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Annapolis, MD Building Safety: Fire Sprinkler Requirements (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Trigger
New build or 50%+ renovation
Threshold
Construction area exceeds 50% gross floor area
Standard
NFPA 13, 13D, or 13R systems
Exempt
Carports, garages, greenhouses, sheds
Incentive
One-time property tax credit available

Summary

New residential construction and major renovations in Annapolis exceeding 50% of gross floor area must install an automatic fire sprinkler system before a building permit issues, per the city's amended Residential Code.

P2904.1 Fire sprinkler systems required. Residential fire sprinkler systems are required as follows when a building permit is requested from the City of Annapolis:

1. All new residential construction. New residential construction shall mean and include single-family, duplex, and multi-family residential buildings or structures, the placement of mobile or modular homes, and any existing residential building or structure that is removed, renovated, refurbished, altered, and/or an addition is made to the structure provided the area of construction, as a percentage of the gross floor area of the structure under permit, exceeds 50 percent. For structures with more than one building permit, the aggregate of the area of construction is counted over the previous 24 months. Accessory or uninhabitable structures, such as carports, garages, greenhouses and sheds are excluded.

2. Automatic fire sprinkler systems shall be installed and maintained in accordance with Chapter 17.20 of the Code of the City of Annapolis.

3.In Section 302.1 of the International Residential Code, add Exception #6 to read as follows:6.Decks and attached unenclosed accessory structures. Projections shall not extend over the lot line.B.In the event of any inconsistencies between the provisions of the International Residential Code and the City Code, the more stringent code shall govern. A copy of the International Residential Code is on file in the Department of Planning and Zoning.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 2025 Update 2).

Full Breakdown

Annapolis's amended International Residential Code requires automatic fire sprinklers whenever a building permit is requested for new residential construction, single-family, duplex, or multi-family, or for an addition, renovation, or alteration where the construction area exceeds 50 percent of the structure's gross floor area (aggregated over the prior 24 months across multiple permits). Accessory or uninhabitable structures like carports, garages, and sheds are exempt. Systems must meet NFPA 13, 13D, or 13R as installed under Chapter 17.20. Owners who trigger the mandate can recoup costs: § 6.04.130 grants a one-time property tax credit up to the full cost of installation.

Violations & Fines

Constructing or substantially renovating a residence without the required sprinkler system violates the adopted Building/Residential Code; the Code Official can withhold approval or issue a stop-work order, and defying that order is a municipal infraction with a City Council-set fine.

Frequently Asked Questions

Does a new deck or shed in Annapolis need a fire sprinkler?
No. Accessory or uninhabitable structures like carports, garages, greenhouses, and sheds are excluded from the sprinkler mandate, even when built under the same permit as habitable construction.
Can I get money back for installing a sprinkler system?
Yes. Annapolis City Code § 6.04.130 gives a one-time property tax credit up to the full cost of an approved sprinkler system installed after July 1, 2009, on a required residential structure.
Does a series of small remodels avoid the sprinkler rule?
No. When a structure has multiple permits, the City aggregates the construction area over the previous 24 months, so incremental renovations that add up past 50% of gross floor area still trigger the requirement.

Sources & Official References

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