Newbury, Massachusetts
Old Town, Byfield and Plum Island: three rulebooks in one Newbury
- Old Town
- Upper Green
- Lower Green
- Byfield
- Plum Island
Newbury asks a different first question depending on where the house sits. In Old Town it is how old the frame is and whether the Historical Commission gets a say. In Byfield it is what the septic system was permitted for. On Plum Island it is lot coverage, pilings and the flood map. Sorting out which set applies is our first job on any Newbury project.
About 17.4 miles from Peabody to Newbury. Straight-line distance to our Peabody base
Houses here
The houses of Newbury, era by era
Newbury was settled in 1635 and splits into three places. Old Town runs along Route 1A between the Lower and Upper Greens, lined with early houses and former farmhouses. Byfield lies west of Route 1, with neighborhoods set among the farms that remain. The third is the town's share of the Plum Island barrier beach. The town lies in the Parker River watershed and the Great Marsh, and its 2024 hazard mitigation plan mapped close to half its area in the 100- or 500-year floodplain.
17th century
17th-century houses in Old Town
Old Town has some of the oldest houses in the region: the James Noyes House from the second half of the 17th century, the Spencer-Peirce-Little Farm (c. 1690, a National Historic Landmark), and the Coffin and Swett-Ilsley houses. Frames like these carry centuries of repairs. If the Assessor dates a structure to 1820 or earlier, removing any part of it, an ell or a rear wall included, goes to the Historical Commission first.
02
Wood-frame houses around the Upper Green
The Newbury Historic District, on the National Register since 1976, takes in the Upper Green and the houses facing it on High Road, Green and Hanover Streets, then runs north along High Road to the Newburyport line. Most of its buildings are wood-frame houses. Being in the district makes a building subject to the town's demolition review regardless of its date.
03
Byfield neighborhoods among the farms
Byfield mixes residential streets with remaining farmland. Almost half of Newbury's homes predate 1960 and nearly 80 percent are detached single-family houses. In Byfield those houses are on septic, with water from the Byfield Water District, so the septic permit sets the bedroom count for any addition or ADU.
04
Plum Island houses on small lots
Year-round and seasonal homes on the island sit on small lots under the Plum Island Overlay District: 20 percent lot coverage, a floor area ratio of 25 percent, two stories and 35 feet. Decks, sheds and exterior stairs count toward coverage, and covered decks count toward floor area. Salt air calls for stainless or hot-dip galvanized connectors.
Before you build
Before you build in Newbury
What local rules, the ground and the energy code ask of a project here, each with the source we checked. Rules change and some depend on the parcel, so we confirm them with the building department before anything is drawn.
Historic district
A nine-month demolition delay that covers partial demolition
Newbury's historic preservation bylaw reviews any structure the Assessor dates to 1820 or earlier, anything listed on or eligible for the National Register, and anything the Commission flags. Removing any portion of a structure counts as demolition; interior-only permits do not. A preferably-preserved finding holds demolition and new building permits on the lot for nine months. Read how we approach historic renovation.
Guide: Historic district renovation on the North Shore: what needs approval and what doesn'tSource : Town of Newbury Code, Chapter 65 Historic Preservation
Coastal & wetlands
Barrier beach rules stricter than the state's
Newbury's wetlands bylaw bars new development in FEMA V and AO zones and allows redevelopment there only to current standards and only if all footprints on the lot total no more than 20 percent of its area. New buildings near banks or dunes must be set back by 30 times the average annual erosion rate. A large renovation in a flood zone can also trigger the FEMA 50 percent rule.
Permits
Plum Island permits run through several boards
According to the town's Plum Island guidelines, most exterior work on the island, from additions and decks to sheds, generators and solar panels, goes to the Conservation Commission. Work that adds coverage, floor area or height goes to the ZBA, starting with a denial letter from the Building Commissioner, and Newburyport Water and Sewer signs off when rooms are added. New construction goes on pilings or piers. See coastal homes.
Guide: Hiring a contractor in Massachusetts: what the law requires and what to checkSource : Town of Newbury Plum Island Guidelines (Inspectional Services)
Septic
Sewer on the island and parts of Old Town only
Public sewer reaches Plum Island and sections of Old Town through Newburyport's treatment plant. Byfield and the rest of town are on individual septic systems, so Title 5 limits how many bedrooms a lot can support. On Plum Island, a one- or two-bedroom house may add only one bedroom. More in Title 5 and adding bedrooms.
