Cache County · 5,766 residents
Hyde Park ADU rules
Hyde Park: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies.
Internal ADU (inside the home)
Detached ADU (backyard building)
✓ Checked against city sources on September 24, 2026 See sources
Hyde Park 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. ADUs are not allowed on lots smaller than 6,000 sq ft. | 6,000 sq ft. Detached ADUs are not allowed on lots smaller than 6,000 sq ft. |
| Owner occupancy | The owner must live on the property (except for bona fide temporary absences), sworn in a notarized application, and must record a restrictive covenant. | The owner must live on the property (except for bona fide temporary absences), sworn in a notarized application, and must record a restrictive covenant. The main home and ADU must have the same owner. |
| Parking | Three off-street spaces in total: two for the main home and one for the ADU; spaces in the front-setback driveway don't count. | Three off-street spaces in total: two for the main home and one for the ADU; spaces in the front-setback driveway don't count. |
| Size limits | No more than two bedrooms and no more than 1,000 sq ft; occupancy is limited to two people per bedroom plus one. | Up to 1,000 sq ft of living space and no larger than the main home; a stand-alone unit is single-story with up to 2 bedrooms, and it can be split over two stories only when built with an accessory building such as a shop or garage. |
| Height | Not yet verified — confirm with the city | 15 ft, or 30 ft when the ADU is above an accessory building such as a shop or garage. |
| Setbacks | Not yet verified — confirm with the city | Same setbacks as the main home, even when the ADU is part of an accessory building. |
| Zones | Permitted in the A, RC, R-2, R-4, R-5 and MR zones. Only one ADU (internal or detached) per lot. | Permitted in the A, RC, R-2, R-4, R-5 and MR zones. Only one ADU (internal or detached) per lot; not allowed in a mobile home. |
| Short-term rentals | ADUs may not be used or offered as short-term rentals. | ADUs may not be used or offered as short-term rentals. |
| Permit process | All ADUs must be licensed with the city: submit a notarized application, an inspection fee from the city's fee schedule, and a restrictive covenant (template provided by the city). The ADU needs its own entrance on the side or rear, its own address, and shares the main home's water meter; both units pay full monthly city utility charges. | All ADUs must be licensed with the city: submit a notarized application, an inspection fee from the city's fee schedule, and a restrictive covenant (template provided by the city), and get building permits before construction. The ADU shares the main home's water meter and sewer line; both units pay full monthly city utility charges. |
Proposed or pending changes
Not adopted as of September 24, 2026. They do not change the rules above until the city adopts them.
- Ordinance 2026-18 (ADU ordinance and definitions revisions): Planning Commission public hearing Sept 2, 2026 and City Council action item Sept 9, 2026. The outcome was not published as of Sept 24, 2026, and the online code still shows the last ADU amendment as Ord. 2026-04 (Feb 25, 2026).
State law: detached ADUs from October 1, 2026
Hyde Park 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 Hyde Park 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; Hyde Park makes the decision.
- The statewide map screen starts a new external ADU at about 11,000 sq ft. Hyde Park's researched external minimum is 6,000 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 Hyde Park 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.
Sources
We link only to government sources and public meeting records. Codes change; confirm the current version with Hyde Park before you apply.
- U.S. Census Bureau — Vintage 2024 population estimates, Utah incorporated places
July 1, 2024 population estimates for the city and Cache County (145,487).
- Utah Code 17-60-104 — Classification of counties
A county with 40,000 to 259,999 people is a county of the third class; Cache County (145,487) is third class.
- Utah Code 10-2-301 — Classification of municipalities
City class population thresholds.
- Utah S.B. 284 (2026) enrolled — Utah Code 10-21-304 detached ADUs
Specified municipalities must permit a detached ADU on lots of 11,000 sq ft or more with a single-family home, effective Oct 1, 2026; caps detached-ADU parking at 1 space (<650 sq ft) or 2 spaces (650+ sq ft).
- Hyde Park City — Planning
Planning forms (zoning clearance letter application), municipal code link, site development standards and land use fee schedule links.
- Hyde Park Planning Commission public hearing notice — Ordinance Amendment 2026-18 (ADU ordinance and definitions), Sept 2, 2026
Proposed amendment to the ADU ordinance and definitions in Title 12.
- Hyde Park City Council agenda — Sept 9, 2026
Action item 8f: Consider Ordinance 2026-18 - ADU Ordinance revisions.
- Official Hyde Park website
Common Hyde Park ADU questions
Can you build an ADU in Hyde Park?
Hyde Park: internal ADUs allowed (lot 6,000+ sq ft); detached ADUs allowed (lot 6,000+ sq ft). Owner occupancy applies. This is planning guidance, not a permit. Confirm the zone on your parcel with Hyde Park.
What lot size does Hyde Park require for an ADU?
Internal ADU: 6,000 sq ft minimum. ADUs are not allowed on lots smaller than 6,000 sq ft. Detached ADU: 6,000 sq ft minimum. Detached ADUs are not allowed on lots smaller than 6,000 sq ft.
Does Hyde Park require the owner to live on the property?
Internal ADU: The owner must live on the property (except for bona fide temporary absences), sworn in a notarized application, and must record a restrictive covenant. Detached ADU: The owner must live on the property (except for bona fide temporary absences), sworn in a notarized application, and must record a restrictive covenant. The main home and ADU must have the same owner.
How much parking does a Hyde Park ADU need?
Internal ADU: Three off-street spaces in total: two for the main home and one for the ADU; spaces in the front-setback driveway don't count. Detached ADU: Three off-street spaces in total: two for the main home and one for the ADU; spaces in the front-setback driveway don't count.
Can an ADU in Hyde Park be a short-term rental?
Internal ADU: ADUs may not be used or offered as short-term rentals. Detached ADU: ADUs may not be used or offered as short-term rentals.
What does it cost to build an ADU in Hyde Park?
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 Hyde Park?
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 Hyde Park 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 Hyde Park 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: U.S. Census Bureau population estimate (2024). Editorial standards.