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Rendering of the Crane Creek Residence at dusk: a custom home with standing-seam black metal roofs, vertical wood siding, white plaster walls, and a glazed gable overlooking the Boise foothills.

Crane Creek ResidenceCustom HomeDesigned

Homes. ADUs.Small developments.Built thoughtfully in Boise.

Fortis is a Boise builder and developer creating considered residential projects from the first property decision through construction.

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We think beyond the build.

Good residential projects start long before construction. Fortis brings the perspective of both a builder and developer to decisions about property, design, budget, constructability, and execution.

The goal is simple: make better decisions early, then build well.

What we build

  • Custom Homes

    Individual homes shaped around the property, architecture, budget, and the people who will live there.

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  • ADUs

    Thoughtfully designed accessory dwelling units that create useful living space and long-term flexibility from an existing property.

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  • Residential Development

    Small residential developments approached with the discipline of a builder and the perspective of an owner.

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Selected Work

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Walnut cabinetry and a green glazed tile backsplash in the 25th Street ADU kitchen, with the island and stainless hood to the right.

ADU Feasibility · Powered by Parcept

Before you design an ADU, understand the property.

Parcept analyzes your Boise property for ADU feasibility — including zoning, lot conditions, existing structures, access, and key site constraints — before you spend money on design.

Check Your Property for an ADU

Powered by Parcept, Fortis Building Co.’s ADU property-intelligence platform.

Process

A better project starts before construction.

  1. 01

    Understand the Property

    We evaluate the site, constraints, opportunities, and project goals before design begins.

  2. 02

    Define the Project

    Architecture, engineering, scope, cost, and strategy are aligned before construction.

  3. 03

    Build Deliberately

    Clear scopes, active project management, and strong trade relationships guide execution.

  4. 04

    Finish Well

    Details matter through the final stage of the project, not just at the beginning.

Built here.

Fortis is based in Boise and focused on residential projects throughout the Treasure Valley. We understand the neighborhoods, land, permitting environment, trades, and realities of building here.

Have a property or project in mind?

Tell us where you’re starting. It doesn’t need to be fully figured out yet.

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