Brentwood 16x28

Westview’s Largest Building: Designed for Swim Spas, Pools, and Grand-Scale Entertaining

The Brentwood 16×28 is the largest enclosed building that Westview manufactures in Ultrawood composite. At approximately 16 feet wide and 28 feet long, this is not a gazebo in the traditional sense — it is a full-scale enclosed structure large enough to house a swim spa or in-ground swimming pool, serve as an outdoor recreational room for a large family, or function as a private banquet hall for events and gatherings. The Brentwood 16×28 represents the top end of what is possible with a prefab composite building: commercial-grade size with residential-grade simplicity.

The oversized windows that define the Brentwood collection become truly spectacular at this scale. With windows wrapping the full perimeter of a nearly 450-square-foot structure, the interior is flooded with daylight from every direction. Customers describe the feeling as almost being outdoors — with full protection from weather, insects, and prying eyes. It is the largest room with a view in the entire Westview catalog.

Two-Tier Reinforced Roof with Truss Supports

The Brentwood 16×28 features a two-tier Duraflex PC roof system with reinforced truss supports. At this roof span, structural engineering is not optional — it is essential. The truss-reinforced design distributes snow and wind loads evenly across the structure, ensuring safe and reliable performance in heavy weather conditions. The two-tier roofline also creates an elevated interior ceiling height that makes the space feel appropriately grand for a building of this size.

Ultrawood Composite at Commercial Scale

The Brentwood 16×28 is built from Ultrawood, the same maintenance-free composite material used in every Westview model. At this scale, the benefits of Ultrawood over natural wood are amplified dramatically: imagine the cost and labor of staining, sealing, and maintaining a 448-square-foot wood-framed building every one to two years. With Ultrawood, that ongoing expense drops to zero. The material does not rot, crack, fade, or attract insects, and it never needs painting or sealing.

One customer who researched extensively before purchasing — comparing Westview to steel buildings, custom-built mini houses, open-air pergolas, and covered deck additions — chose the Brentwood because it offered superior quality at a fraction of the price of a contractor-built alternative. They noted that the building far exceeded their expectations and that the composite materials reminded them of Trex decking in quality and durability.

Three Entrances for Maximum Flexibility

The Brentwood 16×28 includes three separate entrances: one set of French double swing doors plus two sliding door entrances. The standard layout positions the swing doors on the 16-foot front side and both sliding doors on one of the 28-foot sides, but all door positions can be customized during assembly since the door and window wall sections share identical dimensions. This three-entrance layout is especially valuable for swim spa and pool house applications where separate access points for the wet area and the dry lounge area improve traffic flow and safety.

Foundation, Permits, and Assembly Planning

Housing a swim spa or hot tub in a structure of this size requires a reinforced concrete pad foundation engineered for the combined weight of the building, the water-filled spa or pool, and any furniture and equipment inside. Westview’s engineering stamped document provides resources for building permits and HOA approvals. Assembly takes a team of three to four people a full weekend. One customer reported that the crate was very large but that the contents were packed in layers for easy unloading, and the assembly instructions were great and easy to follow.

Optional screen kits, tempered glass window upgrades, and roof bracket reinforcements are available individually or as discounted bundles. Affirm financing is available at checkout. If a 28-foot length is more than you need, the Brentwood 16×24 offers the same approximate 16-foot width in a more compact format. Call 1-800-895-1972