Last researched: September 18, 2026. Trappe is a separate zoning jurisdiction from Talbot County. The Town adopted a new zoning ordinance in 2025, runs its own Planning Commission and permit system, requires rental licensing, and operates municipal water/sewer infrastructure. Its published 2026 ordinance index reviewed for this guide does not show a separately identified final HB 1466/ADU ordinance through September 18.
Homeowner takeaway: If your property is inside Trappe, do not apply Talbot County’s ADU size or detached-lot rules. Ask Trappe which provisions of its 2025 zoning ordinance currently authorize an ADU on your parcel and whether an HB 1466 implementation amendment has been adopted or is pending. Maryland’s local-law deadline is October 1, 2026.
Trappe ADU planning snapshot
| Question | Verified planning point |
|---|---|
| Zoning authority | Town of Trappe inside municipal limits—not Talbot County zoning. |
| Current zoning code | Ordinance 3-2025 is listed by the Town as the Zoning Ordinance. |
| 2026 ADU implementation | The public 2026 ordinance index reviewed through Sept. 18 lists Ordinance 1-2026 (budget); we did not verify a separately listed final HB 1466/ADU ordinance there. |
| Building permit | Trappe publishes its own permit process; new residential construction requires inspection and a certificate of occupancy. |
| Fire sprinklers | Town permit page says required for all new residential and commercial construction; confirm application to your ADU type. |
| Long-term rental | A Town Residential Rental License is required before renting a unit. |
| Short-term rental | Separate application and Ordinance 5-2023; ADU approval does not automatically authorize Airbnb/VRBO use. |
| Utilities | Trappe operates water/sewer services; capacity and connection requirements should be checked early. |
1. Is the property actually inside Trappe?
A Trappe mailing address is not enough. For an in-Town parcel, start with Trappe’s Planning Commission and current zoning ordinance. If outside Town limits, use our Talbot County ADU Rules guide. If unsure, use the Maryland ADU Jurisdiction Finder.
2. Trappe rewrote its zoning ordinance in 2025
The official ordinance archive lists Ordinance 3-2025 — Zoning Ordinance, and the Planning Commission page links the zoning ordinance and zoning map. Older online references may therefore be stale. Give Town staff the property address and ask for the zoning district, the provision authorizing the ADU, approval type, and dimensional standards for your proposed configuration.
3. Maryland’s October 1, 2026 deadline is close
HB 1466 requires covered local governments to adopt a local law authorizing ADUs on land with an existing single-family detached dwelling by October 1, 2026. Maryland Planning says compliant local laws must authorize ADUs consistent with the state definition, exclude ADUs from density calculations, and may not impose a size maximum below the state’s 75% threshold.
As of our September 18 review, Trappe’s official 2026 ordinance index lists Ordinance 1-2026 for the FY 2026-27 budget; we did not verify a separately listed final ADU/HB 1466 ordinance there. That is not proof that no implementation work exists. Ask the Town directly rather than treating an ordinance-index search as a legal conclusion.
4. Do not borrow Talbot County’s size rules
Talbot County’s older accessory-dwelling numbers are not automatically Trappe numbers because Trappe controls its own zoning. For planning, Maryland’s definition allows an ADU up to 75% of the primary detached home. Use our 75% ADU Size Calculator as a benchmark, then obtain Trappe’s current parcel-specific maximum and measurement method.
5. Attached, internal or detached? Ask before choosing a plan
Maryland’s state definition covers a separate structure or an addition, and Maryland Planning notes that jurisdictions may also permit wholly internal ADUs. That does not tell you which Trappe zoning approval, accessory-structure dimensions or building requirements apply. Before buying a prefab unit or garage-conversion plan, confirm authorization, setbacks, lot coverage, height, access and utilities.
6. Building approval is separate from zoning
Trappe publishes its own building permit application and fee schedule. Its permit page says new residential construction requires inspection and a Certificate of Occupancy. It currently lists a $310 building permit fee for construction under 3,500 square feet and a $25 certificate fee. Fees change, so verify them when applying.
7. Fire sprinklers could materially affect cost
The Town permit page states that fire sprinklers are required for all new construction, residential and commercial. Ask how this applies to an internal conversion, attached addition, detached site-built ADU or modular unit before comparing contractor quotes.
