I have represented historic/sustainable properties since 1995 and know the HPOZ regulations very well. My clients include Los Angeles EcoVillage and the urban homesteading school, Village Play Garden, as well as a number of individual clients, including architects and investors.
I regularly lecture on environmental urbanism and environmental factors in urban and regional planning in local universities. In addition, I consult on urban water conservation issues, including low impact development.
Please let me know if I can be of assistance directly to you or can recommend a professional from my sustainability network if your geographical needs are Westside, San Fernando Valley, or South Bay based.
Keller Williams Realty
Los Feliz Market Center
Los Angeles, CA
We have a historical division in Coldwell Banker. Many of us have had training from this division as well, but if you want specialists..that would be the place. Jan Horn comes to mind who heads up this division http://.www.janhorn.com (tell him I sent you)