Running an Airbnb in a sprinklered house in Northern Virginia: what the county asks, and when a rental stops being a house

Two kinds of owners ask us this. The first owns a sprinklered townhouse in Ashburn or Arlington and wants to list it for short stays without breaking a rule they have not heard of. The second owns a big house near Middleburg or Leesburg with no sprinklers and wonders whether renting it to wedding parties turns it into something the fire marshal wants sprinklered. The answers are different, and this article takes them in order.

Short term rental permits do not ask for sprinklers

Virginia let localities set up short term rental registries in 2017, and the Northern Virginia jurisdictions each did something with it. Fairfax County issues a short term lodging permit through zoning. Arlington has an accessory homestay permit. Alexandria and Loudoun run registrations, and Prince William adopted its own rules later. They differ on how many nights you can rent, how many guests can stay, and whether the owner has to live there, and those rules change often enough that you should read the current page for your county rather than a summary here.

What they have in common on the fire side is a short list: working smoke alarms, carbon monoxide alarms where there is fuel burning equipment, sometimes a fire extinguisher, and sometimes an exit plan posted for guests. None of them require fire sprinklers, and none of them treat an existing sprinkler system as a condition of the permit. Virginia has no residential sprinkler mandate, and a house rented by the night is still a house. If your townhouse already has a 13D system because the builder put one in, the permit does not care either way.

Where the line is: a house versus a lodging house

The sprinkler requirement enters from the building code, not the rental ordinance. A one or two family dwelling, rented whole to one party at a time, stays under the residential code no matter who is sleeping in it. What changes the picture is renting rooms separately to unrelated guests, the bed and breakfast model. The building code has a category for that, a lodging house, and a small owner occupied lodging house with a handful of guest rooms is allowed to be built as a house provided it has a 13D sprinkler system. Above that size it becomes a hotel type occupancy with a 13R system and a very different set of rules, covered in our 13D versus 13R article.

So the honest rule of thumb: renting your house is not a trigger. Converting your house into something with separately rented guest rooms and a breakfast table might be, and that is a conversation with the county building official before the first listing goes up, not after a complaint. In practice the wedding house near Middleburg rented whole to one family for a weekend is still a house. The same property with six locked bedroom doors, six separate bookings, and a host cooking breakfast is the one that gets the question.

The HOA may have its own view

Most sprinklered townhouses in Loudoun and Fairfax sit in an association, and many associations restrict or forbid short term rentals outright. That is a covenant question and comes before any of this. Where the HOA allows it, the HOA and townhouse article covers who owns the sprinkler system in a townhouse versus a condo, which decides who you call when a guest does something to it.

What a guest can do to a sprinkler system

Guests do the same things residents do, faster and without asking. The failures we see in short term rentals are the ones on the living with sprinklers page, compressed into a weekend.

• Hanging things from a head. A garment bag, a string of lights, a wet towel. A residential head is designed to open at a fire, not to hold a coat, and a hard tug breaks the bulb. That is the leading cause of accidental discharge in a rental.
• Closing the valve. A guest hears a drip somewhere, finds the riser in the utility closet, and closes the handle that looks most important. Now the house has no protection and nobody knows it. Tag the sprinkler valve and lock the handle open.
• Heat under a head. A portable heater on a shelf, a hot plate in a closet turned into a bar, a hair tool left running on a high shelf. Residential heads open around 155 degrees at the bulb, which is closer than people think to a heater pointed at the ceiling.
• Ignoring the bell. A guest who does not know what the bell means will silence it, or leave. The alarm article is the three minute version to put on the house card.

The house card, in three lines

Every short term rental has a card or a digital guidebook with the wifi password. Add three lines to it. Do not hang anything from the ceiling heads or the pipes. The red handled valve in the utility closet stays open. If the outside bell rings, leave the house and call 911. That is the whole training a guest needs, and it costs nothing.

Turnover: the two minute check

Whoever cleans between guests already walks every room. Give them three things to look at: every head still has its cover or its bulb and nothing is touching it, the gauge at the riser reads the same number it always reads (write the number on the tag), and the valve handle is open and locked. The landlord and tenant article has the longer turnover walk for a lease; the short term version is these three items and a photo of the gauge.

When a guest sets one off

A single head flowing for the ten minutes it takes to find the valve puts a lot of water into a room, and the discharge article has the arithmetic. The order of calls is the platform’s damage protection, your insurer, and the guest, in that order, and every one of them asks the same question: was this a fire, a guest, or a defect? Our post discharge inspection answers that in writing. The head gets replaced the same visit and the system goes back in service before the next check in. On the insurance side, make sure the policy actually knows the house is rented by the night; the insurance article covers what carriers ask, and a short term rental endorsement is a separate question from the sprinkler discount.

What this costs you

Nothing new. A sprinklered rental needs the same routine visit as any sprinklered house, a flat rate quoted before we come, on the inspections page. Owners who run several units often put them on the same day. If you are the second kind of owner, with the unsprinklered house and the bed and breakfast plan, the retrofit range on the cost page is $2 to $7 per sprinklered square foot, and the building official conversation comes first.