Engineering turns your design drawings into safe, code-compliant, stamp-ready plans. Without it, nothing gets built — and nothing gets permitted.
Find Engineering Professionals →A beautiful set of design drawings is just artwork until an engineer stamps it. Engineering converts your architect's vision into a set of plans that a contractor can actually build from — with calculated beam sizes, foundation depths, seismic bracing, and MEP system layouts that meet California code.
California has some of the strictest engineering requirements in the country. Seismic zone requirements, Title 24 energy compliance, fire sprinkler mandates, and soils-driven foundation design all require licensed engineers to review and stamp your plans before a building department will issue a permit.
Many homeowners underestimate how much back-and-forth happens between engineer and designer. PlanLoft helps you sequence this correctly and matches you with engineers who have a track record of first-pass approvals in your city.
Structural engineers design and stamp the structural elements of your project — foundation systems, framing, beams, columns, shear walls, and seismic bracing. In California, their stamp is required for any project that involves structural changes to a building. They work from your designer's drawings and produce a separate structural drawing set.
Civil engineers handle everything outside the building envelope — grading plans, drainage design, utility connections, erosion control, and stormwater management. For new construction or projects with significant site work, a civil engineering set is required alongside the architectural and structural drawings. They also prepare SWPPP plans for larger projects.
MEP engineers design and document the mechanical (HVAC), electrical, and plumbing systems of a building. For commercial, multifamily, and larger residential projects, stamped MEP drawings are required for permit. They coordinate with the architect and structural engineer to ensure systems fit within the building's structure and meet code requirements.
Title 24 consultants prepare the California Energy Code compliance documentation required for any new conditioned space in California. This includes the CF1R compliance certificate, insulation requirements, window performance specs, and HVAC sizing calculations. Their report is a required component of virtually every residential permit in California.
Your engineer needs finalized design drawings to work from. Once engineering is stamped, you're ready to submit for permit.