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Communities, Retreats & Experiences / Nashville and Davidson County, Tennessee

Eastland DADU proposal: backyard homes are not a triplex or quadplex plan

A Nashville bill would add 12 detached accessory dwelling units to an existing Specific Plan. The proposal creates a different housing and income test from a duplex, triplex, or quadplex—and it still has a public hearing, final-plan work, and permits ahead.

Published 2026-11-04Checked 2026-11-04UPP Project Blog

The question in plain English

Metro Council is scheduled to hear BL2026-1594 on November 5. The bill would amend an existing Specific Plan covering about 2.78 acres west of McFerrin Avenue and north of West Eastland Avenue, inside the Greenwood Neighborhood Conservation Overlay. It would add permission for 12 detached accessory dwelling units, often called DADUs, to uses already approved. Does that mean the land can be valued as a 12-unit apartment project, a group of triplexes, or a group of quadplexes? No. A DADU is a small secondary home connected to a parcel with a principal single-family home. The bill sets a project menu and conditions; it does not erase the public hearing, final site plan, parcel, building, fire, utility, and permit work. This is a public planning case, not an Urban Planning Pros or private-client project.

The short answer

Treat the proposal as a reason to compare three different paths. First, document the existing Specific Plan and what can be built without this amendment. Second, test the amended plan with its principal homes, accessory homes, live-work units, commercial space, private drives, and final-plan conditions. Third, compare any separate triplex or quadplex idea only under zoning and a building form that actually permit it. Do not count 12 DADUs as 12 free-standing lots or 12 units that can be placed anywhere on the 2.78 acres. Metro's current DADU guidance generally allows one accessory home on a qualifying parcel only when one single-family principal structure is present. The legal arrangement, site fit, construction sequence, ownership, rent, and operating costs must all line up before the extra income belongs in the land value.

What the public record says

Metro's legislation record says the Planning Commission approved the amendment with conditions and disapproved it without those conditions on September 10. Council passed the bill on first reading October 6 and lists it for a November 5 public hearing. The bill would limit the whole Specific Plan to a maximum of 15 residential units, four live-work units, 12 DADUs, and 3,250 square feet of nonresidential space. It would prohibit both owner-occupied and non-owner-occupied short-term rental property across the development. A public-hearing listing is progress, not final passage. Even after a zoning action, the bill requires a corrected preliminary plan, final site-plan review, agency conditions, fire access and water supply, architectural elevations, private-drive labels, and possibly a final plat before permitting.

A DADU is not a duplex

Metro Codes describes a DADU as a small, single-unit home on property with an existing single-family residence and expressly says it is not the same as a duplex. The current eligibility page says the zoning must permit the use with conditions, the parcel must meet minimum lot-area rules, and the property must be in a qualifying service district, overlay, Urban Design Overlay, or Specific Plan. It also says only one DADU is permitted on a parcel and only when one single-family principal structure is present; two or more principal structures make a DADU ineligible. Those distinctions affect lending, title, insurance, utilities, construction, and management. An owner should not copy a duplex pro forma, divide the total acreage by a minimum lot size, or assume an accessory home can be sold as an independent lot.

Start with the principal-home plan

The clean base case is the principal housing already supported by the adopted Specific Plan, current parcel pattern, and recorded documents. Confirm each parcel, principal structure, existing approval, overlay, setback, access point, sewer easement, private drive, fire route, utility connection, stormwater feature, parking area, and shared obligation. Then price the principal homes without any unapproved accessory rent. This reveals whether the main project works on its own and which parcels could lawfully support a DADU after the amendment. It also protects the owner from using accessory income to hide a weak principal-home plan. If the site cannot carry the main homes, shared infrastructure, and final-plan conditions, adding small homes may increase cost and delay without creating durable value.

Test the 12 accessory homes one by one

A useful DADU test should pair each proposed accessory home with its principal home and parcel. Place both buildings, entries, parking, walkways, refuse, utilities, grading, drainage, fire access, construction access, and outdoor space on a current survey. Check footprint, height, separation, privacy, trees, easements, and the conservation overlay. Show which costs are private and which are shared through the homeowners association or another recorded agreement. The current bill says no parking may occur on the one-way private drive and requires that internal private drives be labeled and maintained by the homeowners association. It also requires adequate fire access and water supply before building permits. A plan that reaches 12 on paper but cannot solve these conditions is not a 12-home feasibility result.

