How a regional shopping mall anchored foot traffic with a year-round indoor splash pad
A composite case study of a Class-B regional shopping mall that converted a vacant anchor-tenant footprint into a 12,000-square-foot indoor splash pad as a climate-controlled, 365-day family-traffic anchor.
Summary
A Class-B regional shopping mall in suburban Minnesota converted a 28,000-square-foot vacant department-store footprint into a $4.2M indoor splash pad and family-entertainment anchor, operating 365 days per year in a climate-controlled environment. Year-one attendance hit roughly 285,000 visits, mall-wide weekend foot traffic rose by an estimated 22%, and the conversion has become a regional case study for repositioning Class-B malls. The model requires roughly $4M+ capital and a mall owner willing to invest in a 10-year repositioning thesis.
Key metrics
Background: a Class-B mall and a vacant anchor box
Northgate Galleria is a 940,000-square-foot regional shopping mall built in 1978 in suburban Bloomington, Minnesota. The mall had been a Class-A regional center through the 1990s but slid to Class-B status during the 2000s and 2010s as anchor tenants closed sequentially. By 2022, two of the mall's four original anchor footprints sat vacant, including a 28,000-square-foot former department-store box that had been dark since 2019. The mall's current owner, a regional real-estate investment firm specializing in Class-B mall repositioning, had spent three years searching for a viable anchor tenant before concluding that the traditional retail anchor model had structurally collapsed for the property's market position. A repositioning consultant retained in 2023 produced a 60-page strategic plan recommending three family-entertainment anchors (an indoor splash pad, a trampoline-park-and-arcade, and a children's-museum-style discovery center) instead of a single retail anchor. The splash pad was the first of the three to be approved, designed, and built.
Funding model: mall-owner capital with a 10-year repositioning thesis
The $4.2M capital came entirely from the mall owner's repositioning capital fund, with no public funding involved. The funding decision rested on a 10-year repositioning thesis: that the splash pad's foot-traffic anchor effect would lift mall-wide weekend traffic by 15-25%, which would in turn support rent recovery from existing tenants on lease renewal cycles and accelerate leasing of remaining vacant inline space. The mall owner's underwriting model assumed the splash pad would not need to generate positive standalone returns through admission revenue alone — admission revenue was projected to cover roughly 70% of operating costs, with the remaining 30% absorbed as a marketing-and-leasing investment recoverable through rent uplift on the broader 940,000-square-foot asset. The financial model was approved by the firm's investment committee on a unanimous vote and represents the largest single repositioning capital deployment in the firm's portfolio history.
Design choices: indoor climate, year-round operations, premium experience
Indoor splash-pad design differs sharply from outdoor design across nearly every specification. The 12,000-square-foot pad (within the 28,000-square-foot anchor footprint, with the remaining 16,000 square feet allocated to changing rooms, party rooms, café, equipment, and circulation) operates in a climate-controlled environment held at 84°F air temperature and 80°F water temperature year-round. The HVAC system is sized for both temperature and humidity control, with dehumidification a major operating-cost driver. The pad includes 42 features across four zones, including a large signature feature (a 60-gallon tipping bucket cycling at 3-minute intervals) that would be excessive for an outdoor toddler pad but reads as appropriately spectacular for a paid indoor experience. The design also includes premium amenities not typical of municipal pads: 18 private cabana-style seating areas (rentable in 2-hour blocks), a full café and quick-service restaurant, six private party rooms (booked through an online reservation system), and a retail shop selling swim diapers, towels, and licensed character merchandise. The design firm specifically had family-entertainment-center experience rather than municipal aquatic experience, and the design language reads more like a premium recreation venue than a public pool.
Construction timeline: 14 months from approval to opening
The mall owner approved the project in October 2023. Design ran October 2023 through March 2024, including extensive HVAC engineering work for the unusual indoor-aquatic environment. Demolition of the vacant anchor box's interior fit-out ran April 2024, with the original retail circulation, fixtures, and HVAC stripped to the structural shell. Mechanical infrastructure (recirculation tanks, filtration, dedicated HVAC for the wet zone, makeup-air units) ran May through August 2024. Pad construction (slab pour, feature installation, finish work) ran September through November 2024. Commissioning (water-quality verification, HVAC balance, occupancy permitting, life-safety verification) ran December 2024. The facility opened over the holiday-shopping weekend in mid-December 2024, deliberately timed to capture the highest-traffic shopping window of the year and generate maximum first-impression visibility for both mall tenants and the regional family-destination market.
Opening reception: lines through the food court
Opening day was deliberately ticketed (free admission, but reservation-required) to manage capacity. Roughly 4,200 reservations were claimed within 36 hours of the booking site going live, and the facility ran at peak capacity (700 simultaneous occupants) for most of the day. The lines for adjacent food-court tenants ran to 45-minute waits at lunch, and three inline tenants reported their highest single-day sales since 2014. Mall-wide foot-traffic counters, which had been baselined for the prior 90 days, registered a 38% weekend lift in the first month and stabilized at roughly 22% above baseline through the first six months. Inline tenant rent renegotiations on three lease renewals during the same period landed roughly 18% above pre-opening pro-forma rents. The mall owner's investment committee subsequently approved the second family-entertainment anchor (the trampoline-park-and-arcade) at a March 2025 capital review.
