Earlier editions: 2026-09
Title 5 — GENERAL WELFARE AND BUSINESS REGULATIONS›Division 524 — TIME-OF-SALE RESIDENTIAL WEATHERIZATION DISCLOSURE
Contra Costa County Municipal Code Ch. 524-4 Requirements
Contra Costa County Municipal Code · 2026-10 edition · updated 2026-10-04 · Contra Costa County
Cite as: Contra Costa County Municipal Code Chapter 524-4 · Text as of 2026-10-04
524-4.002 - Weatherization disclosure requirements.¶
Every seller of a residential dwelling building containing one through four dwelling units shall provide to all prospective buyers of the dwelling, on an approved standardized form, written information on whether all of the following energy saving devices exist on or in each dwelling unit:
(1) All accessible attic space above living area is insulated, and if so, the thermal resistance (R) value (as defined in Section 2-5302 of Title 24 of the California Administrative Code, as amended or recodified from time to time) of the insulation material;
(2) All doors and windows leading to unheated areas are weatherstripped;
(3) Hot water heater tanks are fitted with an insulation blanket or other insulation material;
(4) All accessible shower heads have flow restrictors or low flow shower heads;
(5) All accessible heating and cooling ducts in unheated areas are insulated;
(6) All major joints and openings to the dwelling's exterior, including switchplates and wall outlets, are caulked or sealed.
(Ords. 84-23 § 4, 83-36 § 2).
524-4.004 - Acknowledgment by buyer.¶
Every buyer of a residential dwelling containing one through four dwelling units shall submit written acknowledgment of receipts of the information required by Section 5244.002, to the county public works director, within fourteen days after close of escrow or transfer of title to the property.
(Ords. 84-23 § 4, 83-36 § 2).
524-4.006 - Standardized form.¶
The public works director shall establish a standardized form to be used by sellers and buyers to comply with the requirements of this division.
(Ords. 84-23 § 4, 83-36 § 2).
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