Triplex and quadplex options need a different route

A triplex puts three principal homes in one building; a quadplex puts four. Neither is created by adding a DADU use to a plan. If an owner wants to compare those forms, Metro should first confirm the zoning, building type, parcel, density, parking, fire, utility, stormwater, and final-plan path that would apply. The current bill limits uses to the Specific Plan's stated menu and says a Council ordinance is required for changes that increase density, add uses, remove conditions, or add access points. That makes a triplex or quadplex a separate scenario, not a substitute label for several accessory homes. Compare the real DADU plan with a separately verified plex plan; do not blend the best unit count from one with the simpler rules or costs of the other.

Compare selling with finishing the approval work

A sale before final Council action transfers the hearing, plan correction, engineering, permit, construction, and operating risk to the buyer. A sale after zoning but before final site-plan approval may narrow one risk while leaving access, fire, utilities, drainage, platting, architecture, and construction unresolved. A later sale after final approvals may support a clearer price, but the owner carries professional fees, taxes, insurance, interest, coordination time, and the possibility of redesign. Put all three sale dates on one page. Use the same land value, survey, known infrastructure, and market assumptions. Measure any increase in net sale proceeds against every dollar and month needed to reach that point instead of treating the proposed 12 DADUs as immediate value.

Compare sales with long-term cash flow

For a build-and-sell plan, estimate the principal and accessory homes separately, then add shared site work, design, permits, financing, marketing, commissions, closeout, warranty, and carrying time. For a hold plan, start with long-term rent because the bill would prohibit short-term rentals. Deduct vacancy, management, maintenance, turnover, utilities paid by the owner, taxes, insurance, homeowners association costs, reserves, and debt service. Test slower lease-up, lower rent, higher construction cost, and a repair reserve for two homes on one parcel. Several small homes may spread vacancy risk and serve households that need smaller spaces. They also create more roofs, kitchens, meters, tenants, and shared rules. Cash flow is the money left after those obligations, not the total of the advertised rents.

Current demand supports a careful test

The Census Bureau estimates Davidson County at 745,904 residents on July 1, 2025, with 389,379 housing units, 5,632 building permits during 2025, a 52.8% owner-occupied rate, a median owner-occupied value of $417,400, and median gross rent of $1,582. FRED's September 2026 table of Realtor.com estimates shows 12,150 active Nashville-area listings compared with 10,846 a year earlier, median market time of 62 days compared with 59, and 4,606 price reductions compared with 4,234. The larger inventory supports conservative sale timing and rent testing. These county and metro figures do not prove demand, price, rent, construction cost, financing, absorption, or profit for the Eastland-area plan or any other property.

What the anonymous site signal says

Urban Planning Pros reviewed 2,363 anonymous content events from October 6 through November 4: 2,359 page views, two service clicks, and two Review My Property clicks. The home page had 130 views, request-a-quote 84, booking 74, the Nashville growth-map guide 39, services 37, insights 36, and fractional feasibility 34. Property-review, feasibility, highest-and-best-use, owner-side strategy, and several sell-versus-hold guides continued to receive views. Every city field was empty, so the activity supports a plain-English housing-choice and feasibility guide but not an Eastland-specific demand claim. No live Similarweb connection was available, so no Similarweb value was used, estimated, or invented.

The neighborhood test is part of the math

Accessory homes can create smaller long-term rentals without replacing every principal home. They can also add parking, service, privacy, drainage, and management pressure when placed carelessly. Review the relationship between each principal and accessory home, nearby houses, private drives, refuse collection, trees, light, noise, stormwater, and emergency access. The conservation overlay and required architectural elevations make fit especially important here. A durable plan should give residents safe paths, usable outdoor space, clear addresses, reliable utilities, and written responsibility for shared areas. Those items protect the neighborhood and the owner's operating result. A unit that creates repeated access, parking, or maintenance conflict is not an efficient income unit even when gross rent looks attractive.

What to verify before choosing the plan

Collect the current Specific Plan ordinances, November 5 Council record, corrected preliminary plan, survey, deeds, plats, easements, overlay rules, title exceptions, utility records, fire comments, drainage information, private-drive agreements, and homeowners association documents. Confirm final passage, the permitted principal and accessory homes, parcel pairing, short-term-rental prohibition, parking, access, utilities, fire flow, stormwater, final plat, final site plan, building code, permit order, and construction sequence. Then compare the existing plan, the amended DADU plan, selling at different approval stages, building principal homes for sale, and holding lawful homes for long-term cash flow. Urban Planning Pros can organize the approvals, responsibilities, schedule, and financial choices through Owner-Side Project Strategy. Use Review My Property below to start with the actual land. Information was checked November 4, 2026.

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