The charts included are mostly based on the San Francisco Planning Department’s excellent Housing Inventory and Pipeline reports, which can be accessed using the links at the bottom of this article. Quotes below are excerpted from these reports.

Packed with information, the data in one report section will not always agree perfectly with that in another – due to the multiple sources of data used by the Planning Department – and this is reflected in our charts as well. In the complex, lengthy process of new-housing application and review, public hearings (and, lately, ballot proposals), revisions, entitlement, permitting, construction and completion, how and when a project is counted may vary. Housing units are being built and being removed, and there are so many types: rental or sale, market rate or affordable, social-project housing or luxury condominiums.

Last but not least, this landscape is in constant flux – new projects, plan changes, and shifts in economic and political realities. Everything below is simply a good faith estimate. The basic reality is that San Francisco, after its recent 2008-2012 new-construction slump, is now experiencing a building boom. So far, however, it has not been able to keep up with population growth and rising buyer/renter demand.

Adjusting your screenview to zoom 150% will make the charts that much easier to read.

A glance at the recent past, the present and the possible future of new housing construction in the city. New projects are continually entering and moving through the pipeline, and existing plans may be changed or even abandoned.

“There are currently 857 projects in the pipeline. Of these, 74 percent are exclusively residential and 17 percent are mixed-use projects with both residential and commercial components. Only 8 percent of projects are non-residential developments. A net total of 50,400 new housing units would be added to the city’s housing stock according to current data. Around 18 percent of all projects, representing 6,000 net added housing units and 2,750,000 sq. ft. of commercial space, are under construction. Around 20 percent of projects (with another 4,200 net units and 3,8 million sq. ft. of commercial space) have received building permit approvals. As of the time of writing, some may have moved to the construction phase.”

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We haven’t found an easy place for construction data by unit size, so this chart is extrapolated from the last 7 years of SF MLS sales of condos built 2001 -2014. It may not apply perfectly to units built as apartment rentals or affordable housing.

Typically, the smaller the unit, the higher the dollar per square foot value on sale or rental, however in San Francisco, 3+ bedroom condos are often high-floor units with spectacular views that sell for extraordinary sums – but these would be outliers to the general rule. The city plan appears to have a bias for 2-bedroom units, which it designates as “family units” – this may be an anachronism considering that 38% of city residents live alone and that SF has the lowest percentage of children of any major U.S. city. Of course, many singles and couples like to have a guest bedroom or home office.

However, in 2012, the city agreed to allow the construction of 375 “micro-units,” apartments of 220 to 300 square feet, including kitchen and bath. A few dozen have been built – one article mentioned a rental rate of $1850/month – and another 160 are under construction in the mid-Market area. It will be interesting to see how this trend develops (or doesn’t) in both the rental and for-sale markets. It might be a good match for the relatively young (but well paid), non-driving, high-tech workers pouring into the city.

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New construction has been concentrated in a few specific districts of the city, mostly where higher density housing projects are most viable. “The ‘hot spot’ for much of this development is Market Street at various sections of it.”

The ability to take under-utilized commercial property sites and turn them into multi-unit or even high-rise residential projects is particularly prized: “There are 50 projects in the current pipeline data­base proposing demolition or conversion of existing [commercial] build­ings to residential use.” “Nearly all units replacing office uses are in mid- to high-rise residential structures of 20 to 500 housing units in high density zoning districts. These projects are mostly concentrated in the eastern half of the city: Rincon Hill, East SoMa, Showplace Square & Potrero Hill, Transbay, Mission and Downtown.”

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Three issues regarding new condo construction: the year in which a project is designated as “completed” in city reports can vary, depending on the department and the dating of events within the process (so this chart won’t perfectly tally with others). Secondly, some developers build and record the units as condos but then rent the units instead of selling them. Finally, new housing projects are now typically required to sell or rent about 15% of units under affordable-housing rules. All these factors affect how new condo construction impacts rental and sale markets.

“Single-family building construction made up a very small proportion of new con­struction in 2013 (1%).” Very few new houses are built in San Francisco, as developers prefer to build higher density housing projects on our limited supply of land. The houses that are built are typically big and expensive.

“Seventy-six percent of the condominium conver­sions in 2013 (279) were in buildings with two or three units.” The rules governing condo conversion in San Francisco are byzantine, politically-wrought and ever-changing, and the changes affect the ability to convert existing multi-unit properties and TICs into condominiums. Two-unit properties are much the easiest to convert into condos and accordingly enjoy a sale price premium.

