Ridgely MD ADU Rules 2026: R-3 ADU Zoning Signal, Rental Registration & What to Verify

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Last researched: September 19, 2026. Ridgely is a good example of why homeowners should not rely on one old zoning PDF. The Town’s current Planning, Zoning & Codes page expressly warns that there may be updates to the Zoning Ordinance that are not available online and tells property owners to contact the office to verify current requirements.

We also found a September 17, 2025 Commissioners workshop document that describes the Town’s R-3 district as including “Single Family Residential, Single Family Residential with Accessory Dwelling Units (ADUs), and Group Homes.” That is useful evidence that Ridgely’s newer zoning framework contemplates ADUs, but the workshop document is not a substitute for the current adopted zoning text.

Homeowner takeaway: If your property is inside Ridgely, start with the Town Zoning Administrator. Ask for the current zoning ordinance provisions governing ADUs, the zoning districts where they are permitted, and any HB 1466 amendment adopted after the older online zoning attachment. Do not design from the Town’s older Comprehensive Plan or an outdated third-party summary.

Ridgely ADU planning snapshot

Question What we verified
Local zoning authority Ridgely has its own Zoning Administrator and Planning & Zoning Commission.
Online zoning warning The Town’s current Planning page says zoning updates may exist that are not available online and instructs property owners to verify requirements with staff.
Recent ADU zoning signal A September 17, 2025 Town workshop document describes R-3 as including single-family residential with accessory dwelling units (ADUs).
Older planning policy Ridgely’s older Comprehensive Plan recommended allowing “granny flats” for family members needing special care, while discouraging use of those units as unrelated rental housing.
2026 state-law issue Maryland now requires covered municipalities to authorize ADUs under a framework that includes the 75% size definition, setback limits, and parking-study/waiver requirements.
Rental registration The Town currently says all rental properties in Ridgely must be registered and lists a $200 registration fee.
Permit office The Ridgely Planning, Zoning & Codes office handles construction-related permits and code enforcement.
Current contact The Town currently lists Melissa Leonard as Assistant Clerk-Treasurer & Zoning Administrator, 410-634-2177.

Ridgely’s own website says the online zoning may be incomplete

This is the most important fact for a homeowner researching Ridgely online. The Town’s current Planning, Zoning & Codes page says most construction and development requirements can be found in the zoning ordinance or Town Code, but then adds a clear warning:

There may be updates to the Zoning Ordinance that are not available online.

The Town directs property owners to contact the Planning, Zoning & Codes office to verify requirements. That matters for ADUs because Maryland’s statewide law changed significantly in 2025 and requires local implementation by October 1, 2026.

For that reason, this guide does not invent current Ridgely ADU size, setback, parking, bedroom or owner-occupancy numbers from an older zoning attachment.

A 2025 Town workshop document shows ADUs in the R-3 zoning description

In September 2025, Ridgely held a Commissioners workshop concerning proposed domestic-poultry rules. The draft discussion document had to identify the zoning districts where chickens might be allowed, and it described R-3 as:

“Single Family Residential, Single Family Residential with Accessory Dwelling Units (ADUs), and Group Homes.”

That is not an ADU ordinance by itself. It is, however, a useful current Town document showing that “Accessory Dwelling Units (ADUs)” had become part of the Town’s R-3 zoning terminology by September 2025.

Before assuming the R-3 district is the only ADU district or that every R-3 lot qualifies, ask the Zoning Administrator for the current use table and supplementary standards.

Ridgely’s older Comprehensive Plan used the “granny flat” concept

Ridgely’s older Comprehensive Plan discussed accessory apartments or “granny flats” in the Town Center context. The Plan recommended making provisions for accessory dwellings used by related family members who required special care, while warning that these units should not become a way to increase density through unrelated rental housing.

That policy language helps explain Ridgely’s historical approach, but it should not be treated as the current 2026 legal rule. Maryland’s modern ADU statute is broader and is not limited to family members needing care.

