The Valrico Detached Parent's Retreat

The story

A homeowner in Valrico needed a fully functional, private residence for an aging parent who wanted to live close to the grandkids while preserving spatial independence, a private entrance, and a full kitchen.

The challenge and site constraints

Zoning caps: Under unincorporated Hillsborough County rules, habitable ADUs are capped at 900 sq. ft. of living space — the design had to land under the cap without feeling small.

Waste system capacity: The main home was connected to municipal sewer, but the lateral sewer line had to be carefully graded and run across 120 feet of yard to meet county tie-in codes.

Zoning setbacks: Standard residential setbacks required a 15-foot rear buffer and a 7.5-foot side buffer.

The Watermark solution

We designed a 24′ × 36′ deluxe single-bedroom suite featuring a full kitchen, a walk-in curbless shower, and zero-threshold exterior doorways for lifetime accessibility.

Our crews ran the trenching and connected the new suite's waste line to the public system. The homeowner monitored layout design, permitting milestones, and structural framing progress in real time through BuilderTrend.

The outcome

The parent moved into a sunlit guest house that reads like a high-end custom home rather than an afterthought — saving the family significant assisted-living cost and keeping everyone close.