Mason, OH - 2026 Building Permit Guide

Permit Authority

The City of Mason Engineering and Building Department administers most permits within the city. Plumbing plan review, permits, and inspections are handled by the Warren County Health Department.

Department

Mason Engineering, Building and Planning

Address

6000 Mason-Montgomery Road, Mason, OH 45040

Phone

513-229-8520

Email

permits@masonoh.org

Website

https://www.imaginemason.org/services/engineering-building-planning/

Online Permit Portal

Application Process

1. Confirm zoning status and whether a zoning certificate or planning entitlement is needed first.
2. Submit the appropriate permit or application through the Mason Permit and Application Portal.
3. Upload plan or drawing materials; Mason requires a plan or drawing so staff can review the project.
4. Obtain any related outside approvals, including Warren County plumbing permits where plumbing is involved.
5. Proceed through city review and issuance, then inspections and final approval or certificate of occupancy as applicable.

Typical processing time: Timing varies by application type and review path; no single citywide turnaround posted

Source: Mason Engineering, Building and Planning

General Requirements

Permits are required before work begins. Commonly required for: basement finishes, bathrooms, decks, electrical work, fireplaces, gazebos, garages, hot tubs, remodels and additions, retaining walls over 30 inches, sheds, pools, porch or patio enclosures, solar work.

Required Documents

• Plan or drawing needed for permit review
• Additional project-specific materials vary by permit type and zoning path

Permit validity

Work must commence within 12 months of plan approval. One 12-month extension may be granted if requested at least 10 days before expiration. Permit becomes invalid if work is delayed or suspended for more than 6 months after the last recorded inspection unless extensions are granted.

Building code

Ohio residential and commercial code administration; plumbing through Warren County Health Department

Contractor requirements

State-licensed trades still apply. No Mason-specific general contractor license requirement found.

Fees

Minimum permit fee

Zoning Certificate $65; many miscellaneous permits $100 plus applicable BBS fee

Plan check fee

Commercial plan review fees listed separately; expedited review doubles the building fee plus $690 engineering site plan review

Permit fee formula

Mixed formulas using area, construction cost, occupancy multipliers, certificate of occupancy fees, and BBS percentages

Reinspection fee

$95 per occurrence

Penalty (no permit)

Work started without permit doubles the base fee; overtime inspection fee is $95 per hour with 4-hour minimum

Payment note

Temporary certificates of occupancy require cashier's checks and separate deposit checks. BBS fees are added at 1% residential and 3% commercial or multi-family.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

• Cabinets
• Carpet
• Gutters and downspouts
• Non-structural repairs and maintenance
• Patio or pavers at ground level
• Play or swing structure
• Roof shingles replacement
• Siding
• Swing set
• Tile flooring

Inspections

How to Schedule

• 513-229-8520 (phone)

Inspection hours

Building department main contact line 513-229-8520

Additional Resources

• Building code: Ohio residential and commercial code administration; plumbing through Warren County Health Department
• Verify contractor license: Ohio eLicense Contractor Lookup
• Zoning information: View zoning info
• Why Get a Building Permit
• Building Process Flow Chart
• Warren County Health Department
• License lookup guide: Ohio Contractor License Requirements
• Contract template: Ohio Homeowner-Contractor Agreement
• Ohio hub: Ohio Contractor License & Permit Hub

Frequently Asked Questions

Mason Building Permit FAQ

Do I need a building permit in Mason, OH?

Permits are required before work begins. Commonly required for: basement finishes, bathrooms, decks, electrical work, fireplaces, gazebos, garages, hot tubs, remodels and additions, retaining walls over 30 inches, sheds, pools, porch or patio enclosures, solar work.

How much does a building permit cost in Mason, OH?

The minimum permit fee is Zoning Certificate $65; many miscellaneous permits $100 plus applicable BBS fee. Fees are calculated as: Mixed formulas using area, construction cost, occupancy multipliers, certificate of occupancy fees, and BBS percentages. Plan check fee: Commercial plan review fees listed separately; expedited review doubles the building fee plus $690 engineering site plan review.

How do I apply for a building permit in Mason, OH?

1. Confirm zoning status and whether a zoning certificate or planning entitlement is needed first. 2. Submit the appropriate permit or application through the Mason Permit and Application Portal. 3. Upload plan or drawing materials; Mason requires a plan or drawing so staff can review the project. 4. Obtain any related outside approvals, including Warren County plumbing permits where plumbing is involved. 5. Proceed through city review and issuance, then inspections and final approval or certificate of occupancy as applicable.

How long does it take to get a building permit in Mason, OH?

Typical processing time is Timing varies by application type and review path; no single citywide turnaround posted.

What work is exempt from building permits in Mason, OH?

The following work is generally exempt: Cabinets; Carpet; Gutters and downspouts; Non-structural repairs and maintenance; Patio or pavers at ground level; Play or swing structure; Roof shingles replacement; Siding; Swing set; Tile flooring.

How do I schedule a building inspection in Mason, OH?

Inspections can be scheduled via: 513-229-8520.

Other cities in Warren County