Cities | Dallas
Dallas Duplex, ADU and Multiplex Rules 2026
On a Dallas lot zoned for single-family homes, the Development Code allows one dwelling unit. A second unit needs an ADU overlay for the neighborhood or a Board of Adjustment special exception for your property. The City's 2024 land use plan, ForwardDallas 2.0, guides future zoning cases. In 2025 the City cut its parking minimums, and two state laws changed the rules for commercial land and zoning protests. This page sets out each rule with its date and source.
Dallas in six facts
- The City of Dallas says accessory dwelling units (ADUs) "are not allowed to be built by right in most cases." Source: City of Dallas ADU page
- Since June 27, 2018 Dallas has two routes to a second unit: an ADU overlay requested by a petition of more than 50 percent of owners in the area, or a Board of Adjustment special exception for one property. Source: City of Dallas ADU page
- For a special exception, the Board of Adjustment must find the extra unit will not be used as rental accommodations, and must require a deed restriction against renting it. Source: Board of Adjustment minutes, March 20, 2024
- ForwardDallas 2.0 was adopted September 25, 2024 and amended March 25, 2026. The City says it "does not allow multiplexes on any single-family zoned property." Source: City of Dallas, ForwardDallas 2.0
- Parking reform adopted May 14, 2025 requires 1 space per unit for single-family and duplex homes in R, D and TH districts, none elsewhere, and none for multifamily buildings of 20 units or fewer. Source: City of Dallas parking amendment
- Dallas permitted 36 two-unit buildings and 4 buildings of three or four units in 2025, against 2,026 one-unit buildings. Source: Census Building Permits Survey
State Law in Dallas, in Brief
Dallas had 1,304,379 people in the 2020 Census, and Dallas County had 2,613,539. That places Dallas among the 19 cities the 2025 laws reach, by VanPlex count from 2020 Census figures. SB 15 caps the lot size Dallas can require on a new single-family tract of five acres or more with no recorded plat at 3,000 square feet. SB 840 requires Dallas to allow housing of three or more units on land zoned for office, commercial, retail, warehouse or mixed use, with no rezoning. HB 24 changed the protest rules for any rezoning that adds housing. Texas has no statewide ADU law: SB 673 (2025) stopped on the House calendar on May 26, 2025. So the number of homes on a Dallas single-family lot comes from the Dallas Development Code.
One Home per Single-Family Lot
The Dallas Development Code is Chapter 51A of the City code. Its single-family use rule, Sec. 51A-4.209(b)(6)(E), is quoted in the Board of Adjustment Panel B minutes of March 20, 2024: "The single-family use regulations of the Dallas Development Code state that only one dwelling unit may be located on a lot and that the Board of Adjustment may grant a special exception to this provision and authorize an additional dwelling unit on a lot when, in the opinion of the board, the special exception will not: (1) be use as rental accommodations; or (2) adversely affect neighboring properties."
When the board grants that exception, the minutes continue, "the board shall require the applicant to deed restrict the subject property to prevent the use of the additional dwelling unit as rental accommodations." A deed restriction is a rule recorded against the property that binds later owners too. Under this route the recorded restriction bars renting the extra unit.
The City's ADU page sums up the situation in one line: "ADUs are not allowed to be built by right in most cases." "By right" means approved by staff against written rules, with no hearing or vote.
Two Routes to a Second Unit
On June 27, 2018, the Dallas City Council approved two options "that would allow Accessory Dwelling Units (ADUs) to be built and/or rented," in the words of the City's ADU page. An overlay is an extra set of zoning rules placed on a mapped area on top of its base zone. A special exception is permission the Board of Adjustment grants to one property.
| Route | Who applies | Approval steps | Renting the unit |
|---|---|---|---|
| ADU overlay | A neighborhood. A petition signed by more than 50 percent of owners in the area, and a committee of at least 10 owners | City Plan Commission hearing, then City Council hearing | The City says the 2018 options allow ADUs "to be built and/or rented" |
| Board of Adjustment special exception | One property owner | Board of Adjustment hearing and decision | The code text quoted in Board minutes bars use as rental accommodations and requires a deed restriction against renting |
Sources: City of Dallas ADU page and Board of Adjustment minutes, March 20, 2024.
