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Hillsboro, OR Building Safety: Plumbing Permits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Adopted code
Oregon Plumbing Specialty Code (OAR 918-750-0110)
Governing section
HMC § 11.04.010(C)
Permit expiration
6 months without inspection approval
Renewal fee
50% of initial permit fee
Alt-energy fee exemption
Permit fee waived for qualifying installs

Summary

Hillsboro enforces plumbing work under the state-adopted Oregon Plumbing Specialty Code, and any plumbing permit the City issues expires if inspection approval doesn't occur within 6 months. A voided permit can be extended once or renewed once for a 50% fee before it must be reapplied for from scratch.

C.Plumbing Code. The Oregon Plumbing Specialty Code, as adopted by OAR 918-750-0110 (2014). ... A.Expiration. If an inspection approval has not occurred within 6 months after a building permit is issued, it is void and no further work may be done at the identified premises until a new building permit has been obtained.B.Extension.1.An inspection approval automatically extends the building permit for 6 months, or until final approval or occupancy is granted if sooner.2.The Manager may extend a building permit once, for a period of 6 months...C.Renewal. A building permit may not be renewed if it has been expired for more than 6 months. A building permit may be renewed once provided:1.It has been expired for 6 months or less;2.No changes have been made in the original plans and specifications for such work;3.A renewal fee of 50% of the initial fee is paid; and4.An inspection approval has occurred since the expiration date.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Municipal Code: Supplement 1 | Community Development Code: Supplement 1).

Full Breakdown

' That adoption is one of eight specialty codes the City adopts wholesale in the same section, structural, mechanical, plumbing, electrical, residential, manufactured dwelling, manufactured dwelling installation, and energy efficiency, so Hillsboro's plumbing standards track the statewide code rather than a locally drafted chapter. 020(A) then governs how long a plumbing permit stays valid once issued: if inspection approval has not occurred within 6 months, the permit is void and no further plumbing work may occur at the premises until a new permit is obtained.

Subsection B lets the permit extend automatically for another 6 months whenever an inspection approval occurs (running until final approval or occupancy if that comes first), and separately lets the Manager grant one additional 6-month extension on written finding that the permittee could not commence or continue work for reasons beyond their control, provided the extension request is filed before expiration and an inspection occurs during the extension. Subsection C allows one renewal of a permit that has lapsed 6 months or less, but only if the original plans and specifications are unchanged, an inspection approval has occurred since expiration, and the applicant pays a renewal fee equal to 50% of the initial permit fee; a plumbing permit lapsed more than 6 months cannot be renewed and requires a fresh application and fee.

030 authorizes the Council to set plumbing permit fees by resolution and lets the Manager update fee tables to match state-mandated valuation data, with any other fee change requiring 15 days' public notice and a written response to comments received. 160, such as a solar water heater, is exempt from the permit fee even though the permit and inspection requirement remains in force; the exemption does not cover later modifications that don't involve new alternative-energy equipment.

Violations & Fines

Chapter 11 sets no plumbing-specific penalty, so unpermitted plumbing work, or work continued after a permit has voided under § 11.04.020(A), falls under the Code's general penalty in HMC § 1.08.010(B): a $500.00 fine, with HMC § 1.08.030 treating each day of continued unpermitted work as a separate $500.00 offense.

Frequently Asked Questions

What plumbing code does Hillsboro enforce?
HMC § 11.04.010(C) adopts the Oregon Plumbing Specialty Code as adopted by OAR 918-750-0110 (2014) as the standard the City enforces for permitted plumbing work.
How long does a Hillsboro plumbing permit stay valid?
Under HMC § 11.04.020(A), it becomes void if inspection approval has not occurred within 6 months of issuance, after which no further work may occur until a new permit is obtained.
Can an expired Hillsboro plumbing permit be renewed?
Once, if it lapsed 6 months or less, the plans are unchanged, an inspection has occurred since expiration, and a renewal fee of 50% of the original fee is paid, per HMC § 11.04.020(C). Anything expired longer must be reapplied for.
Is a plumbing permit fee waived for a solar water heater in Hillsboro?
Yes. HMC § 11.04.040 exempts alternative energy device installations under ORS 469.160 from permit fees, though the permit and inspection itself is still required; modifications to existing equipment don't qualify for the waiver.

Sources & Official References

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