Darnestown, MD ignition interlock: 1 certified installer
1 in town, 29 more within reach of Darnestown
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1 certified center in Darnestown, run by 1 provider. Addresses below — call ahead, most centers fit devices by appointment.
Certified installation centers in Darnestown
Sorted by how far they are from the center of Darnestown. Where two providers work out of the same garage, we list the garage once with both names, and we include nearby towns when their center is closer than one of your own.
Compiled from providers’ own public location directories and deduplicated to unique physical places (how we build this index). Listing is not an endorsement, and no center pays to appear.
Not sure which center to call?
Send your details once and certified installers covering Darnestown will get in touch with availability and a price for your term. It costs nothing, and you are not committing to anything by asking.
We pass your details only to providers that are certified in Maryland. We never sell your information on, and you can tell them to stop at any time.
What it costs in Darnestown
Interlock pricing is set at state level, so what applies in Darnestown applies across Maryland. These figures come from the price schedule filed with the state.
| Charge | Amount | What it covers |
|---|---|---|
| Installation | $70–$150 | range across approved providers; many discount the initial install and account set-up |
| Monthly | $70–$100 | monitoring, with calibration every 30 days |
| Removal | Not published | not published separately by the MVA |
State guidance figure · Ignition Interlock Program Report — Maryland MVA · checked 2026-08-23
The fees nobody quotes you over the phone
These are charged on top of the three above, and they are where a cheap-looking Maryland quote turns expensive.
| Fee | Amount |
|---|---|
| Program enrollment fee | $47 (waivable on medical or food assistance) |
- Providers must fit a device within 10 days of a request and run a 24-hour emergency line.
- Providers must offer 50% off rental rates to drivers on assistance.
What Maryland requires
Maryland runs one of the oldest interlock programs in the country, and it is built as an alternative to losing your license rather than an addition to it. You get a "J" restriction and report to your provider every 30 days; they send the MVA a report covering high readings, missed or failed retests, tampering and how often the car was used.
- First offense: Set on referral by the MVA, a court or an administrative law judge; a repeat offender within five years faces a year of suspension or a year in the program, then a further restricted year
- Lockout threshold: 0.025% — the MVA states the car will not start above that reading; missed service visits, tampering and bypass attempts also count as violations
- Program run by: Maryland Motor Vehicle Administration
Why Maryland orders these devices
An interlock order is not a judgment about you personally — it is what the state does with every case of this kind, and the reason sits in the crash record.
Source: NHTSA Fatality Analysis Reporting System, 2020–2022. The count covers fatal crashes where police recorded that a driver had been drinking, which is narrower than the federal 0.08 BAC measure and therefore understates the real figure. Montgomery County runs at or below the Maryland average — the requirement is set state-wide regardless. What the device changes is measurable too: a car fitted with one cannot be started over the limit, which is why the order attaches to driving privileges rather than to the sentence.
Other cities in Maryland
If nothing in Darnestown works for you, a center one town over often has an earlier appointment — the price does not change.
Interlock questions in Darnestown
Where can I get an ignition interlock device installed in Darnestown, MD?
We index 1 certified installation point in Darnestown, run by Intoxalock. Addresses are listed above. Book with the provider your paperwork names, not the nearest one — a device approved in one state is not automatically approved in the next, and switching brands mid-term means a second installation fee.
How much does it cost to have an ignition interlock device installed in Maryland?
Maryland publishes its own figures rather than leaving it all to vendors: $70 to $150 to fit the device and $70 to $100 a month while it stays on the car. Removal is billed by the provider at the end of the term.
Can I drink one beer and still start the car in Maryland?
Almost certainly not. 0.025% — the MVA states the car will not start above that reading; missed service visits, tampering and bypass attempts also count as violations That is far below any drunk driving limit, which is the point: the device is not testing whether you are impaired, it is testing whether you drank. One drink shortly before a test is enough on most programs, and the fail is recorded whether or not you try again.
What does an ignition interlock device do?
An ignition interlock is a breath-alcohol tester wired into your car ignition. You blow into it before starting the engine; if your breath alcohol is above the state threshold, the engine will not start.
While you are driving, the device asks for rolling retests at random intervals. Every sample, skipped test, and lockout is recorded and sent to the agency monitoring your case.
All Maryland cities →Why Maryland requires it →What it costs in Maryland →DUI lawyers in Maryland →If the device recorded a violation →