If a Town staff member or older document uses “granny flat,” “accessory apartment,” or “accessory dwelling unit,” ask whether those terms now refer to the same use under the current ordinance.

Maryland’s 2026 framework changes what local ADU rules can require

Maryland’s HB 1466 framework requires local governments with planning and zoning authority to adopt a law authorizing ADUs by October 1, 2026.

The Maryland Department of Planning says the state framework includes several important limits on local regulation:

  • an ADU can be up to 75% of the size of the primary single-family detached dwelling;
  • a covered jurisdiction may not set a lower local maximum;
  • ADUs are excluded from residential-density calculations;
  • side and rear ADU setbacks cannot be more restrictive than existing accessory-structure setbacks;
  • additional off-street ADU parking requires a parking study; and
  • a local law imposing additional parking must provide a waiver process.

Maryland’s definition also contemplates attached and detached ADUs, while local laws may additionally allow units created wholly inside the primary dwelling.

Use our Maryland ADU size guide for the statewide framework, then ask Ridgely which current local section implements it.

Do not assume Caroline County’s ADU rules apply inside Ridgely

Ridgely is an incorporated municipality with its own zoning authority. Caroline County’s ADU rules apply to unincorporated County property and should not automatically be used for a parcel inside Ridgely.

For land outside the Town, use our Caroline County ADU Rules guide. If you are unsure whether the parcel is inside the municipal boundary, use the Maryland ADU Jurisdiction Finder.

Rental registration matters if the ADU will be rented

Ridgely’s current Planning, Zoning & Codes page says all rental properties in the Town must be registered. The Town currently lists a $200 rental-registration fee and directs owners to submit the rental-registration form to the Town Office.

If a new ADU will be rented rather than occupied only by family, ask whether:

  • the ADU needs its own rental registration;
  • the principal property and ADU are covered under one registration or separate registrations;
  • a rental inspection is required before occupancy;
  • the registration must be renewed; and
  • any owner-occupancy or lease restrictions appear in the current ADU ordinance.

The Town handles zoning and construction-related permits

Ridgely’s Planning, Zoning & Codes office says it handles construction-related permits, rental inspections, code enforcement and long-range land-use planning.

The Town’s published permit guidance also says property owners planning improvements within Town limits should contact the Town Office to determine whether a permit is needed and that zoning/building permits are required for common projects such as additions, accessory structures, renovations and other construction.

For an ADU, ask the Town which approvals are required for:

  • zoning use approval;
  • an internal conversion;
  • an attached addition;
  • a detached ADU or garage conversion;
  • building inspections;
  • electrical and plumbing permits;
  • water/sewer connections;
  • rental registration; and
  • final occupancy.

Water, sewer and fire-sprinkler requirements can affect the project

Ridgely operates municipal water and sewer systems. The Town’s Building Construction chapter also incorporates the Maryland Building Performance Standards and contains residential fire-sprinkler provisions for new and renovated one- and two-family dwellings, including connection to the municipal water supply when adequate pressure, capacity and sizing are available.

Whether a particular ADU triggers those building-code provisions depends on the project type and current code interpretation. Before final design, ask whether the ADU requires:

  • a separate or upgraded water service;
  • a separate sewer connection;
  • additional connection or impact fees;
  • fire-sprinkler work;
  • backflow protection; or
  • utility-capacity review.

Ridgely was actively updating its zoning and Comprehensive Plan in 2025

Ridgely Planning & Zoning agendas from 2025 explicitly listed both a Zoning Ordinance Update and Comprehensive Plan Update under reports and updates.

That timing is relevant. The Town was revisiting its land-use framework during the same period Maryland’s statewide ADU requirements were taking effect. The September 2025 workshop reference to R-3 with ADUs is consistent with the possibility that Ridgely’s newer zoning language differs materially from the older attachment still surfaced through eCode.

The Town’s current website confirms the practical result: homeowners should contact staff because online zoning may not contain every update.