8. Renting the ADU triggers a separate licensing system
Trappe says it is unlawful to rent a unit without a Residential Rental License. Licenses expire June 30, renewals are due May 1, active occupied and unoccupied rental units must be registered, and inspections occur every other year. The Town currently lists a $30 long-term license fee per unit and $62.50 inspection fee. Verify current fees before budgeting.
9. ADU approval does not automatically authorize Airbnb
Trappe maintains a separate short-term rental application and lists Ordinance 5-2023 — Short Term Rentals. Maryland HB 1466 does not remove local power to regulate short-term rentals. If Airbnb/VRBO income is part of your project economics, verify that use independently before construction.
10. Water and sewer belong in the feasibility check
Trappe operates municipal utilities. Its current utility page lists residential basic sewer and water service charges per unit and describes roughly 500 water connections. Ask whether an ADU can share existing service, whether upgrades or separate connections are required, and what capacity/connection charges apply before final plumbing and site design.
11. Trappe homeowner checklist
- Confirm the parcel is inside Trappe.
- Identify the zoning district under the current zoning ordinance.
- Ask which section currently authorizes the ADU.
- Ask whether an HB 1466 amendment has been adopted or is pending.
- Confirm maximum size and measurement method.
- Confirm treatment of internal, attached and detached configurations.
- For detached units, verify setbacks, height, lot coverage and access.
- Confirm water/sewer capacity and connection requirements.
- Ask about fire sprinklers for your construction type.
- Map the permit and certificate-of-occupancy process.
- If renting, budget for rental licensing/inspection.
- Verify short-term-rental approval separately if relevant.
Trappe MD ADU FAQs
Do Talbot County ADU rules apply inside Trappe?
No. Trappe is an incorporated municipality with its own zoning framework. Do not automatically apply Talbot County’s ADU size, lot or parking rules to an in-Town property.
Does Trappe have a current zoning ordinance?
Yes. The Town’s official archive lists Ordinance 3-2025 as its Zoning Ordinance, and the Planning Commission page links the ordinance and map.
How big can a Trappe ADU be?
Do not borrow the Talbot County limit. Maryland’s state framework uses an ADU definition of up to 75% of the primary detached dwelling. Ask Trappe which local maximum and measurement method are currently effective.
Can I convert my garage?
Possibly. Confirm zoning authorization, accessory-structure dimensions, building-code conversion requirements, utilities and fire-safety requirements before buying plans.
Can I build a detached backyard ADU?
Maryland’s definition can include a separate structure, but Trappe must confirm the effective local approval and dimensional rules. State eligibility does not establish a buildable location.
Do I need a Trappe building permit?
Construction is subject to the Town’s permit system. The Town says new residential construction requires inspection and a certificate of occupancy. Confirm the exact package for your ADU type.
Will my ADU need fire sprinklers?
Trappe’s permit page says fire sprinklers are required for all new residential and commercial construction. Ask how that applies to your specific ADU configuration before budgeting.
Can I rent my Trappe ADU long term?
If the unit and rental use are lawful, Trappe separately requires a Residential Rental License. Active rental units must be registered and are subject to inspections.
Can I use the ADU as an Airbnb?
Do not assume so. Trappe has a separate short-term-rental framework and Ordinance 5-2023. Verify STR eligibility independently from ADU approval.
Can the ADU share existing water and sewer?
Ask the Town before designing utilities. Capacity, connections, metering and charges can be project-specific.
What should I ask Town Hall before buying plans?
Give staff the address and ask for the zoning district, current ADU authorization, maximum size, attached/detached standards, setbacks, parking, utilities, sprinkler treatment and approval sequence.
Primary sources checked
- Town of Trappe — Planning Commission
- Town of Trappe — Council Ordinances
- Town of Trappe — Permits
- Town of Trappe — Rentals
- Town of Trappe — Water & Sewer
- Maryland Department of Planning — HB 1466 FAQ
Maryland ADU Guide is an independent research publication, not the Town of Trappe, Talbot County, a law firm, architect or contractor. Confirm parcel-specific requirements with the Town before spending money on design or construction.
What to do next
Start by finding the office that reviews your property. A mailing city or a county guide does not establish your parcel’s authority.
- Find Who Reviews My Property.
- Obtain your parcel identifier, survey, floor plans and utility records.
- Ask the reviewing office which current rules, supporting documents and approvals apply.
- Continue to your planning workspace.
Enable JavaScript to prepare a downloadable next-step brief. Planning guidance is not permit approval.