Title 8 — ZONING›Division 84 — LAND USE DISTRICTS
Chapter 84-14 — R-20 SINGLE-FAMILY RESIDENTIAL DISTRICT
Contra Costa County Municipal Code · 2026-09 edition · updated 2026-10-02 · Contra Costa County
Sections in this part
84-14.202 - General provisions.¶
All land within an R-20 single-family residential district may be used for any of the following uses, under the following regulations set forth in this chapter.
(Ord. 1768: Ord. 1569: prior code § 8146 (part): Ord. 1269: Ord. 1179).
Article 84-14.4. Uses
84-14.402 - Uses—Permitted.¶
The following uses are allowed in the R-20 district:
(1)
A detached single-family dwelling on each lot and the accessory structures and uses normally auxiliary to it.
(2)
Crop and tree farming, and horticulture.
(3)
A temporary stand for the sale of agricultural products grown on the premises, with two and one-half acres per stand, set back at least thirty-five feet from the front property line, and operated not more than three months in any calendar year.
(4)
Urban farm animal raising and keeping in compliance with the provisions of Chapter 82-50.
(5)
Publicly owned parks and playgrounds.
(6)
A residential care facility for the elderly, operated by a person with all required state and local agency approvals or licenses, where not more than six persons reside or receive care, not including the licensee or members of the licensee's family or persons employed as facility staff.
(7)
A small family child care home or a large family child care home, as those terms are defined in California Code of Regulations, title 22, section 102352(f)(1), that has obtained all required state and local agency approvals and licenses.
(8)
Bird enclosures in compliance with the provisions of Chapter 82-50.
(9)
Accessory dwelling units and junior accessory dwelling units in compliance with the provisions of Chapter 82-24.
(10)
An urban housing development in compliance with the provisions of Chapter 88- 36.
(11)
Supportive housing, operated by a person with all required state and local agency approvals and license, where not more than six persons reside.
(12)
Transitional housing, operated by a person with all required state and local agency approvals and license, where not more than six persons reside.
(Ords. 86-43 § 4, 78-83 § 2, 77-51 § 8, 68-25 § 2, 2033, 2032, 1768 § 2: prior code § 8146(a): Ord. 1269, 1179 § 8, 382 § 4V).
(Ord. No. 2022-37, § IV, 12-6-22; Ord. No. 2022-14, § IV, 3-29-22; Ord. No. 2020-01, § VII, 1-21-20; Ord. of 2018-06, § V, 5-1-18; Ord. No. 2017-11, § IV, 5-23-17)
84-14.404 - Uses—Requiring land use permit.¶
In the R-20 district the following uses are permitted on the issuance of a land use permit:
(1)
Same as in the R-6 district (Section 84-4.404) except for the deletion of "Greenhouses, over three hundred square feet";
(2)
Horse riding academies and horse riding instruction, provided that the standards in Section 82-50.408 are complied with.
(Ord. of 2018-06, § VI, 5-1-18; Ords. 86-43 § 5, 1768, 1569: prior code § 8146(b): Ord. 1269: Ord. 1179).
Article 84-14.6. Lots
84-14.602 - Lot—Area.¶
No single-family dwelling or other structure permitted in the R-20 district shall be erected or placed on a lot less than twenty thousand square feet in area.
(Ord. 1768: Ord. 1569: prior code § 8146(c): Ord. 1269: Ord. 1179).
84-14.604 - Lot—Width.¶
No single-family dwelling or other structure permitted in the R-20 district shall be erected or placed on a lot less than one hundred twenty feet in average width.
(Ord. 1768: Ord. 1569: prior code § 8146(d): Ord. 1269: Ord. 1179).
84-14.606 - Lot—Depth.¶
No single-family dwelling or other structure permitted in the R-20 district shall be erected or placed on a lot less than one hundred twenty feet deep.
(Ord. 1768: Ord. 1569: prior code § 8146(e): Ord. 1269: Ord. 1179).
Article 84-14.8. Building Height
84-14.802 - Building height—Maximum.¶
Building height provisions for the R-20 district shall be the same as those for the R-6 district (Section 84- 4.802).
(Ord. 1768: Ord. 1569: prior code § 8146(f): Ord. 1269: Ord. 1179).
Article 84-14.10. Yards
84-14.1002 - Yard—Side.
There shall be an aggregate side yard width of at least thirty-five feet. No side yard shall be less than fifteen feet wide. These minima may be reduced to three feet for an accessory building or structure if it is set back at least sixty-five feet from the front property line.
(Ord. 1768: Ord. 1569: prior code § 8146(g): Ord. 1269: Ord. 1179).
84-14.1004 - Yard—Setback.
There shall be a setback (front yard) of at least twenty-five feet for any structure in the R-20 district; on corner lots the principal frontage of the lot shall have a setback of at least twenty-five feet and the other setback shall be at least twenty feet.
(Ord. 1768: Ord. 1569: prior code § 8146(h): Ord. 1269: Ord. 1179).
84-14.1006 - Yard—Rear.
Rear yard provisions for the R-20 district shall be the same as those for the R-6 district (Section 84-4.1006).
(Ord. 1768: Ord. 1569: prior code § 8146(i): Ord. 1269: Ord. 1179).
Article 84-14.12. Off-Street Parking
84-14.1202 - Off-street parking—Space requirements.
Off-street parking provisions for the R-20 district shall be the same as those for the R-6 district (Section 84- 4.1202).
(Ord. 71-59 §§ 4, 5, 1971: Ord. 1768: Ord. 1569: prior code § 8146(j): Ord. 1269: Ord. 1179).
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