Building an ADU in Sacramento by Neighborhood: Natomas, the Pocket, Historic Districts and Alley Lots (2026)

The rules for building an ADU in the City of Sacramento are written once for the whole city: the same size limits, the same fee schedule and the same 60-day review clock apply in Natomas, the Pocket, Oak Park and East Sacramento. What changes from one neighborhood to the next is everything around those rules. A lot in North Natomas sits in a FEMA flood zone that the Pocket does not. A lot inside one of the City's 31 historic districts follows extra design standards. A lot on an unnamed alley may need a street sign before the ADU can get an address. And the school district that sends you a fee depends on which side of a district boundary your house is on.

This guide walks through those differences for homeowners inside City of Sacramento limits. It is based on the City's ADU Resource Center, the City Code, City fee forms and state law, with links to each source. If your address is in unincorporated Sacramento County (Carmichael, Fair Oaks, Arden-Arcade and similar areas), a different set of county rules applies.

What stays the same in every Sacramento neighborhood

Before looking at neighborhoods, it helps to know the citywide baseline, because most of it does not change with your ZIP code.

• Two ways to build. Under City Code 17.228.105 you choose either the City's local ADU standards or the state's streamlined option under Government Code 66323. The two cannot be combined.
• Size. On the local track one detached ADU can be up to 1,200 sq ft, and if you build two detached ADUs their combined floor area also cannot exceed 1,200 sq ft. The state track allows a detached ADU of up to 800 sq ft and 18 feet in height (20 feet when needed to match the roof pitch of the main house).
• Setbacks. On the local track, within 60 feet of the front property line the side and rear setbacks are 3 feet or the zone's requirement, whichever is less; beyond 60 feet a single-story ADU needs no side or rear setback. The state track uses 4-foot side and rear setbacks. Our ADU setback guide covers the details.
• Review. State law requires ADU permits to be approved ministerially, without a hearing, and decided within 60 days of a complete application when there is an existing home on the lot (Government Code 66317). The steps are in our Sacramento ADU permit guide.
• Parking. Sacramento's 2040 General Plan, adopted in February 2024, ended minimum off-street parking requirements for all properties in the city (City parking revisions).
• Impact fees. State law bars impact fees on an ADU with 750 sq ft of interior livable space or less (Government Code 66311.5). On the City's July 2026 fee estimate (form CDD-0419), the park, flood control and transportation impact fees are zero at 749 sq ft and add up to about $5,350 at 750 sq ft.

With that baseline in place, here is what changes by neighborhood.

Building an ADU in Natomas: the A99 flood zone

North and South Natomas sit in the Natomas Basin, surrounded by 42 miles of levees. After the U.S. Army Corps of Engineers re-evaluated those levees, FEMA mapped the basin into an AE flood zone in December 2008. According to the City's Natomas floodplain page, the AE designation would have required structures to be elevated up to 20 feet in some areas, which amounted to a de facto building moratorium. Since June 16, 2015, Natomas has carried an A99 designation instead. A99 is still a high-risk flood zone, but it allows construction with local conditions.

In practice, the conditions mean your ADU may need to sit higher off the ground. Since July 1, 2024, the City's flood zone construction requirements say that new residential construction in the A99 zone must:

• have its lowest floor at least one foot above the highest adjacent 100-year level of the City's drainage system, and at least 18 inches above the controlling overland release point in the street;
• provide an Elevation Certificate signed by a registered engineer, surveyor or architect;
• sign a hold harmless agreement with the City.

The City's page speaks of "new construction" and does not mention ADUs by name. Before you design a detached ADU in Natomas, email the City's flood information team (floodinfo@cityofsacramento.org) and ask how these requirements apply to your unit. If they do, the floor height affects the foundation design, the number of steps at the entry and the cost, so it is a question for the first design meeting, not the plan check.

Two more Natomas points. The City notes that owners with a federally backed mortgage still need flood insurance, because the levee improvements are not complete. The levee upgrades are still under way, and SAFCA, the local flood agency, has not published a finish date, so plan on the current rules rather than waiting for the map to change. Natomas is also served by Natomas Unified for school fees, at $5.17 per sq ft on the City's July 2026 school fee form (CDD-0226).

