Maryland high-rise sprinkler rules, in plain language.
Two things changed for Maryland high-rise owners in the last three years, and they point in opposite directions. In January 2024 the State Fire Marshal said the old statewide order to sprinkler every existing high-rise by 2033 would not be enforced. What governs an existing building instead is a 12-year clock that starts at the building’s own violation notice, so there is no single statewide date. Then in May 2026 the Governor signed HB 149 as Chapter 422, which from October 1, 2026 ties sprinklers to a specific event: a substantial renovation of a residential rental high-rise that costs 40 percent or more of the building’s SDAT assessed value. One rule went quiet, one rule arrived, and most of the confusion we hear on the phone comes from mixing the two up.
This section keeps them apart. Each page below covers one question, cites the actual chapter or determination, and tells you what to do about it this year.
What Chapter 422 says, who it covers, what the renovation package includes, and when it starts.
Type in your SDAT assessed value and see the renovation figure that brings sprinklers with it.
The 12-year clock that runs from your building’s own violation notice, what the State Fire Marshal said in January 2024, and what boards should do now.
Tax treatment, state and county programs, and how to write the reserve study line so the money is there.
Who this is for
Owners and managers of apartment towers planning a renovation large enough to need a building permit, condominium and co-op boards that got a county letter about sprinklers, and the engineers and lenders who have to put a number on it. If you are a single-family homeowner, the rest of the site is for you and the cost guide is the right starting point.
What we do on a high-rise
Design and install NFPA 13 systems in occupied residential towers, phase the work floor by floor so units stay rented, coordinate the standpipe and fire pump upgrades the chapter folds in, and file the county permits. We also do the first step most boards actually need: a walk-through and written opinion on whether the building is covered at all, and roughly what it would cost if it is.
High-rise questions, answered
Does Chapter 422 force every Maryland high-rise to add sprinklers?
No. The new rule in Public Safety 9-102 applies to a residential rental high-rise that undergoes a substantial renovation, meaning permanent work meant to add value that costs 40 percent or more of the building’s SDAT assessed value, and only when that work gets its building permit on or after October 1, 2026. A building that is not renovated at that scale is not pulled in by this chapter.
What counts as a high-rise now?
The chapter replaced the old seven stories or 75 feet test. A high-rise is now a building where the floor of an occupiable story sits more than 75 feet above the lowest level of fire department vehicle access. Open-air parking structures and purely agricultural buildings are excluded.
Is the January 1, 2033 retrofit deadline still a thing?
Not as a statewide date. Maryland amended the NFPA 101 2033 provision, so an existing high-rise apartment building has 12 years from the date of its own original violation notice, and a building that has never been cited has no fixed date yet. On January 29, 2024 the Office of the State Fire Marshal said the Commission’s general determination that existing high-rises be retrofitted will not be enforced. Montgomery County runs its own program under county law, so buildings there should read the county notice, not the state headline. Our 2033 status page walks through it.
We are a condominium, not a rental building. Does any of this reach us?
Chapter 422’s renovation trigger is written for residential rental high-rises. A condominium with a large share of rented units, or one planning a major renovation, should have counsel read the definition against the building before assuming it is out. The county program question is separate and depends on where the building sits.
What does a high-rise sprinkler retrofit cost?
Occupied high-rise retrofits run well above the single-family numbers on our cost page. The spread depends on riser routing, standpipe and fire pump condition, ceiling types, and whether units can be phased while people live in them. We walk the building, read the existing standpipe and pump reports, and give a per-floor figure before anyone commits to a plan.
Ask about your building
Send the address and what you are planning. We reply with whether the chapter reaches the building, and what a walk-through would tell you.
Permit going in after October 1?
Call before the plans are stamped. The sprinkler decision changes the budget, the phasing, and the schedule.
Call (240) 222-5257