Bolthole Index

Clackamas County, Oregon

Zoning, building permits and septic rules in Happy Valley, Oregon

Happy Valley, Oregon, a city in Clackamas County, adopts its own building codes and zoning, and the city's Building Division handles building permits and inspections inside city limits123. Clackamas County's rules for unincorporated land do not govern inside the city4. Clackamas County's Septic Program regulates septic systems where community sewer is not available; we could not confirm how that applies inside Happy Valley5.

At a glance

Building permits
Handled by the City of Happy Valley Building Division, not Clackamas County31
Zoning
City zoning under the Land Development Code, by district2
Septic
Unconfirmed inside city limits; Clackamas County Septic Program serves areas without community sewer5
Accessory dwellings
Allowed in the R-40, R-20 and R-15 residential districts6
Driveways
Single-family driveways need a paved surface and at least 12 feet of width7
Occupancy
City certificate of occupancy approval required8
Property tax
Clackamas County effective rate about 0.9%9

Who to call

Building permits

City of Happy Valley Building Division

Building permit plan review and inspections for construction inside Happy Valley city limits

(503) 783-3800

16000 SE Misty Drive, Happy Valley, OR 97086

Online permits →

Zoning

City of Happy Valley Planning Division

Land use applications, zoning designations and the Land Development Code inside Happy Valley city limits

(503) 783-3800

16000 SE Misty Drive, Happy Valley, OR 97086

Online permits →

Septic permits

Clackamas County Septic Program

Septic system permits, repair and inspection for Clackamas County properties without community sewer; ask here whether a Happy Valley address is covered

503-742-4740

[email protected]

150 Beavercreek Road, 2nd Floor, Oregon City, OR 97045

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

Going off-grid in Happy Valley means bringing your own water and power. The kit we’d start with:

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Does Happy Valley, Oregon have zoning, and what does it mean for building?

Yes. The City of Happy Valley publishes its own Land Development Code, and Happy Valley's zoning covers residential, commercial and employment, institutional and industrial districts, with use and dimensional rules that depend on the district2. Happy Valley's planning staff administer the code from the city's Planning Division, not from Clackamas County10.

In the city's R-40, R-20 and R-15 residential districts, accessory dwelling units are allowed if they meet the city's accessory dwelling standards6. Rules differ district by district, so look up the parcel's district on the city's zoning map before you plan a project. We could not confirm a minimum dwelling size or a short-term rental rule for Happy Valley; ask the Planning Division.

Do you need a building permit in Happy Valley, and who issues it?

Inside Happy Valley city limits, the City of Happy Valley Building Division handles building permits, plan review and inspections3. The city has adopted its own specialty codes chapter and enforces them itself1. Clackamas County's building permit process applies to unincorporated land, and the county notes that incorporated partner jurisdictions may have separate permitting authorities4.

For work done under a city building permit, the permit holder must request inspections on time, keep the work accessible, and make corrections before covering it up11. Permit fees come from the city's fee resolution and are based on the building official's valuation of the work12. For a new home, the Building Division's posted notice also lists system development charges of $12,556 to $12,779 for TSDC and $10,296 to $10,479 for PSDC3. Apply through the city's HV Works portal10.

How do septic permits work inside Happy Valley?

We could not confirm who permits septic systems for addresses inside Happy Valley city limits. Clackamas County's Septic Program regulates septic systems for homes and businesses not served by community sewer, and a county permit is required to install, repair or alter one13. Oregon also says a building inside a sewer district still needs a sewer connection14.

In practice, a Happy Valley lot on public sewer connects to it, and the city lists public sewer among the facilities required before temporary occupancy15. If the lot has no sewer line at the street, call the Clackamas County Septic Program before you buy16. Oregon sets the statewide septic framework, and the Department of Environmental Quality contracts with local jurisdictions in most counties17.

Can you live in an RV or tiny home in Happy Valley?

We could not confirm a Happy Valley rule for tiny homes or for camping on private land inside city limits; ask the Planning Division. Clackamas County's rule that lets an owner place one RV as a second dwelling applies only to unincorporated land outside cities, so it does not apply inside Happy Valley18.

Oregon law lets a person occupy a camping vehicle on private land with the owner's consent only if the lot has safe, approved water and sewage facilities and the occupant meets local sanitation and sewerage standards19. Inside a city that requires public sewer and a certificate of occupancy for occupancy, expect an RV used as housing to meet the city's standards first8.