The Pocket, Greenhaven and Little Pocket: levees, not elevation

The Pocket and Greenhaven sit along the Sacramento River, protected by the Lower Sacramento River East Levee, which SAFCA says protects essentially all of the City south of the American River and west of Highway 99. On the effective FEMA flood map (read through Sacramento County's GIS layer), sample points in the Pocket and Greenhaven are shaded Zone X, "area with reduced flood risk due to levee." The City's flood requirements chart lists no elevation requirement for Zone X.

The levee itself is the constraint here. City Code 17.228.105 says an ADU may not project into the required setback from the landside toe of a levee, and the City's flood page advises homeowners building near a levee to check encroachment rules with the Central Valley Flood Protection Board. If your backyard runs toward the levee, measure from the toe before choosing a footprint.

Little Pocket, closer to downtown, is mostly Zone X as well, but flood zones are mapped parcel by parcel and areas close to the river can differ. Look up your own address on FEMA's flood map or the City's Land Information Lookup before assuming either way. Pocket and Greenhaven lots between Franklin and Riverside fall in Sacramento City Unified, which charges $5.38 per sq ft on the City's school fee form.

Historic districts: Boulevard Park, Poverty Ridge, Newton Booth and others

The City has 31 historic districts, most of them in the urban core. The list on the Sacramento Register includes Boulevard Park, Poverty Ridge, Newton Booth, South Side, Marshall Park, Winn Park, Capital Avenue, Bungalow Row, the Alkali Flat districts, an Oak Park district and a Sacramento City College district, among others. Being an older neighborhood is not the same as being a district: Land Park, Curtis Park, East Sacramento and the Pocket are not on the district list, although individual landmark properties can exist anywhere. The ADU Resource Center points homeowners to the City's Land Information Lookup to check a specific parcel.

ADUs are allowed in historic districts and on landmark properties. A detached ADU must meet the City's ADU Design Standards for Historic Properties, and when it does, it is reviewed through the building permit with no hearing. A few of those standards shape the site plan from the start:

• A detached ADU must sit entirely behind the rear facade of the main house, unless the rear yard lacks a clear 20 by 40 foot area.
• On lots deeper than 100 feet, the ADU needs at least 30 feet of separation from the historic building on the same parcel; on lots 100 feet deep or less, at least 4 feet.
• On lots with alley frontage, the ADU must be built no more than 5 feet from the alley line and face the alley with at least two operable windows and a ground-level door. New uncovered parking along the alley is not allowed.

An attached ADU, or any change to the historic house itself, goes through discretionary review instead. If a design cannot meet an objective standard, the City's process is Site Plan and Design Review, which takes longer and needs Planning approval. State law also removes parking requirements for an ADU in a historic district (Government Code 66322), and a garage demolition there may require public notice that is otherwise waived.

Alley lots in the central city and older neighborhoods

Many lots in the central grid and in older neighborhoods back onto an alley, and that changes two things. First, the address: every ADU needs a new address, which the Resource Center says can take up to four weeks. Addresses are assigned by the unit's primary access, so an ADU that opens onto the alley is addressed from the alley. According to the City's address request form (CDD-0104), an ADU fronting an unnamed alley will in most cases have to go through the alley naming process, and the applicant is responsible for the encroachment permit and for making and installing the street sign. Submitting the address request late can delay the building permit, so it belongs at the start of the project.

Second, the layout: an alley often makes a rear ADU easier to reach for construction and gives a tenant a separate entrance. City Code also relaxes the height limit for decks, balconies and landings near a rear or side line that abuts an alley.

