Weber County · 17,716 residents
South Ogden ADU rules
South Ogden: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 10,000+ sq ft). Owner occupancy applies.
Internal ADU (inside the home)
Detached ADU (backyard building)
Not yet fully verified · last reviewed September 7, 2026 See sources
South Ogden ADU rules at a glance
| Rule | Internal ADU (basement, attic, inside the home) | Detached ADU (backyard building) |
|---|---|---|
| Allowed? | Allowed | Allowed |
| Minimum lot | 6,000 sq ft. Statewide statute includes a small-lot pathway around 6,000 sq ft for many internal ADUs — confirm how South Ogden applies it on your zone. | 10,000 sq ft. Local minimum often cited at 10,000 sq ft — Already allows DADUs on ≥10,000 (more permissive than 11,000). Confirm permitted-use (vs any discretionary) status and parking caps. |
| Owner occupancy | Owner-occupied SF property | Not yet verified — confirm with the city |
| Parking | +1 off-street parking | Not yet verified — confirm with the city |
| Size limits | Not yet verified — confirm with the city | DADU not permitted on lots <10,000 sq ft |
| Height | Not yet verified — confirm with the city | Height generally ≤19' with limited increases if setbacks increase |
| Setbacks | Not yet verified — confirm with the city | Height generally ≤19' with limited increases if setbacks increase |
| Permit process | No min lot for internal/attached if zoning/permitting met | DADU not permitted on lots <10,000 sq ft |
State law: detached ADUs from October 1, 2026
South Ogden is a “specified municipality” under Utah S.B. 284. Beginning October 1, 2026, it must permit one detached ADU as a permitted use on a lot of 11,000 sq ft or more that has a detached single-family home. The city can still apply setbacks, height, design, owner-occupancy and limited parking rules, and it may allow detached ADUs on smaller lots. How the state ADU laws work.
How our property map screens South Ogden lots
The map colors parcels using the rules on this page and the recorded lot size. A color is a planning screen, not a permit; South Ogden makes the decision.
- The statewide map screen starts a new external ADU at about 11,000 sq ft. South Ogden's researched external minimum is 10,000 sq ft. Lots below that city minimum stay highly unlikely on the map even when they clear 11,000 sq ft.
- "Likely" above 15,000 sq ft is this site's planning band for a large recorded lot. It is not a sentence in the South Ogden code. Owner occupancy, parking, setbacks, zones, and HOA rules below still have to be checked.
Planned communities, PRDs and PUDs
Reviewed on September 22, 2026 against this city's research file, its published ADU page where one was found, and Utah meeting packets. No adopted sentence was confirmed that allows or bans an ADU in every PUD, PRD, PRUD, or planned community. If the assessor class or subdivision name says PUD, PRD, PRUD, planned unit development, planned residential development, planned community, resort community, or master planned community, the map keeps that lot highly unlikely regardless of size. A plat, CC&Rs, or development agreement can still prohibit an ADU where the zone allows one.
Planning notes for South Ogden
South Ogden’s housing report describes an internal-ADU pathway established in 2021. Use that as a starting point, then verify the current code rather than treating the report’s historical permit counts as today’s activity. We can help identify the zoning, building work and rental approvals relevant to your proposed conversion.
Bring these to your review
- Current zone and existing floor plan
- Proposed entrance, kitchen and parking
- Owner occupancy and rental intentions
The question to resolve first
Which current permits and operating approvals are needed for this internal conversion?
Sources
We link only to government sources and public meeting records. Codes change; confirm the current version with South Ogden before you apply.
- South Ogden housing report — accessory dwelling units
Historical city report documents the 2021 internal-ADU framework
- Utah S.B. 284 (2026), enrolled bill
Statewide detached-ADU requirements for specified municipalities, operative October 1, 2026.
- Official South Ogden website
Common South Ogden ADU questions
Can you build an ADU in South Ogden?
South Ogden: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 10,000+ sq ft). Owner occupancy applies. This is planning guidance, not a permit. Confirm the zone on your parcel with South Ogden.
What lot size does South Ogden require for an ADU?
Internal ADU: 6,000 sq ft minimum. Statewide statute includes a small-lot pathway around 6,000 sq ft for many internal ADUs — confirm how South Ogden applies it on your zone. Detached ADU: 10,000 sq ft minimum. Local minimum often cited at 10,000 sq ft — Already allows DADUs on ≥10,000 (more permissive than 11,000). Confirm permitted-use (vs any discretionary) status and parking caps.
Does South Ogden require the owner to live on the property?
Internal ADU: Owner-occupied SF property. Detached ADU: Not yet verified — confirm with the city.
How much parking does a South Ogden ADU need?
Internal ADU: +1 off-street parking. Detached ADU: Not yet verified — confirm with the city.
What does it cost to build an ADU in South Ogden?
Wasatch Front planning bands are often about $55,000–$145,000 for an internal suite, $70,000–$175,000 for a garage conversion, and $95,000–$250,000 or more for a new detached unit, before unusual site work. These are planning ranges, not bids.
Can an HOA block an ADU in South Ogden?
City approval does not override CC&Rs or plat notes. Read the HOA documents and your subdivision plat before you design. A private restriction can stop a unit the city would otherwise allow.
Before you design: general checks for any Utah ADU
General planning advice, not South Ogden code.
- Confirm the zoning district on the city zoning map. The county assessor’s “residential” class is not zoning.
- Read your HOA CC&Rs and subdivision plat notes; private restrictions can block a unit the city allows.
- Sketch existing and proposed parking. Driveway geometry and access often decide what fits.
- Ask early about sewer, water and electrical capacity; utilities can force a redesign.
- Expanding a building’s footprint usually triggers full setback and height rules.
Nearby city ADU rules
Want to know what fits on your South Ogden lot?
Free, no obligation. We review your parcel against these rules and, if you want, introduce independent design and construction partners. Partners may pay us for referrals.
Utah ADU Builder provides educational planning guidance. This page is not legal advice and not a permit. Population: UGRC POPLASTESTIMATE / Census-derived municipal estimates (manual fill where UGRC blank). Editorial standards.