Home Addition & ADU Engineering

Accessory Dwelling Units are booming across Colorado as cities loosen ADU rules — Denver, Boulder, Fort Collins, Lakewood, and others now allow ADUs in most residential zones. But an ADU is a small building with a full structural requirement: its own foundation, framing, and lateral system, all engineered and permitted. We engineer detached ADUs, garage conversions (where the garage slab and framing get re-evaluated for living-space loads, insulation, and egress), and ADUs above garages (where the garage structure must carry the new second-story loads). We know the code triggers — egress, fire separation, ceiling heights — and we deliver structural plans that coordinate with the architectural set your city will review together.

• Room additions and bump-outs — new foundations, framing, and connections to the existing structure • Second-story additions — the critical evaluation of whether the existing structure can carry the new loads (and reinforcing it when it can't) • Garage additions and conversions — new foundations and living-space conversions • ADUs — detached, attached, above-garage, and basement ADUs • Deck and covered-patio structures — engineered for Colorado snow loads • Sunroom and porch enclosures • Garage-to-living-space conversions Second stories deserve special note: not every existing home can carry a second story without reinforcement. We evaluate the existing structure honestly — before you commit to an architect's design you can't build.

Most addition structural engineering runs $800–$2,500; second-story evaluations and ADU structural packages vary with scope. Plan sets are typically delivered in 2–5 business days, coordinated with your architect or our in-house drafting. Call (888) 305-3967 with your project concept — the assessment is free, and we'll tell you what your jurisdiction will require.