Colleen Gillis


My clients have a vision for the future. I help them obtain the necessary approvals so they can build it.

Colleen Gillis' practice includes representing major developers and national, regional and local companies in all areas of land use entitlement, including office, retail, industrial, mixed-use, residential, hotel and large planned community projects. Her prior experience as a transactional real estate lawyer enables her to effectively and efficiently advise and assist clients on the nuanced interrelationship of entitlement, acquisition, financing and divestment during the life cycle of a given project.

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    Baptiste Yoga


Colleen is a Loudoun County guru. She works with such tenacity on behalf of One Loudoun and Miller and Smith that her role transcends one of being our lawyer, and she functions more as a full member of our team. – Bill May, Miller and Smith

  • University of Richmond School of Law
    JD, cum laude, 2000

  • University of Virginia
    BA, English and Foreign Affairs

Admissions & Credentials



  • National Association of Industrial and Office Properties (NAIOP)

  • Urban Land Institute

  • Virginia Bar Association

Rankings & Accolades

    Loudoun Business Journal: "Woman to Watch" (2017)

    Chambers USA: Band 1 (2021-2022), Band 2 (2016 – 2020); "Up and Comer" in Real Estate: Zoning/Land Use: Northern Virginia (2011 – 2013)

    Legal 500: Recognized for work in Real Estate and Land Use/Zoning

    Best Lawyers in America (2013 – 2019)

    Washington Business Journal: Power 100 (2016)

    Law360 "Rising Star": One of only six Real Estate lawyers in the country (2013)

    SmartCEO: Power Players Award, Washington (2014)

    Leesburg Today: "40 Under 40" Award (2013)