Bay Area/ San Francisco

Castro Thai Massage Business Headed For Former Does Your Mother Know Space

Published on June 24, 2025
Castro Thai Massage Business Headed For Former Does Your Mother Know SpacePhoto: Steven Bracco/Hoodline

A new Thai massage business will soon open at 4141 18th Street (between Castro and Collingwood streets), formerly the novelty and adult product shop Does Your Mother Know.

After submitting a change of use in April, Thyme Thai Spa was approved to open at the retail location.

Does Your Mother Know moved to its new location at 450 Castro Street in January.


Thyme Thai Spa will open at 4141 18th St. | Photo: Steven Bracco/Hoodline

 

Thyme Thai Spa's change of use was quickly approved over the counter. According to the SF Planning Code, massage establishments are permitted within the Castro Street Neighborhood Commercial District.

In 2022, former District 9 Supervisor Hillary Ronen passed legislation that amended the planning code to 'principally permit' ground-floor massage establishments.

Earlier this month, Thyme Thai Spa also received approval from the Department of Public Health for its permit.

On a recent visit by a Hoodline reporter, construction work was already underway. Partitioned off rooms inside the former retail space could be observed.


Construction work is underway at 4141 18th St. | Photo: Steven Bracco/Hoodline

 

Public records indicate an application for a construction permit was submitted on April 17 and issued on May 19. The storefront is approximately 1,800 square feet.

Remodel work includes building therapy rooms and a reception desk, installing new plumbing for an ADA-compliant bathroom, replacing the furnace and ducts, upgrading fixtures and finishes, and making electrical improvements throughout the space. Construction costs are estimated at $200,000.

The retail space previously underwent a mandatory soft-story retrofit in 2019.

Thyme Thai Spa joins a handful of massage establishments in the neighborhood, including Ohm Thai Massage, Wela Thai Massage, M Spa, Suchada Re-Energize, and Castro Star Massage.