Fairfax Environmental Inspection & Remediation

Fairfax is tucked into the inland valleys of Marin County, sheltered from the Bay by a series of ridges and surrounded by the open space of the Marin Municipal Water District watershed. The town has a distinct character — locally-owned shops along Broadway, a strong environmental ethic, and a housing stock that runs heavily toward older bungalows and cottages clustered in canyons and on the flatlands around downtown. Neighborhoods like Manor, Forrest Knolls, and the streets near the Meadow Club golf course each have their own micro-climate shaped by canyon orientation and tree cover.

While Fairfax escapes the direct maritime fog that hammers coastal Marin, it sits in creek drainages that collect winter rain and sustain high soil moisture well into summer. San Anselmo Creek and its tributaries pass through town and have historically flooded portions of the lower downtown area. Homes near the creek — particularly the older cottages along Bolinas Road and the Manor neighborhood streets backing the creek corridor — are well acquainted with water intrusion and the mold that follows.

Fairfax's housing skews old even by Marin standards. A significant number of the town's bungalows and craftsman cottages date from the 1910s through the 1940s, when Fairfax served as a weekend retreat destination reachable by the Northwestern Pacific Railroad. These homes were built with wood framing, redwood siding, and materials that are now understood to contain asbestos in floor tiles, roofing felt, and pipe insulation. Many have had minimal structural renovation, and the original materials remain intact beneath multiple layers of paint and flooring.

Canyon shade is a defining feature of Fairfax properties above the valley floor. Homes on the north-facing slopes above Iron Springs Road, the streets within Cascade Canyon, and the upper portions of Scenic Road can go days without direct sunlight in winter. This persistent shade combined with heavy annual rainfall creates chronically damp soil around foundations, elevated crawlspace humidity, and mold growth in bathrooms and closets that lack mechanical ventilation. Radon testing is also warranted on properties at the valley margins where bedrock is nearer the surface.