A 535-square-foot cottage in Walnut Creek's Northgate neighborhood is listed at $3,250 a month, but tenants who work from home would pay $3,450.

The rental listing for the furnished, one-bedroom accessory dwelling unit at 900 Trails End Drive includes a single unexplained line that has drawn attention across Bay Area media: "If working from home additional $200 monthly."

The listing, reported by Walnut Creek Patch and ABC7's Cameron Bopp on Thursday, July 23, includes utilities, electricity, water, Wi-Fi, trash service, landscaping, a private entrance, patio, and parking. It describes the property as offering "quiet country beauty, horses, privacy, and convenience" with easy access to downtown Walnut Creek, BART, and Mount Diablo State Park.

No explanation for the surcharge appears in the listing. The landlord has not been publicly identified or quoted in any coverage.

A premium even for Northgate

The listing includes furnishings and all utilities, which typically command a premium over bare apartments. Even so, the $3,250 base rent exceeds neighborhood norms. One-bedroom units in Northgate range from $2,000 to $2,500 per month, according to LeaseBase's 2026 Walnut Creek market data. The citywide average for a one-bedroom is $2,712, according to Rent.com.

With the surcharge, a remote worker would pay $3,450, more than the San Francisco-Oakland-Fremont metro median asking rent of $2,907, as reported in Realtor.com's June 2026 Rental Report.

The listing drew coverage from ABC7 and The US Sun, where one Bay Area resident called the fee "ridiculous."

Walnut Creek does not have its own local rent control ordinance. Landlords of covered units follow California's statewide Tenant Protection Act (AB 1482), which caps annual rent increases at 5% plus the consumer price index, or 10%, whichever is lower.

If the ADU was built within the last 15 years, as its condition and listing language suggest, it would be exempt from those caps entirely. AB 1482 exempts new construction from its rent-increase limits.

No legal expert has publicly addressed whether a work-from-home surcharge constitutes an enforceable lease term under California law.