L.A.’s future housing, need for green space

Re “Tall, Green, Vital: L.A. as Mayor Dreams It,” Feb. 19

Much of what Los Angeles Mayor Antonio Villaraigosa imagines for the future makes sense. He argues correctly that higher density is not only compelling but close to inevitable. But he is getting bad advice about high-rise housing as a future model. Setting aside the problems associated with earthquakes, fires and terrorism, there is an equally critical problem: tall buildings cast long shadows.

A 50-story building in Los Angeles casts a midwinter shadow that covers two city blocks. Within that shadow, the sun’s energy cannot be used as a source of heat, light or electricity. Roof gardens, terraces and parks are left dark and cold.

Research over 20 years at USC’s School of Architecture has proved that, when solar access is achieved by using a zoning concept called the solar envelope, buildings of three to seven stories can easily provide ample urban densities in the range of 80 to 100 dwelling units per acre with heat, light and cross-ventilation for every unit and with energy from solar collectors.

With zoning for solar access, the mayor’s objective of higher density can be met while enhancing the quality of urban life. We can have courtyards and green roofs for gardens while still providing the density required for a sustainable and vibrant city.

RALPH KNOWLES

Professor Emeritus

USC School of Architecture

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Why must Angelenos be forced to choose between ranch houses and hulking apartment blocks? Multi-unit dwellings needn’t be monoliths that eat green space and isolate their inhabitants from street life. Chicago’s two- and three-flats, San Francisco’s duplexes and New England’s three-deckers provide plenty of green space for their inhabitants. Closer to home, how about the bungalow courts of Hollywood and the Spanish Colonial duplexes of Mid-Wilshire? At the very least, how about making it easier to build “granny flats” over garages?

PETER MCFERRIN

Los Angeles

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The Times’ article spoke about the greening of Los Angeles as a major goal for Villaraigosa. In South-Central L.A., a 13-year-old community farm serving 350 low-income families is threatened with destruction. This would deprive families of fresh food, healthful work and a community activity and center. Surely the mayor and City Council can save this needed community resource.

DORIS ISOLINI NELSON

Los Angeles