In the aftermath of the April 18, 1906, earthquake and subsequent fires that devastated San Francisco, the city faced an unprecedented humanitarian crisis. With over 250,000 residents left homeless, the San Francisco Relief and Red Cross Funds, in collaboration with the United States Army, undertook a massive engineering and social project: the construction of 5,610 modular wooden 'relief cottages.' These structures, often referred to as 'earthquake shacks,' were intended as temporary shelters but eventually became the permanent foundation for several of the city’s residential neighborhoods, specifically the Sunset and Richmond districts.
The design of these cottages was a masterclass in early 20th-century efficiency. Developed by the Department of Lands and Buildings of the Relief Corporation, the shacks were constructed using high-grade redwood and fir, materials that were readily available despite the regional chaos. The units were painted a uniform 'Park Board Green' to blend into the public parks where they were initially situated, including Golden Gate Park and Portsmouth Square. This hyper-local response to the disaster created a unique architectural vernacular that persists in a few surviving specimens scattered across the city today.
By the numbers
The scale of the relief cottage project was significant, requiring a logistical feat of manufacturing and transport that rivaled military operations. The following data points summarize the technical and economic scope of the housing effort between 1906 and 1907.
| Metric | Cottage Specification / Value |
|---|---|
| Total Units Constructed | 5,610 |
| Cost per Unit (Type A) | $100.00 USD |
| Cost per Unit (Type B) | $75.00 USD |
| Dimensions (Type A) | 14 feet x 18 feet (252 sq ft) |
| Dimensions (Type B) | 10 feet x 14 feet (140 sq ft) |
| Daily Production Peak | 40 units per day |
| Monthly Rent Charged | $2.00 (applied toward purchase price) |
The Logistics of the Relief Camps
The establishment of the relief camps was governed by strict military-style regulations to prevent the spread of disease and maintain social order. Camp No. 25, located in Richmond, and Camp No. 20, in Hamilton Square, were among the largest. Residents were required to follow a daily regimen, and the shacks were arranged in precise rows with designated communal areas for laundry and cooking. The hyper-local governance of these camps saw the emergence of 'camp mayors'—civilian leaders who acted as intermediaries between the displaced residents and the Army officers in charge of the relief effort.
- Material Sourcing:Lumber was primarily sourced from the Pacific Northwest and local mills in the Santa Cruz Mountains that had survived the quake.
- Sanitation:Each row of 20 shacks shared a communal latrine and a water tap, a significant improvement over the tent cities that preceded them.
- Transport:The shacks were built on skids, allowing them to be easily moved by horse-drawn teams once the city began the process of permanent resettlement.
Transition to Permanent Housing
By late 1907, the Relief Corporation began the process of closing the camps. However, instead of demolishing the shacks, the city offered residents the opportunity to buy them for the cost of construction. The condition was that the shacks had to be moved to private lots. This led to a surreal period in San Francisco history where hundreds of small green cottages were seen being hauled through the streets on rollers. In many cases, owners would bolt two or three shacks together to create a larger, more conventional home.
'The sight of the relief cottages moving across the city became a daily occurrence. A resident would buy a small lot in the then-undeveloped Sunset District, hire a team of horses, and drag their home to its new permanent location. It was the birth of the working-class suburb in San Francisco.' — Excerpt from a 1908 Municipal Housing Report.
The Architectural Legacy of the Shacks
The architectural impact of the earthquake shacks is most visible in the 'hidden' history of San Francisco's residential lots. Many of these structures still exist, though they have been extensively remodeled, sided over, or lifted to include a garage level underneath. For the modern history buff, identifying an earthquake shack requires looking for specific dimensions and roof pitches that match the 1906 blueprints. The preservation of these shacks has become a point of pride for local neighborhood associations, who view them as tangible links to the city’s resilience.
- Type A Shack:The most common, featuring three rooms and a peaked roof.
- Type B Shack:A smaller, two-room variant often used for single men or small families.
- Type C Shack:The rarest, which were larger units created by combining two Type B structures at the factory level.
Sociological Impact and Forgotten Stories
The relief cottages were not just shelters; they were the sites of intense human stories. Police blotters from 1907 record numerous disputes over 'shack jumping,' where individuals would attempt to claim a cottage that had been left unattended during the relocation process. There are also accounts of 'shack beautification' contests, where residents competed to see who could grow the best gardens around their temporary wooden boxes, a sign of the desire for normalcy in a city that was still largely in ruins. The demographic of the shack dwellers was diverse, including Italian immigrants from the North Beach area, Irish laborers, and displaced business owners who had lost everything in the fire.
Urban Planning and the Sunset District
The movement of the shacks to the western part of the city accelerated the development of the Sunset District, which at the time was largely sand dunes. The sudden influx of over 1,000 small dwellings necessitated the rapid expansion of the city's streetcar lines and utility infrastructure. This hyper-local migration pattern fundamentally changed the city's geography, shifting the population center away from the crowded eastern shore toward the Pacific Ocean. The shacks, designed to last only a few seasons, became the anchors of a new urban field that defined San Francisco for the next century.
Today, the San Francisco Earthquake Shacks are recognized as a vital part of the city's heritage. In 2006, for the centennial of the earthquake, several original shacks were restored and displayed in locations like the Presidio. These structures serve as a stark contrast to the modern luxury developments that now dominate the skyline, offering a daily dose of history to those who walk past the unassuming green boxes that once saved a city's population from the brink of total displacement.
