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The mission of the AIA Design for Aging (DFA) Knowledge Community is to foster design innovation and disseminate knowledge necessary to enhance the built environment and quality of life for an aging society. This includes relevant research on characteristics, planning and costs associated with innovative design for aging. In addition, DFA provides outcome data on the value of these design solutions and environments.

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Residential to commons ratios

  • 1.  Residential to commons ratios

    Posted 09-23-2014 06:47 PM

    I'm looking for a rule of thumb for the ratio of net residential to net commons in an independent living project. Anyone have a typical range?
    John Downie AIA
    John V. Downie, AIA, LEED-AP
    Newton MA

  • 2.  RE: Residential to commons ratios

    Posted 09-25-2014 07:59 AM
    We've found that the % of common space can really vary depending on the context of the project. For what it is worth though, in our newest project (30 apartments, wood framed 3 story double loaded corridor building) we had:

    Apartments:   19500 SF
    Common:        2740 SF
    Onsite mgmt:      435 SF
    Circulation:      4895 SF
    Utility:  1800 SF

    This is all net - we assume about 12% add'l SF to include uninhabitable square footage.

    My experience is that more is usually better - clustered near entry to ensure that common space is used. Common rooms on upper floors tend to not get used unless they are a clear destination (like a work out space).

    Best of luck. You can email me if you have follow up questions.

    Samuel Beall AIA
    Cathedral Square Corporation
    Burlington VT