The two sources say different things about rent. The 2018 City page describes options for ADUs "to be built and/or rented," and the code text quoted in the 2024 minutes ties the single-property special exception to a no-rental deed restriction. If renting the unit is part of your plan, ask the Board of Adjustment staff which rule applies to your case before you file.
For the overlay, the City's ADU page says petitions "must be signed by more than 50% of the property owners within the area of request," and a committee of at least 10 owners must form. The request then needs public hearings at the City Plan Commission and the City Council. An overlay is a zoning change that allows more housing, so the protest rules in HB 24 apply to it (see the protest section below).
Why There Is No Citywide ADU Rule
Dallas did draft one. The City's code amendments list shows "Accessory Dwelling Units (DCA 0156-006) Indefinitely Postponed on October 1, 2020." DCA stands for Development Code Amendment. As of October 2026, the City's ADU page lists the two 2018 routes.
ForwardDallas 2.0: The City's Land Use Plan
ForwardDallas 2.0 updates the City's 2006 comprehensive land use plan. A comprehensive plan is the City's long-range guide for where homes, shops and jobs should go; the zoning code is the law that applies to each lot today. The Council adopted the plan on September 25, 2024 as Ordinance No. 32885, and amended it with Ordinance No. 33366 at its March 25, 2026 meeting. The ordinance describes that amendment as "complying with federal directives."
The ForwardDallas page answers the multiplex question directly: "No, ForwardDallas 2.0 does not allow multiplexes on any single-family zoned property in Dallas." It adds that the City Plan Commission "voted to classify multiplex use as a secondary use in the Community Residential and Small Town Residential Placetypes." A placetype is a category of land in the plan, such as an area of houses. A secondary use is one the plan accepts in that category in smaller amounts than the main use. Any actual change on a lot would need a zoning case through City staff, the City Plan Commission and the Council.
Parking Reform of May 14, 2025
The City's parking amendment page says: "On May 14, 2025, Dallas City Council voted 14-1 to adopt Parking Reform." The amendment is DCA 190-002. Its rules for homes:
| Where or what | Minimum parking |
|---|---|
| Any use within half a mile of a light rail or streetcar station | No minimum |
| Any use in downtown CA-1 and CA-2 districts | No minimum |
| Single-family and duplex homes in R, D and TH districts | At least 1 space per unit |
| Single-family and duplex homes in other districts | No minimum |
| Multifamily building of 0 to 20 units | No minimum |
| Multifamily building of 21 to 199 units | Half a space per unit |
R, D and TH are district names in the Dallas Development Code. On a lot in one of them, a duplex needs at least two spaces, one per unit. The row for multifamily buildings of 0 to 20 units sets no minimum; ask the City whether it treats your triplex or fourplex as multifamily. Read the lot size and setback rules for the D and TH districts in Chapter 51A on the City's code site before you design; this page does not give them because VanPlex could not open that code text to check.
SB 840 on Dallas Commercial Land
Under Local Government Code chapter 218, added by SB 840, Dallas must allow multifamily housing, defined as three or more units on a site, on land zoned for office, commercial, retail, warehouse or mixed use. It may not require a rezoning, variance or council vote first. It may not cap density below 36 units per acre or the City's highest residential density, cap height below 45 feet or the commercial height on the site, or require more than one parking space per unit. Heavy industrial zones, land within 1,000 feet of heavy industry, and land within 3,000 feet of an airport or military base are left out.
So City staff approve a fourplex on a qualifying commercial lot in Dallas when it meets the written rules. The City's own 2025 parking rule sets no minimum for a building of 0 to 20 units, below SB 840's ceiling of one space per unit. The SB 840 page has the full rules.