What to ask Ridgely before paying for plans

  • What is the current adopted zoning section governing ADUs?
  • Which zoning districts currently permit ADUs?
  • Does R-3 currently allow ADUs by right, with conditions, or through another approval process?
  • Are internal, attached and detached ADUs all permitted?
  • What is the current maximum size and how is the primary dwelling measured?
  • What accessory-structure setbacks apply to a detached ADU?
  • What height and lot-coverage standards apply?
  • Is owner occupancy required?
  • What parking requirement and waiver procedure apply?
  • Has the Town completed an ADU parking study if extra parking is required?
  • Can an existing garage be converted?
  • What water/sewer and fire-sprinkler requirements apply?
  • If the ADU will be rented, what rental-registration and inspection requirements apply?
  • Which building, electrical, plumbing and occupancy permits are required?

Ridgely homeowner checklist

  1. Confirm the parcel is inside Ridgely municipal limits.
  2. Ask the Zoning Administrator for the current zoning district and ADU provisions.
  3. Do not rely only on the older online zoning attachment.
  4. Confirm whether R-3 or another district permits the proposed ADU.
  5. Verify the current size calculation under Maryland’s 75% framework.
  6. Determine whether the unit will be internal, attached or detached.
  7. Verify setbacks, height and lot coverage.
  8. Confirm parking and any waiver process.
  9. Ask about water, sewer and sprinkler requirements.
  10. If the unit will be rented, confirm rental registration and inspection requirements.
  11. Prepare a recorded plat or accurate site plan before final design.
  12. Do not make a non-refundable prefab or construction commitment until the Town confirms the current rules in writing.

Ridgely MD ADU FAQs

Does Ridgely allow ADUs?

A September 2025 Town workshop document describes R-3 as including “Single Family Residential with Accessory Dwelling Units (ADUs).” The Town’s current Planning page also warns that zoning updates may not be available online. Ask the Zoning Administrator for the current adopted ADU standards before applying.

Which Ridgely zoning district allows ADUs?

The strongest current public signal we found is the Town’s September 2025 workshop document describing R-3 as including single-family residential with ADUs. That workshop document is not the zoning ordinance itself, so confirm whether R-3 is the only ADU district and what approval standards apply.

What is the maximum ADU size in Ridgely?

We did not publish a Ridgely-specific maximum because the Town itself warns that online zoning may not contain current amendments. Maryland’s statewide framework allows an ADU up to 75% of the primary detached dwelling, and covered jurisdictions may not impose a lower local maximum. Ask Ridgely for the current implementing section.

Can I rent a Ridgely ADU?

Ridgely currently says all rental properties in Town must be registered and lists a $200 registration fee. Ask whether a rented ADU needs separate registration, inspection or owner-occupancy compliance under the current ADU ordinance.

Are Ridgely ADU rules the same as Caroline County?

No assumption should be made. Ridgely has its own municipal zoning authority. Caroline County zoning applies to unincorporated County property, while an in-Town parcel should be checked with Ridgely first.

Who should I contact about a Ridgely ADU?

Start with Ridgely Planning, Zoning & Codes at 2 Central Avenue, Ridgely, Maryland 21660. The Town currently lists Melissa Leonard as Assistant Clerk-Treasurer & Zoning Administrator at 410-634-2177.

Primary sources checked

Maryland ADU Guide is an independent research publication, not the Town of Ridgely, Caroline County, a law firm, architect or contractor. Ridgely’s current website specifically warns that zoning updates may not be available online. This page therefore distinguishes current Town signals from older planning materials and does not invent unverified dimensional standards. Confirm the current adopted ADU ordinance and parcel-specific requirements with the Town before spending money on design or construction.

YOUR NEXT PRACTICAL STEP

What to do next

Get Ridgely’s current ADU zoning text before choosing a plan or assuming an older online rule applies.

  1. Confirm who reviews the property.
  2. Ask the Ridgely Zoning Administrator for the current ADU provisions and zoning district.
  3. Gather your recorded plat, utility information and proposed ADU type.
  4. Continue to the Maryland ADU planning tools.

Planning guidance is not permit approval.