Mitchell Park Domes redevelopment advances with preliminary plans filed and multi-source funding framework taking shape
Phase-one scope and timeline
Milwaukee’s Mitchell Park Horticultural Conservatory—widely known as the Mitchell Park Domes—has moved into a more defined preconstruction stage as the nonprofit Milwaukee Domes Alliance advances the first phase of a long-planned rehabilitation and redevelopment effort.
Preliminary renovation plans have been filed with City of Milwaukee building inspectors for work focused on one of the three signature glass structures, with the start of construction described as targeted for spring 2027. The first phase is estimated at $51.6 million and is expected to prioritize repairs and upgrades tied to the Floral Show Dome and adjacent facilities that support visitor services and programming.
What the first phase includes
Planning documents and project descriptions released through county processes outline a mix of building-envelope restoration and visitor-facing improvements. The largest cost driver identified for the broader restoration effort is replacement of glass surfaces and associated sealing systems. Phase-one work is also described as including mechanical and lighting system updates, upgrades to pathways intended to improve accessibility, and improvements within the Show Dome.
- Show Dome improvements, including building systems upgrades
- Creation of an indoor children’s garden referred to as the “Little Sprouts Dome” within an attached facility
- Conversion of certain spaces to add a café
- Expansion of the gift shop and renovations to the main lobby
Project descriptions also indicate that some greenhouse operations currently housed in an attached structure would be shifted to other greenhouses on the Domes campus, while event activity such as weddings would continue in a portion of that facility.
Funding structure: public commitment with conditions
The financial structure for the Domes’ rehabilitation is described as a layered model combining county participation with other sources typically used in large-scale preservation projects. Milwaukee County has authorized up to $30 million in capital support to be paid over six years, subject to annual appropriation in the county’s capital budget.
The county’s commitment is contingent on the nonprofit securing additional non-county funding before county tax levy dollars are released, a mechanism described as intended to limit taxpayer exposure. Phase-one financing also includes a tax-credit component; project summaries list $12.9 million in county funds and $18.7 million from tax credits within the $51.6 million phase-one total.
Governance and operating changes
Milwaukee County actions approved a long-term lease and development agreement framework intended to shift key responsibilities for the Domes campus to the Milwaukee Domes Alliance while the county retains an ongoing role in horticultural operations. The operating framework has been described as a long-term lease arrangement extending for decades.
County measures tied the release of county capital dollars to the securing of non-county funding and established agreements to govern construction oversight and long-term operations.
What comes next
The Milwaukee Domes Alliance has indicated it is conducting a fundraising campaign “quiet phase,” with additional project information expected to be presented to Milwaukee County’s parks-related policy committee in June. Meanwhile, project planning is continuing to refine phase-one elements to support bid solicitation.
Future phases described in county materials would extend major rehabilitation work to the Desert Dome and Tropical Dome and add additional visitor amenities, including upgraded restrooms and expanded educational and event-oriented spaces. Longer-term concepts also include a Nature Learning Center and a new sunken garden as part of broader site improvements at Mitchell Park.