Operating economics: admission revenue, café, and rent uplift
Year-one operating costs landed at approximately $640,000, broken down as roughly $310,000 in labor (one general manager, one assistant manager, six full-time pad supervisors and certified pool operators, eight part-time staff across café and admissions), $96,000 in HVAC and dehumidification energy, $48,000 in water and sewer, $32,000 in chemistry, $74,000 in supplies and maintenance, $42,000 in insurance, and $38,000 in marketing. Admission revenue at $14 per child and $4 per adult observer generated approximately $480,000, café and birthday-party revenue added approximately $86,000, retail added approximately $18,000, and cabana and party-room rentals added approximately $42,000 — totaling roughly $626,000 in standalone revenue, slightly below standalone operating breakeven. The remainder of operating costs were absorbed against the broader mall-leasing economics through the underwriting framework, with the mall owner's CFO reporting roughly $1.6M in annualized rent uplift attributable to the splash-pad foot-traffic anchor effect.
Operational realities: chlorine, humidity, and the indoor-air challenge
Indoor splash-pad operations involve operating challenges that outdoor pads do not face. The two largest are chloramine off-gassing (a mix of chlorine and organic-nitrogen compounds that produces the characteristic 'pool smell' and creates respiratory-irritation risk in indoor environments) and persistent high humidity (which damages building envelope, electrical, and finish materials over time). The Northgate facility addresses chloramine through a UV-treatment skid (which breaks down chloramines at the recirculation point) and a dedicated air-handler system designed to push exhaust air directly outdoors rather than recirculating into the broader mall. Humidity is addressed through a 4-zone dehumidification system, vapor-barrier construction across all wet-zone walls and ceilings, and stainless-steel structural members in any element exposed to wet-zone humidity. Initial operating months surfaced two issues — a chloramine breakthrough during a high-bather-load weekend (resolved through a UV-skid recalibration) and visible moisture migration through one corner of the wet-zone wall envelope (resolved through a $14,000 vapor-barrier patch). The facility's general manager reports that ongoing monitoring of indoor air quality and humidity is the single most operationally-attentive function of the role.
Replicability: what kinds of malls and markets work
The Northgate model is replicable for Class-B and Class-C regional malls with three preconditions. First, a vacant anchor footprint of 25,000–35,000 square feet with adequate ceiling height (24+ feet preferred) and mechanical-room access. Second, a mall owner with $4M+ in repositioning capital and the underwriting discipline to evaluate the investment against rent-uplift returns rather than standalone admission economics. Third, a regional market with sufficient family demographic depth to support 250,000+ annual visits at premium admission pricing. The model is less useful for top-tier Class-A malls (where vacant anchor space is rare and rent uplift is already maximized), for very small markets where 250K+ annual visits are not achievable, or for malls without the architectural envelope to support the structural humidity loads. Roughly 80–120 Class-B malls in the United States meet the preconditions, of which a small number have begun pursuing similar repositioning playbooks.
Long-term considerations: 10-year refresh and the changing family-entertainment market
The mall owner's 10-year underwriting includes a planned $1.2M mid-life refresh at year five, scheduled for early 2030, primarily addressing feature replacement, finish refresh, and HVAC component replacement. The longer-term question is whether the family-entertainment-center category itself will continue to occupy the role currently filled by the splash pad in driving family-destination foot traffic. The mall owner's strategic-planning team monitors competing categories (immersive virtual-reality experiences, bowling-and-eatertainment hybrids, indoor adventure parks) and treats the splash pad as one rotating anchor in a 20–30 year mall-evolution thesis rather than a permanent fixture. The current operating thesis is that indoor splash pads will retain primary family-destination status through at least 2035, after which competitive repositioning may be needed.
Voices from the project
“We weren't building a splash pad. We were buying ourselves another fifteen years of relevance for a 1978-vintage mall. The pad happens to be how we did it.”
“The chloramine air-handling system is the single most-engineered thing in the building. Get it wrong and you have a respiratory complaint, a lawsuit, and a closed facility within a year.”
“Three of our food-court tenants told us their highest single-day sales since 2014 were in the first month after the pad opened. That's the rent-uplift thesis in one anecdote.”
Lessons learned
- Underwrite indoor mall splash pads against rent uplift across the broader asset, not standalone admission economics.
- Specify HVAC and dehumidification engineering at parity with — or above — the wet-system engineering itself.
- Use a UV-treatment skid to control chloramine off-gassing, with a dedicated wet-zone exhaust air-handler.
- Plan for a $1M+ mid-life refresh at year five; family-entertainment-center category itself is rotating.
- Time opening for a high-traffic retail window (holiday or back-to-school) to maximize first-impression visibility.
- Build premium amenities (cabanas, party rooms, café) into design — they unlock 25%+ of standalone revenue.
- Treat ongoing indoor air-quality monitoring as the most operationally-attentive function of facility management.
FAQ
How much does an indoor mall splash pad cost to build?
Representative range is $3.5M–$6M for a 10,000–14,000 square foot pad within a 25,000–35,000 square foot anchor footprint, including HVAC, dehumidification, chloramine controls, premium amenities, and tenant-improvement build-out. The Northgate composite came in at $4.2M for 12,000 square feet of pad within a 28,000 square foot footprint.
What is the operating-cost difference between indoor and outdoor splash pads?
Indoor pads cost roughly 6–10x outdoor municipal pads to operate annually, primarily because of HVAC and dehumidification energy ($90K+ annually), 365-day labor staffing, chloramine air-handling, and elevated insurance and indoor-air-quality monitoring requirements. The Northgate composite operates at roughly $640K annually versus typical outdoor-municipal pads at $60K–$110K.
Can an indoor mall splash pad be financially self-sustaining on admission revenue alone?
Generally no — most indoor mall splash pads break even or run modestly negative on standalone admission, café, and party-room revenue, and the financial case rests on rent uplift to surrounding mall tenants and accelerated leasing of vacant inline space. Mall owners pursuing the model should underwrite against the broader asset, not against admission-revenue alone.
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