Benton County, OR Building Setbacks & Zoning: Structure Height Limits (2026)
Key Facts
- Max height, Rural Residential zone
- 40 feet (BCC 63.405(10))
- Exempt features
- chimneys, spires, towers, flagpoles, agricultural buildings
- Same 40-ft cap
- Urban Residential, Village Residential, Urban Commercial zones
- Philomath High-Density Residential cap
- 35 feet
- Over the cap
- requires a variance, BCC Chapter 53
Summary
In the Rural Residential zone of unincorporated Benton County, BCC § 63.405(10) caps structures at 40 feet in height. Chimneys, spires, domes, towers, flagpoles and similar features not used for human occupancy are exempt from that limit, and the same 40-foot cap applies across most other residential and commercial zones.
63.405 - Siting Standards. All structures allowed in the Rural Residential Zone shall be sited in compliance with BCC Chapter 99 and the following additional standards: ... (10)A structure shall not exceed 40 feet in height. Structures such as chimneys, spires, domes, elevator shaft housings, towers, aerials, flagpoles, agricultural buildings, and other similar objects not used for human occupancy are not subject to the building height limitations of this code.
Full Breakdown
405(10), the siting standards for the Rural Residential (RR) zone, sets a maximum structure height of 40 feet. 040(4)). The RR height cap carries a built-in exemption: chimneys, spires, domes, elevator shaft housings, towers, aerials, flagpoles, agricultural buildings and other similar objects not used for human occupancy are not counted against the 40-foot limit, so a barn cupola or a ham-radio antenna does not need a variance the way an occupied second-story addition would. A property owner proposing a taller structure, such as a three-story home or a detached shop with a loft, must apply for a variance under the general review criteria in BCC Chapter 53 rather than build over the cap.
The Planning Official reviews building permit applications against this standard before issuance under BCC Chapter 11's adopted Oregon specialty codes. This 40-foot cap governs unincorporated county land only; Corvallis and Philomath apply their own height limits inside their urban growth boundaries and city limits.
Violations & Fines
Exceeding the 40-foot height cap without an approved variance is a Development Code violation. Community Development can issue a stop-work order mid-construction under BCC Chapter 31's escalating enforcement, and a building permit built out of compliance can be suspended pending correction. BCC § 31.125 authorizes a fine of $500 per violation, $1,000 if the violation continues, pursued in circuit or justice court.
Frequently Asked Questions
How tall can I build a house in unincorporated Benton County?
Does a chimney or antenna count toward the height limit?
What if I want to build taller than 40 feet?
Sources & Official References
Other rules in Benton County
Compare Benton County to another location·View the Oregon building setbacks & zoning overview
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