Dan Mihai Ionescu


Strategic regional planning, urban design, town planning, mixed-use, sustainable design, year-round resorts and hospitality villages, residential, new homes, remodeling, space planning, interior design, sound and noise control, additions, in-law units, work/live units, lofts & penthouses, seismic upgrades, permit procedures, historic preservation, due diligence, and feasibility studies.


Master of Architecture and Urban Design International Institute of Architecture and Urban Design Bucharest, Romania.

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Dan Ionescu, NCARB, AIA is the founder and principal of Dan Ionescu Architects & Planners (DIAP), an international planning and architectural design firm based in San Mateo, California. Since 1982, Mr. Ionescu has been leading his innovative international staff to complete sophisticated planning and design projects, ranging from redevelopment of old rural areas in Europe and regional urban planning in China, to residential architecture and large mixed-use projects in urban areas in the United States and Europe. DIAP is currently working on projects in the United States, China, Argentina, Norway, Romania, and Costa Rica.

Mr. Ionescu brings his site-specific approach and extensive international experience to each project. He excels at designing for complex programs. Mr. Ionescu considers the environmental, historic, demographic, political, and economic aspects of an area and brings them together to form a comprehensive strategic plan. DIAP draws from Mr. Ionescu's forward-looking planning principles and global experience with outstanding results, developing successful strategic plans and urban designs to match the character and objectives of each project.