Florin, Fruitridge, Meadowview and South Sacramento: check your sewer and school district

In the southern half of the city the differences are less visible but show up on the bill. The City has two sewer providers, the City of Sacramento and the Sacramento Area Sewer District, now SacSewer (Resource Center, step 3). Which one serves your street matters because each has its own connection rules and fees. A 2015 City planning report put parts of South and Southeast Sacramento (for example Valley Hi, Woodbine and Brentwood) with the sewer district and the Pocket, Meadowview and South Land Park on the City's system. Boundaries may have moved since, so confirm by address. Whichever provider serves you, state law says an ADU is not a new residential use for connection fees unless it is built together with a new house, and any fee for a new detached ADU's separate connection must be proportionate to its size or plumbing fixtures (Government Code 66311.5).

School fees are the other variable. ADUs under 500 sq ft pay none. Larger ADUs pay the district's rate on their whole area, and the City's July 2026 form lists very different rates by district:

• Sacramento City Unified (downtown, Pocket and Greenhaven, Meadowview, southeast to Power Inn Road and Elder Creek): $5.38 per sq ft
• Elk Grove Unified (south of Elder Creek, between Highway 99 and Elk Grove-Florin Road): $7.23 per sq ft
• Natomas Unified and Twin Rivers Unified: $5.17 per sq ft
• San Juan Unified (Campus Commons, east of 65th Street between Fair Oaks and Folsom Boulevard): $3.79 per sq ft

For a 740 sq ft ADU that is about $3,980 in Sacramento City Unified and about $5,350 in Elk Grove Unified. The district calculates the fee and the City asks for the receipt before issuing the permit. The rest of the fee picture is in our Sacramento ADU fees and permits guide.

A quick neighborhood checklist

1. Look up the parcel on the City's Land Information Lookup: zoning, historic district or landmark status.
2. Check the flood zone on FEMA's map. A99 (Natomas) means asking the City about elevation; Zone X near a levee means measuring the levee setback.
3. Find your sewer provider and school district before budgeting, since both change by address.
4. Check the alley: named or unnamed, and whether the ADU will be addressed from it.
5. Pick the track: the City's local standards (up to 1,200 sq ft, zone height) or the state option (up to 800 sq ft, 18 feet).
6. Size around the fee lines: 500 sq ft for school fees and 750 sq ft for impact fees. Our ADU floor plans show where each model falls.

Frequently asked questions

Can I build an ADU in Natomas?

Yes. The A99 designation since 2015 allows construction with local conditions. Since July 1, 2024, new residential construction there must meet elevation, Elevation Certificate and hold harmless requirements; ask the City's flood line how they apply to an ADU on your lot.

Is Land Park a historic district?

No. Land Park is not on the City's list of 31 historic districts. Individual properties anywhere can still be designated landmarks, so check your parcel on the City's Land Information Lookup.

Does a historic district mean a public hearing for my ADU?

Not for a detached ADU that meets the City's ADU Design Standards for Historic Properties: it is reviewed through the building permit. Attached ADUs and changes to the historic house go through discretionary review.

Do I need parking for an ADU in Sacramento?

No. The City ended minimum off-street parking requirements in the 2040 General Plan, and state law separately removes parking requirements near transit and in historic districts.

Every lot in Sacramento has its own mix of flood zone, district, alley and utilities. If you send us your address, we will check which of these apply to your parcel and suggest an ADU size and plan that fits it. Call (916) 238-8240 or request a free estimate. You can also start with our ADU construction services or see ADU building in Sacramento.

Sources: City of Sacramento ADU Resource Center (steps 1, 3 and 5); City Code 17.228.105; City of Sacramento Natomas floodplain page and flood zone construction requirements (2024 chart); SAFCA Natomas Basin and Sacramento River East Levee project pages; Sacramento Register historic districts list; City ADU Design Standards for Historic Properties; City forms CDD-0419 (rev. 07-12-2026), CDD-0226 (rev. 07-28-2026) and CDD-0104 (rev. 07-12-2026); City parking revisions page; City 2035 General Plan Background Report, Utilities (2015); FEMA flood map via Sacramento County GIS; California Government Code 66311.5, 66317, 66322 and 66323. Checked November 2026. This article is general information, not legal advice; confirm requirements for your parcel with the City before you design.