Building a home in Happy Valley: the steps, in order

  1. Find the parcel's zoning district on the city's maps and confirm the use you want is allowed there2.
  2. Confirm sewer: call the city, and the Clackamas County Septic Program if no sewer line serves the lot16.
  3. Apply for land use approval through the Planning Division if your project needs it, and apply for building permits through the city's HV Works portal10.
  4. Oregon's owner-builder rule is statewide and relaxes certain structural requirements; it does not remove the permit requirement, and we could not confirm how Happy Valley applies it, so ask the Building Division20.
  5. Request inspections on time and keep work exposed until approved11.
  6. Get approval and a certificate of occupancy from the building official before anyone moves in8.

What stays with Clackamas County, and what should you check before you buy in Happy Valley?

Septic questions, and possibly sewer-area questions, run through Clackamas County offices5. Wells are regulated at the state level: an Oregon landowner who builds a well needs a permit and bond from the Water Resources Department21. Land outside the city is a different case; see Clackamas County for rules on unincorporated land.

Check the zoning district, the sewer connection, and the city's driveway standard: single-family driveways must be paved with an approved surface and at least 12 feet wide7. For a new subdivision or partition, the city says a preliminary plat lapses unless it is submitted for recording within three years22. Clackamas County's effective property tax rate is about 0.9%, with a median bill of $5,051923.

Watch-outs

  • Do not use Clackamas County's rules for unincorporated land inside Happy Valley city limits; the county's own page says incorporated partner jurisdictions may have separate permitting authorities4.
  • We could not confirm who handles septic permits, well permits or floodplain development inside Happy Valley; ask the Clackamas County Septic Program and the city's Building Division before you buy5.
  • New dwelling permits carry large system development charges on top of permit fees, so ask the Building Division for a full cost estimate3.
  • We could not confirm a Happy Valley rule on tiny homes, minimum dwelling size or short-term rentals; ask the Planning Division10.

Sources

  1. Chapter 15.08 Specialty Codes and Standards Adopted - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  2. Title 16 Land Development Code - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  3. City of Happy Valley Building Division (happyvalleyor.gov)
  4. How to Apply for a Permit: Building, quoted and re-checked
  5. Septic Program | Clackamas County, quoted and re-checked
  6. Chapter 16.22 Residential Land Use Districts - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  7. Chapter 16.41 Access and Circulation - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  8. Chapter 15.04 General Provisions - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  9. Effective property tax rate: Bolthole Index county data
  10. City of Happy Valley Planning Division (happyvalleyor.gov)
  11. Chapter 15.04 General Provisions - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  12. Chapter 15.04 General Provisions - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  13. How to Apply for a Permit: Septic | Clackamas County, quoted and re-checked
  14. What do I do with the finished material? (Oregon statewide rule), quoted and re-checked
  15. Chapter 15.04 General Provisions - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  16. Clackamas County Septic Program (clackamas.us)
  17. Residential Septic Permitting (Oregon statewide rule), quoted and re-checked
  18. ADUs and RVs as options for secondary dwellings, quoted and re-checked
  19. Oregon Revised Statutes, ORS 446.125 Occupancy on private land (Oregon statewide rule), quoted and re-checked
  20. 2023 Oregon Residential Specialty Code - ORS 455.320 reprinted (Oregon statewide rule), quoted and re-checked
  21. Landowner Constructed Wells | Oregon Water Resources Department, quoted and re-checked
  22. Chapter 16.63 Land Divisions and Property Line Adjustments - City of Happy Valley, OR (Happy Valley), quoted and re-checked
  23. Median property tax bill: Bolthole Index county data

Written October 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Happy Valley

Happy Valley’s own rules

  • Building code adoptedAdopted (with conditions)

    Buildings and structures in Happy Valley.

    • The chapter incorporates the listed specialty codes; the cited section identifies 2022 structural and mechanical, 2023 plumbing, electrical, and residential specialty codes.
    • Where a city-chapter provision conflicts with an Oregon Revised Statute, the statute governs.
    “The following specialty codes, rules and standards are adopted and incorporated herein by this reference as included in this chapter and shall be enforced by the city.”
  • InspectionsRequired

    Work performed under a City building permit inside Happy Valley.

    • The permit holder or authorized agent must request necessary or otherwise required inspections timely, provide safe access and needed equipment, make corrections before covering, and keep work accessible and exposed.
    • Construction activity may not proceed until authorized by the building official or city engineer.
    “It shall be the duty of the permit holder or authorized agent to request all inspections that may be necessary or otherwise required in a timely manner, to provide safe access to the site and inspection area, and to provide all equipment as may be deemed necessary or appropriate by the building official or city engineer.”
  • Certificate of occupancyRequired

    Use or occupancy of structures regulated by Happy Valley Chapter 15.04.

