A cedar-clad pavilion that advances backyard bathhouse design for Portland’s wet winters

Project Overview

In Portland’s Alameda neighborhood, Ment Architecture replaced a deteriorated 100-year-old carriage house footprint with a refined cedar-clad pavilion dedicated to backyard bathhouse design. Conceived for year-round use, the compact structure supports sauna, steam, and quiet social time, providing a warm retreat during Portland’s cold, wet season. Planterra Design’s landscape architecture anchors the project within a textured garden of layered plantings and a bluestone patio for outdoor gathering. Together, the building and landscape create a composed architectural expression—minimal in form yet detailed in materiality and junctions.

The cedar-clad bathhouse features a modern design with large windows and a stylized outdoor patio.

Site and Urban Context

Set behind a home in Northeast Portland, the bathhouse operates as a backyard pavilion within a residential block. A long outdoor table extends the interior program into the garden, while dense planting—hakone grass, sword ferns, foamflower, and hydrangeas—establishes seasonal depth and privacy around the compact volume.

A serene outdoor space features a modern bathhouse with sleek glass and cedar cladding, set amid lush greenery.

Backyard Bathhouse Design Concept

The massing reads as a clean, cedar-wrapped volume with a crisp black metal roof. Custom-profile clear cedar rainscreen boards provide a warm, vertical grain and a subtle facade rhythm. Hidden gutters and downspouts keep edges precise, while black-framed openings articulate the envelope with a clear, graphic contrast.

The contemporary cedar-clad bathhouse features contrasting black elements and is surrounded by lush greenery.

Detailing emphasizes clarity at transitions—siding returns, window reveals, and roof edges—reinforcing a contemporary architecture language suited to a small garden structure.

The warm cedar facade features vertical slats, contrasting with modern black window frames.

Spatial Organization

Inside, the plan concentrates wellness and social functions: a large sauna, a steam room, and an oversized tiled shower are paired with a gathering space and kitchenette. A small storage area serves outdoor tools and garden use. The circulation allows groups to move comfortably between hot and cool zones, with the social area as a reset space between sessions and an interface to the patio.

Materials and Facade

Exterior: custom-profile clear cedar rainscreen siding; black-framed windows and doors; black metal roof; concealed rainwater conveyance to maintain uninterrupted lines. Interior: black-stained wood to create a calm, cocoon-like atmosphere; reeded glass for filtered light and privacy; stone and concrete surfaces that register texture under soft lighting.

Light, Climate, and Atmosphere

Triple-paned European windows and doors, combined with an insulated envelope, deliver thermal comfort and acoustic quiet—key to the project’s brief for warmth and calm during heavy rain. Reeded glass introduces diffuse daylight while protecting privacy from neighboring properties. After dark, discreet lighting reveals the grain of wood, the depth of stone, and the tonal shifts across surfaces, sustaining the bathhouse’s intimate character through Portland’s grey winter months.

Design Highlights

New pavilion built on the exact footprint of a former 100-year-old carriage house. Clear cedar rainscreen with custom profiles delivers a refined facade rhythm and durable weathering surface. Hidden gutters and downspouts preserve clean roof and wall lines. Triple-paned European windows and doors support thermal comfort and acoustic control. Black metal roof and black-framed openings sharpen the building’s overall composition. Interior palette of black-stained wood and reeded glass creates a quiet, private atmosphere. Bluestone patio, long outdoor table, and layered planting extend program into the garden. Program includes sauna, steam room, oversized shower, gathering space, kitchenette, and storage.

Key Facts

Frequently Asked Questions

Who designed Alameda Bathhouse and where is it located?

Ment Architecture designed Alameda Bathhouse in the Alameda neighborhood of Northeast Portland, Oregon. Planterra Design led the landscape architecture.

What materials define the exterior and interior?

The exterior features custom-profile clear cedar rainscreen siding, black-framed openings, and a black metal roof with hidden gutters. Interiors are lined in black-stained wood with reeded glass, complemented by stone and concrete surfaces.

How does the building address Portland’s climate?

Triple-paned European windows and doors and an insulated envelope provide thermal comfort and acoustic quiet. Reeded glass admits diffuse light while maintaining privacy, and discreet lighting supports use after dark.

What spaces are included inside the bathhouse?

The program includes a large sauna, a steam room, an oversized tiled shower, a gathering space, a kitchenette, and storage for outdoor tools.