Product Details

Interior construction can account for 40 - 60% of total building costs - and it’s also one of the most complex aspects to estimate. That’s why the Interiors Square Foot Costbook 2026 Edition is an essential resource for every construction and design professional. This book compiles 65 real-world case studies, meticulously broken down to show square foot costs by interior component across various building types - commercial, educational, civic, residential, healthcare, and more.

Each case study includes detailed project descriptions, contextual insights, and cost breakdowns by MasterFormat® division. This year’s edition also features an updated unit-in-place section covering thousands of individual materials and components, as well as city-based cost modifiers so you can tailor estimates to your geographic region.