    • Approval of the building official is required.
    • For final occupancy, required private and public improvements and applicable land-use-decision conditions must be satisfied.
    • Temporary occupancy requires structural components to be constructed, inspected, and authorized, including Level 1 facilities such as access, public sewer, public water, and fire/life/safety provisions.
    “No use or occupancy will be allowed without approval of the building official, and the issuance of a certificate of occupancy.”
  • Zoning districtsPublished (with conditions)

    Land inside Happy Valley city limits.

    • Title 16 includes residential, commercial and employment, institutional, industrial, specific-area-plan, and overlay districts; use and dimensional controls depend on district.
    “ARTICLE 16.2 LAND USE DISTRICTS [...] Chapter 16.22 RESIDENTIAL LAND USE DISTRICTS [...] Chapter 16.23 COMMERCIAL AND EMPLOYMENT DISTRICTS [...] Chapter 16.24 INSTITUTIONAL DISTRICTS [...] Chapter 16.25 INDUSTRIAL DISTRICTS”
  • Accessory dwellingsAllowed (with conditions)

    Accessory dwelling units in R-40, R-20, and R-15 residential districts.

    • ADUs must comply with § 16.44.050.
    • The City states that § 16.44.050 establishes locations, site-development standards, and permit requirements.
    “The purpose of this section is to establish appropriate locations, site development standards, and permit requirements to allow for the provision of accessory dwelling units (ADUs) within the City.”
  • Mandatory utility hookupConditional

    Temporary occupancy permits for construction inside Happy Valley.

    • All structural components must have been constructed, inspected, and authorized by the building official or designee.
    • The listed Level 1 facilities include access, public sewer, public water, and fire, life, and safety provisions.
    “A person may receive a temporary occupancy permit when all structural components have been constructed, inspected and authorized by the building official or the official's designee. The structural components include all required Level 1 facilities: access; public sewer; public water; fire, life and safety provisions, etc.”
  • Subdividing landRegulated (with conditions)

    Land divisions, subdivisions, and partitions inside Happy Valley.

    • Preliminary-plats creating, removing, or adjusting lots/parcels are processed under § 16.61.010.
    • Final-plat review for a subdivision or partition uses § 16.63.080 approval criteria.
    • A preliminary plat lapses if the approved plat or survey is not submitted to the Clackamas County Surveyor's Office for recording within three years; it must be recorded within five years.

    preliminary plat recording-submission deadline: <= 3 years (From final decision.) · recording deadline: <= 5 years (From final decision.)

    “The preliminary plat shall lapse if within three years of the date of the final decision for all land divisions, property line adjustments, abandonments, or replat, the plat or survey approved in the decision has not been submitted to the Clackamas County Surveyors Office for recording. The plat or survey shall be recorded within five years of date of the final decision.”
  • Driveway accessRequired

    Driveways serving single-family dwellings or accessory structures serving garages or home occupations in Happy Valley.

    • Approaches and maneuvering areas must comply with applicable City standards.
    • The entire drive must be paved with asphalt, concrete, or an approved permeable or semi-permeable surface.
    • Location and design of accesses to arterials and collectors are subject to City Engineer review and approval.

    minimum single-family driveway width: 12 feet (Single-family dwelling or accessory structure serving as garage or home occupation.)

    “A driveway for a single-family dwelling or an accessory structure serving as a garage or home occupation shall have a minimum width of 12 feet. Driveway approaches and vehicular maneuvering areas must be constructed in accordance with applicable City standards and the entire drive must be paved with asphalt or concrete or an approved permeable or semi-permeable surface.”
  • Permit feesVariable (with conditions)

    Building permits under Happy Valley Chapter 15.04.

    • Fees are provided in Resolution 96-05.
    • The building official determines valuation; permit and plan-review fees use the total value of all construction work and listed finish and permanent-equipment work.
    • The actual Resolution 96-05 fee amounts were not located in the opened official materials.
    “Fees charged under this chapter shall be as provided in Resolution 96-05.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Happy Valley or Clackamas County directly.

  • Owner-builder exemption — Owner-builder work inside Happy Valley.
  • Minimum dwelling size — Dwellings inside Happy Valley.
  • Camping on your land — Temporary camping on private land inside Happy Valley.
  • Tiny homes — Tiny-home occupancy inside Happy Valley.
  • Who permits septic — On-site sewage systems inside Happy Valley.
6 more unanswered
  • Septic permit
  • Septic inspection
  • Well permit
  • Agricultural exemption
  • Building in a floodplain
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Happy Valley publishes no rule on the point, not that none exists. Clackamas County’s page lists the county offices to call.

← All of Clackamas County: county rules, score and offices