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The first golden age of SF apartment buildings, many of which were later turned into condos, was in the period of 1920 – 1940: The units in these buildings are large, light, gracious and filled with elegant detail. Pacific Heights and Marina are filled with these buildings. Though there are beautiful condos built in other eras (Edwardian flats, Art Deco apartments), the second golden age really arrived with the latest burst of new-condo construction, built for an increasingly affluent population: These units are ultra-modern, high-tech and feature highest quality finishes and amenities. They are exemplified by the new, luxury high-rises of the greater South Beach-Yerba Buena area, though variations on this theme, in non-high-rise form, have been springing up all over the city.

The units in these newer buildings command a premium both when rented or, as seen in the chart above, when sold – now surpassing an average dollar per square foot value of $1000. This is the major motivator for developers today.

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New housing typically conjures images of new condo developments, but it’s more complicated. Within new market-rate condo and apartment projects – rental housing construction has also been jumping with the recent large spikes in rents – typically 15% of units are required to be affordable housing: 220 of these “on-site” units were built in 2013. Add in social-project housing of one kind or another, and 36% of all new units built in 2013 were affordable housing. These units are allocated, rented and sold under rules and formulas pertaining to social and economic circumstances and housing cost.

“About 93% of the new affordable units are rentals affordable to very-low and low-income households.”

“Major affordable housing projects completed in 2013 include: 25 Essex Street (120 units); 701 Golden Gate Avenue (100 units); 474 Natoma Street (60 units); 1075 Le Conte Avenue (73 units); 60 West Point Road (54 units); and 61 West Point Road (13 units).”

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There are not only new housing units being built, there are existing housing units being removed from the city’s inventory of housing stock – demolished, merged (2 or more legal units into 1) and abated (illegal units): one less the other equals the net housing unit increase.

There is currently proposed legislation to encourage the legalization of illegal housing units in San Francisco, estimated to exist in the tens of thousands. This is problematical because the reason most of these units are illegal to begin with is that they don’t conform to housing codes – ceiling height, light and ventilation, and fire safety issues are most common – and cannot easily, without substantial expense, be altered to comply.

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This is another approximate snapshot of how general economic conditions affect new housing construction. When the financial markets crashed in 2008, new construction went into a tailspin due to demand and financing issues. As the economy has recovered, it has sprung back to life – as is clear by all the cranes stalking the city’s lots. Like most financial markets, real estate development has economic cycles – cycles that often include dramatic booms and crashes. This is exacerbated by the length of time between a developer’s initial plan and land purchase, and the completion of the project, which often runs to years. It can be difficult enough to predict what market conditions will be next month, much less in two, three or more years.

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We created this chart in 2013 with data compiled from a variety to sources we deem reliable. All the numbers should be considered very approximate – and they are constantly changing – but the chart is generally representative of the existing housing breakdown in San Francisco.

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New home construction in the Bay Area is currently concentrated in 3 of the 4 hottest rental and/or purchase markets in the country: the greater Silicon Valley area, San Francisco and the East Bay. Of course, much of this is directly related to surging high-tech employment and wealth.

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What ultimately underpins new housing construction is demand. Below are two charts illustrating the white hot rental and sale markets in San Francisco, which are motivating investors and developers to build new homes, and motivating the city and non-profits to accelerate the construction of affordable housing units as well (a very big political issue right now).

From 2010 to 2013, the city added approximately 32,000 residents and increased the number of employed residents by roughly 56,000, many of them in new, well-paying high-tech jobs. In that same period, about 4,200 new housing units were added, not remotely adequate to meeting demand. And it is currently projected that the city’s population will continue to grow in coming years. When demand soars and supply is inadequate, prices and rents go up (in the city’s recent case, feverishly), and builders start building again as quickly as they can, hoping to catch the wave at exactly the right time.

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Below are image- links to the actual SF Planning Department Pipeline and Housing Inventory reports issued in February and April 2014, upon which many of the above charts were based. They contain huge amount of data, which we have attempted to represent accurately. As noted by their authors, who did an incredible job compiling the data, the original reports themselves are “compiled and consolidated from different data sources and subject to errors due to varying accuracy and currency of original sources.”

And this image-link goes to a flowchart of the Planning Department’s
review and approvals process: