Dracut replaced its ADU bylaw in full at the June 2025 Town Meeting, so an ADU is available to you here. But one question decides a Dracut project before any other, and it is worth answering before you spend a dollar: is your parcel on town sewer, or on septic?
Article 22 passed at the Annual Town Meeting on 2 June 2025. The motion replaced Section 7.4, Accessory Dwelling Units, in its entirety, amended the Table of Permitted Uses, and added new definitions.
It passed on a simple majority, which is correct — the Affordable Homes Act lowered the threshold for ADU bylaws from two-thirds to a majority. Three other articles on the same warrant needed and got two-thirds, which confirms the town applied the distinction deliberately. The November 2025 Town Meeting carried no ADU articles, so §7.4 as adopted appears to be current.
We have not been able to retrieve the adopted text of §7.4, so we will not quote you a local cap. What holds regardless: the state protected-use floor applies whatever §7.4 says — 900 square feet or half your house, whichever is smaller — and no special permit may be required for a first ADU. Any provision of §7.4 imposing owner-occupancy, a deed restriction, an ADU cap, an attached-or-detached mandate or a minimum lot size is void as applied.
Dracut may well have granted something more generous than the state floor. It is worth one phone call to find out, and we would rather tell you that than guess.
Dracut has municipal sewer, but not everywhere, and the reason is structural. The town has no wastewater treatment plant of its own. It runs what the Sewer Department calls a consecutive system, discharging through Lowell to the Lowell Regional Wastewater Utility and through Methuen to the Greater Lawrence Sanitary District. That is why sewered coverage is patchy and capacity-constrained rather than uniform.
On a septic parcel, an ADU adds design flow under Title 5 — generally 110 gallons per day per added bedroom. If the existing system was sized for the existing bedroom count, and it almost always was, the ADU forces a full system upgrade. That commonly runs $25,000 to $50,000 or more, and on a constrained lot — poor soils, setbacks to a well or wetland, no reserve area — it can be infeasible at any price.
This is not a technicality that gets solved later. State law expressly preserves Title 5, so a protected-use ADU that cannot meet Title 5 cannot be built. Get the parcel’s sewer status, and if it is on septic, get the existing system’s design flow, its rated bedroom count and the Board of Health file, before anyone quotes a build.
This one catches people. Dracut’s water is not a town department. The Dracut Water Supply District is an independent district established by the Acts of 1905 and expanded in 1953 to take in part of Tyngsborough. It serves roughly 24,830 residents across portions of both towns, with two well fields, more than 100 miles of main, three storage tanks and eight booster pump stations, governed by its own three-member Board of Water Commissioners at 59 Hopkins Street.
Water service for a Dracut ADU is a separate application to a separate body from your building permit. Do not assume the Building Department coordinates it.
Stretch Code, effective 1 July 2018. Specialized Code not adopted. What is specific to Dracut is the timing: the permit checklist requires energy code documentation filed with the application, so that paperwork is due at permit time rather than later in the job.
Otherwise the standard Stretch package — HERS rater targeting 52–58 with the existing house excluded, a 50-amp EV-ready circuit per dwelling unit within six feet of a parking space, and a solar-ready zone of at least 300 square feet on a qualifying new detached unit.
Building runs $12 per $1,000 of construction cost. Wiring, plumbing and gas each run $20 per $1,000. Sheet metal $12 per $1,000. There is a $50 minimum on all permits. Certificate of occupancy $50. Re-inspection $50. Small Lot Submission Review $500. Work started without a permit is charged at double. The schedule took effect 1 July 2023, and construction cost is based on the contract amount plus change orders, or the Building Inspector’s own calculation.
What the Town asks for with the application: a certified plot plan, complete building plans in typically three sets, energy code documentation, engineering specifications for any LVLs or steel, the supervising licence-holder’s Construction Supervisor License number, home improvement contractor registration, the contractor’s workers’ compensation affidavit and a debris affidavit. That is Dracut’s checklist, reproduced so you know what a complete filing looks like.
Start the certified plot plan early. It needs a surveyor, and it is the usual schedule driver on an ADU here.
One local quirk: Dracut exempts detached sheds only under 10 by 12 feet, which is 120 square feet — stricter than the 200 square feet the residential code allows.
We would rather show you the gap than fill it with a guess. Confirm anything below with the town before you rely on it.
The text of §7.4 itself is the biggest gap here, and it drives several others: how Dracut treats detached versus attached versus conversion, whether it adds design or separate-entrance standards, whether it bans short-term rental, what dimensional standards it attaches, and whether it sets a local cap above the state floor.
Also unconfirmed: the sewer service area map — the single most important unresolved item for Dracut feasibility, and the reason we say to call the Sewer Department about your specific parcel rather than rely on a neighbour’s. The dollar amount of the sewer connection or impact fee. Whether the Board of Health has septic regulations stricter than Title 5 — assume stricter until someone confirms otherwise. Whether parts of town are on private wells, which the Water District’s own wording implies but does not state. Whether an aquifer or water supply protection overlay exists, which is likely given two well fields. The residential dimensional table. Attorney General approval of the June 2025 bylaw.
We build accessory dwelling units across the Merrimack Valley — supervised by Matthew Moisan under Massachusetts Construction Supervisor License CS-119855 — and we carry the permit set, the site plan review and the inspections. Tell us the address and we will tell you what the lot actually allows.