A backyard cottage for a parent, an adult child, a caregiver, or a long-term renter used to depend on which side of a city line you lived on. Starting July 1, 2027, Virginia law changes that conversation for most single-family neighborhoods.
The General Assembly passed Senate Bill 531 in 2026, and it was signed on April 13, 2026, as Chapter 895 of the Acts of Assembly. It creates a statewide rule for accessory dwelling units, often called ADUs. Below is a plain-English look at what the law says, what your city or county can still require, and how to start planning if you own land in Suffolk, Chesapeake, Virginia Beach, Isle of Wight County, Smithfield, or anywhere else in Hampton Roads.
This article is general education, not legal advice. Always confirm the current rules with your locality before you design or buy.
What Counts as an ADU Under Virginia Law
The new section of the Code of Virginia, Section 15.2-2292.4, defines an ADU as an attached or detached dwelling unit on a residential lot that provides complete independent living facilities, sits on the same lot as an existing or proposed main home, and includes space for living, sleeping, eating, cooking, and sanitation.
In practice, that covers a detached backyard cottage, an apartment over a detached garage, or an attached suite with its own kitchen and bath. A bonus room without a kitchen is not an ADU under this definition.
What Changes on July 1, 2027
The core of the law is short. Zoning ordinances for single-family residential districts are treated as including ADUs as a permitted accessory use. A locality may not pile on extra requirements beyond what the statute lists.
Anyone proposing an ADU must first get an ADU permit. The locality can charge up to $500.00 for that permit, and that fee is in addition to normal building, site, and inspection fees. The locality must issue the permit when the applicant shows the ADU meets the statute and the local codes it references.
The law also lists things a locality cannot require. It cannot demand larger side or rear setbacks for the ADU than for the main house or for accessory structures, whichever is less. It cannot make ADU rules on height, setbacks, lot size, coverage, or frontage stricter than those for single-family homes in the same zone. It cannot require a restrictive covenant, require public street improvements beyond repairing damage from construction, or require that the people living in the ADU be related to the people in the main house.
What Your City or County Can Still Require
The statute gives localities a specific list of rules they may adopt. These are the items most likely to shape your design and budget:
1. A minimum lease term of 30 consecutive days or longer if you rent the ADU, which limits short-term rentals.
2. Replacement of any required parking the ADU removes, and dedicated parking for the ADU.
3. Limits on floor area, lot coverage, and impervious area, as long as the limit is no lower than 500 square feet on lots of 2,500 square feet or more (350 square feet on smaller lots).
4. Compliance with the Uniform Statewide Building Code, plus water, sewer, septic, emergency access, flood zone, and stormwater rules.
5. Historic district, architectural district, and corridor protection rules.
6. Air Installations Compatible Use Zone (AICUZ) restrictions, which matter in parts of Virginia Beach and Chesapeake near Naval Air Station Oceana and Naval Auxiliary Landing Field Fentress.
7. Owner occupancy of either the main home or the ADU at the time you apply.
8. A maximum distance of 500 feet between the ADU and the main home.
9. No ADU on a lot that already has more than one dwelling unit, and no selling or subdividing the ADU separately.
Three Exceptions Hampton Roads Owners Should Not Miss
First, the law does not override private agreements. HOA declarations, recorded covenants, condominium instruments, and property owners' association rules still control. Many Hampton Roads subdivisions have covenants that limit outbuildings or second dwellings, so read your HOA documents before you sketch anything.
Second, the law does not apply to a locality that adopted its own ADU ordinance before January 1, 2026. Some Virginia localities already had ADU or accessory apartment rules on the books. If yours did, its existing ordinance may continue to govern instead of the new state framework. Call your local planning or zoning office and ask directly.
Third, ADU permits already approved before July 1, 2027, are not affected, and localities may pass their own compliant ordinances before the deadline. Expect some Hampton Roads cities and counties to update their codes during 2026 and 2027.
Local Factors That Will Shape Your ADU
Even with a statewide rule, the land decides what is practical. On a sewered lot in North Suffolk or Chesapeake, the questions are usually setbacks, parking, stormwater, and utility connections. On rural land in Isle of Wight County, southern Suffolk, or Pungo, the big question is septic. A system sized for the main house may not handle a second kitchen and bath, and the Virginia Department of Health oversees onsite sewage permits.
Flood zones matter across the region. If part of your lot sits in a FEMA special flood hazard area, the ADU will need to meet the same floodplain rules as any new dwelling. Near the water, Chesapeake Bay Preservation Act buffers can also limit where a new structure can go.
How to Start Planning Now
July 2027 is closer than it sounds once you count design, surveys, permitting, and construction. If an ADU is on your list, a few early steps will save time:
1. Pull your plat, survey, and any HOA documents and look for covenants on accessory structures.
2. Ask your locality whether it adopted an ADU ordinance before January 1, 2026, and whether it plans changes before July 1, 2027.
3. Check your flood zone and, on rural land, your septic permit and system size.
4. Think about who will use the space and for how long, because that drives size, accessibility, and layout.
5. Get a builder's eyes on the site before you commit to a plan.
Custom Homes of Virginia has spent more than 20 years building on lots across Hampton Roads, Suffolk, Smithfield, and Isle of Wight County, including the site work, septic, and permitting questions that come with them. If you are considering a backyard cottage or attached suite, contact our team to talk through your lot and your timing.
