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Residential | Commercial
Commercial
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City Hall, City of Ontario
(# 418) |
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| Completion |
6 / 2011 |
| Square Footage |
55,000 |
| Budget |
22.5 M |
| Specific Use of Building |
City Hall Administrative, council chambers, executive offices |
| Project Location |
Ontario, CA |
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The Story
City Hall in Ontario, CA is a 55,000 square foot poured in place concrete two story structure constructed in the early 1970’s and sits off of historic Euclid Avenue. The building underwent a $22 million complete exterior and interior renovation and was completed in June of 2011 and was awarded Gold Certification in May of 2012.
Inspiration
The city’s goals for the project was to incorporate Sustainable Design Practices based on GBCI’s LEED Rating System, correct design deficiencies of the building relative to comfort and system efficiencies, bring the building up to current and future technology, create more usable outdoor areas and address the exterior aesthetics and identity of the building.
Special Challenges
While the driving force behind the project included sustainable design practices, some issues were not related to sustainable design. Design solutions took advantage of the sustainable design opportunities and were incorporated into the project. The initial challenge was relocation of city staff, stripping the building down to bare concrete walls and reconstructing. The design team strategically relocated many city personnel. Eventually, some departments were relocated back to the renovated structure and others remained according to the Master Plan. Other challenges included the design of a modern HVAC and electrical system and creation of a living green roof on the south facing roof/patio area.
Design Process
The design approach included meeting with city officials to determine the requirements and project goals. Analysis of the structure and design requirements commenced and schematic designs were presented to the city. After several iterations, design solutions were agreed upon and then executed.
Areas identified included the building entry, a long gable skylight, an existing north-west facing curtain wall at the two story lobby area, unusable exterior planter and patio areas. The design team provided a methodical arrangement of the interiors and created a more efficient space plan to allow future expansion while maintaining space efficiencies.
Final Result
The entry courtyard and lobby structures are designed to give the building more aesthetic and identity from the street. High clerestory glazing at new structures allow light fenestration deeper into the building. The louver system with energy efficient glass curtain walls dramatically reduced the amount of direct sunlight and heat coming into the building. A new north/west facing sloped structure with clerestory glazing at the second floor replaces a skylight, reduces heat gain and allows penetration of indirect light. The exterior aluminum panel system minimizes mass and scale of the existing concrete structure. The new HVAC system is a state of the art system and will earn its merit for energy savings over time. The new lighting, controls and electrical systems, new generator and data room, are designed to accommodate future technology. Many of these elements play an important part of the LEED process in creating an environmentally friendly project.
The project was originally targeted for LEED Silver goal but earned enough credits to be awarded LEED Gold certification. The project has been very well received by the community.
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SBD report:
perf_1_form_1.pdf |
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