Your permit drawings -ready for city approval.

We prepare the complete set of construction drawings your city or county needs to approve your home addition, deck, basement, or garage. Fast turnaround. No hidden fees. Hablamos Español.

Room Additions

We prepare all the drawings your city needs — floor plans, site plans, and structural details — so your addition gets approved fast.

From simple wood decks to covered patios — we know exactly what each city and county in Ohio requires for deck permits.

Turn your unfinished basement into livable space the right way — with drawings that meet local building codes from day one.

Decks & Patios

Basement Finishing

COC Engineers — Your local permit drawing experts

When you need to build a home addition, deck, or basement in Ohio, Indiana, or Kentucky, the city requires a complete set of professional drawings before they issue your permit. We prepare everything — floor plans, site plans, structural details, and elevation drawings — tailored to your city's exact requirements. Our drawings are designed to get approved the first time, without costly corrections or delays. Hablamos Español.

150+ Permits

Approved

15+ years Experience

Trusted Locally

5-Star

Our Services

Permit drawings tailored for home additions, decks, bathrooms, and basements across Ohio and beyond.

Home Additions

Detailed permit drawings that make your room or home addition project smooth and compliant.

Deck & Basement

Accurate plans for new decks and finished basements designed to meet local codes.