ADU rules
ADUs approved by the Building Commissioner, with stamped plans
Under the bylaw passed at the April 2025 Town Meeting, an ADU up to 900 sq ft, or half the house if smaller, can be approved by the Building Commissioner with a building permit. Neither unit has to be owner-occupied, the ADU cannot be a short-term rental, and combined bedrooms cannot exceed septic capacity. Applications need an engineer- or surveyor-stamped site plan and architect-stamped floor plans and elevations. Confirm current rules with the Building Commissioner, and see our ADU law guide.
Source : Town of Newbury Certificate of Vote, Article 28, April 29, 2025 ATM
Energy code
Stretch code since 2020
Newbury voted for the Stretch Energy Code at the June 2020 Town Meeting; the state's adoption list shows it in effect from July 1, 2020. It is not on the Specialized code. An addition of more than 1,000 sq ft of conditioned space needs a HERS rating with a blower-door test. See the stretch code and additions.
Source : Town of Newbury Code, Chapter 89A Stretch Energy Code
Penney in Newbury
Our nearest work to Newbury
There is no Newbury project on our current job list. These are the closest ones, from the same list. Client names and addresses stay private.
Nearby: Rowley
- CompleteExterior restoration: windows, siding, casings, cupola and weathervane, gutters
Nearby: Hamilton
- UnderwayFirst-floor renovation: open kitchen and living room, a new bedroom and full bath, laundry relocated
- Complete43 full-frame window replacements and a French door
As of September 2026
What we build here
What we build in Newbury
Historic renovation
In Old Town even taking down an ell can go to the Historical Commission. We document the existing frame, plan what stays, and file before demolition is on the schedule rather than after.
Coastal homes
On Plum Island we run the coverage, floor-area and substantial-improvement numbers before the scope is final, and plan deliveries and inspections around storms and high tides that can cut off island access.
ADUs and in-law suites
Newbury's ADU application needs stamped site and architectural drawings even for an administrative approval. We coordinate that package, surveyor or engineer and architect included, with the septic, reserve area, well and parking already worked out.
Home additions
Most Byfield additions start with the septic permit and reserve area. If the bedrooms you want exceed the design flow, we price the upgrade alongside the addition so the number is real from the start.
Questions
Questions we hear in Newbury
Can I add an ADU in Newbury, and who approves it?
Yes. Under the bylaw adopted at the April 2025 Town Meeting, an ADU up to 900 sq ft, or half the main house if smaller, can be approved by the Building Commissioner with a building permit, and the ZBA can allow up to 15 percent more by special permit. Neither unit has to be owner-occupied, but the ADU cannot be a short-term rental, combined bedrooms cannot exceed what the septic is permitted for, and the application needs a stamped site plan and architect-stamped drawings. Confirm current rules with the town.
What can I add to a house on Plum Island in Newbury?
The overlay district caps lot coverage at 20 percent and floor area ratio at 25 percent, and limits homes to two stories and 35 feet. A one- or two-bedroom house may add only one bedroom. New construction goes on pilings or piers. Most exterior work needs Conservation Commission approval before a building permit, anything that adds coverage, floor area or height needs the ZBA, and Newburyport Water and Sewer signs off when rooms are added.
Will the Historical Commission review my plans to remove part of an old house?
If the Assessor dates the structure to 1820 or earlier, if it is in the Newbury Historic District or otherwise listed on or eligible for the National Register, or if the Commission has flagged it, a demolition permit for all or part of it goes to the Historical Commission first. A preferably-preserved finding can hold demolition and new building permits on the lot for nine months.
Sources
Facts checked September 30, 2026Job list as of September 2026
- 01Town of Newbury Code, Chapter 65 Historic Preservation
- 02Town of Newbury Code, Chapter 95 Wetlands
- 03Town of Newbury Code, Chapter 89A Stretch Energy Code
- 04DOER: Municipal energy code list CSV (as of June 2026)
- 05Town of Newbury Certificate of Vote, Article 28, April 29, 2025 ATM (ADUs)
- 06Town of Newbury Plum Island Guidelines
- 07Newbury 2024-2029 Housing Production Plan
- 08Newbury 2026 Zoning Recodification booklet (floodplain and Plum Island overlay text)
- 09Wikipedia: Newbury Historic District
- 10Wikipedia: James Noyes House
- 11Wikipedia: Spencer-Peirce-Little Farm
- 12Wikipedia: Newbury, Massachusetts
Town rules change, and some depend on the parcel. We use these as a starting point and confirm with the building department, planning office or conservation commission before design.
Start a project
Tell us about your house in Newbury.
We walk it with you, measure, check what the town will require, and talk through design, budget and schedule before anything is drawn.
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(978) 854-5383