Neighbor Protests After HB 24
An ADU overlay or any other rezoning that allows more housing follows the protest rules HB 24 wrote into Local Government Code 211.0061 for proposals made on or after September 1, 2025. Neighbors' protest counts as valid only if owners of at least 60 percent of the land within 200 feet of the change sign it. After a valid protest of that kind, a majority of all Council members can approve the change. Owners of 20 percent of the land inside the change area can still file a protest that needs a three-fourths vote. Protest rights do not apply to a citywide new zoning code or map, which matters for the code rewrite below.
The Development Code Rewrite
The City's code amendments page says: "The City of Dallas is undergoing a complete rewrite of Chapter 51A, Dallas Development Code." The project is called Dallas Zoning Reform, and topic-by-topic amendments are being merged into it. VanPlex found no adoption date. The Zoning Ordinance Advisory Committee meetings listed for June to November 2026 show as cancelled. Check that page for an adoption date if you own land in Dallas.
What the Numbers Show
Dallas had 1,329,491 people on July 1, 2025, by the Census Bureau's Vintage 2025 estimate, down from 1,331,299 a year earlier. The city spans Dallas, Collin, Denton, Kaufman and Rockwall counties.
| Dallas, 2025 permits | Buildings (homes) |
|---|---|
| 1-unit buildings | 2,026 |
| 2-unit buildings | 36 (72) |
| 3 to 4 unit buildings | 4 (12) |
| 5+ unit buildings | 346 (4,883) |
Source: Census Bureau Building Permits Survey, South Region places, 2025 annual. Population from the Vintage 2025 city file.
In 2025 Dallas permitted 36 two-unit buildings. Houston permitted 1,054. Dallas permitted 346 buildings of five or more units, the most of any city in this guide's permit table.
Permits, Codes and Fees
State law sets the permit clock. Under Local Government Code 214.904, a Texas city has 45 days to grant or deny a permit application, give written reasons it cannot yet decide, or agree on a deadline; if it misses the deadline it may not collect, and must refund, the permit fees. A duplex follows the residential building code, and under Occupations Code 1301.551 no Texas city may require fire sprinklers in a one- or two-family dwelling. VanPlex did not verify Dallas's adopted fee schedule, so this page gives no fee amounts; ask the City for the current schedule.
Deed restrictions apply in Dallas too. Property Code 202.003 tells courts to read a restrictive covenant broadly to carry out its purpose. Read the restrictions recorded on your lot before you apply for an overlay or an exception.
Best For
- ✓ Commercial, office, retail or warehouse land, where SB 840 allows three or more homes with no rezoning.
- ✓ A neighborhood where more than half of the owners want an ADU overlay.
- ✓ A second unit for family use, through a Board of Adjustment special exception.
Usually Fails When
- ✕ The plan assumes a second unit on a single-family lot by right.
- ✕ The plan depends on rent from a unit approved by special exception with a no-rental deed restriction.
- ✕ Recorded deed restrictions limit the lot to one home.
What To Verify Before Spending Money
- → Which rental rule applies to your route, confirmed with Board of Adjustment staff.
- → The D or TH district lot size and setbacks in Chapter 51A.
- → Whether the Development Code rewrite has been adopted.
Where to Go Next
Related on VanPlex: the SB 840 commercial land page, the HB 24 protest page and the Texas multiplex guide overview.
Frequently Asked Questions
Can I build an ADU in Dallas?
Can I rent out an ADU in Dallas?
Did ForwardDallas 2.0 allow multiplexes in Dallas single-family areas?
Does Dallas require parking for new homes?
Is Dallas rewriting its zoning code?
How do I get an ADU overlay for my Dallas neighborhood?
Does SB 840 apply in Dallas?
How many duplexes were permitted in Dallas in 2025?
When was ForwardDallas 2.0 adopted?
Did Dallas ever try to allow ADUs citywide?
Can neighbors stop an ADU overlay rezoning in Dallas?
Official sources (checked October 2026)
Planning a multiplex in Texas?
VanPlex builds multiplexes and models lots in British Columbia, Canada. We do not build, lend, or broker in Texas yet. Join the Texas list and we will tell you when that changes.