About Us

Interior designers & decorators - Longwell + Trapp Architects, PLLC

Longwell + Trapp Architects is a full service Architectural, Planning and Interior Design Firm focused on providing our clients with thoughtful, cost effective, energy efficient, and durable design to meet the clients needs and expectations.

We strongly believe that client service is key. LTA is committed to providing each client and every project with the highest level of design quality, technical expertise, and hands-on principal involvement. Our professional staff prides themselves upon providing the highest level of design, quality communications, accurate contract documents, research, accurate estimates of cost and budgets and meeting client deadlines.

Established in 1981 by Gordon Longwell, LTA has grown steadily in size, capabilities and experience. In 1984 Cory Trapp joined the firm and in 1999 became a partner.

With decades of experience, LTA has evolved into a multi-disciplined firm that serves a broad range of clients throughout the northwest over the past 30 years.

Our diverse clientele has allowed us to provide architectural, planning, and interior design services on a wide variety of project types including government, educational, municipal, offices, medical, mixed use, retail, financial, religious, historical, multi-family and single family residential.

We currently are licensed in Idaho, Washington and Montana.