplex on a vacant lot that is zoned single-family residential (R-1 or PD zones). • Existing structures on a lot are not a constraint if those structures could be converted or demolished to make room for the new units.

My property is of 13500sqft lot with 1800+ SFH as of today.
I'm planning to add second unit (not ADU) and call it a duplex. (two dwelling units in one lot) - similar to R2 zoning.

Is that acceptable? does it need to share the wall to be duplex?

all duplex requirements with respect to Floor Area Ratio, Easements, parking, everything is MET. But just curious - does it need to share wall?

Two Family Dwelling Unit????

What would constitute a "2 family dwelling unit" or a "duplex". What would be considered a single "structure" or "building"??? The reason is one of our zonings (Rural Farm Forest (RFF)) allows a "duplex" to be built. An applicant is proposing to build 2 houses, separate, with a connecting...

www.thebuildingcodeforum.com

Please advise.

 

[classicT]

Welcome to the forum. I hope someone here will feel comfortable answering your inquiry... that said, most of us deal with building codes, and your questions relate to zoning regulations.

 

[e hilton]

I think yes, it must share a wall and possibly the roof. You may create a duplex by remodeling the existing house or adding on to it; That doesn’t say build a new separate structure.

 

[Paul Sweet]

How is "duplex" defined in SB9 and the ordinance, or the zoning code if the ordinance doesn't define it?

 

[fatboy]

I say it would need to be attached. Check with your local building/zoning department.

Welcome!

 

[nkaliape]

Say if the duplex needs to be wall shared? what is the minimum length to be shared?

 

[e hilton]

Say if the duplex needs to be wall shared? what is the minimum length to be shared?

Ask the permit office.

 

[manifold]

As others have said, check the definitions in the zoning code and discuss with zoning office. Typically, a Duplex has a common wall or floor. Two free standing houses on the same lot would be a Tandem House.