Worcester is a three-decker city, and that shapes exterior work more than anything else. About a quarter of the city's housing units are in buildings of three or four units, according to the Census Bureau's 2024 survey, and most of those are the classic triple-decker that the Worcester Regional Research Bureau describes as "essentially a triplex that fits into residential blocks." Each one is a tall, narrow box with a flat or low-pitched roof, stacked porches on the front or back, and three floors of windows. Re-siding one is not like re-siding a ranch in Charlton or a colonial in Northborough.
Why siding and windows need two credentials
Window and siding replacement on an owner-occupied building of one to four units is treated as structural enough to need a supervisor. The state's table of covered work puts roof covering, siding and replacement windows in the group that needs both a Home Improvement Contractor registration and a Construction Supervisor License, a rule building departments have enforced since 2008.
In practice: the company you sign with should show up on the Contractor Hub as registered, and the building permit should carry the license number of an individual construction supervisor. Ask who that person is. On a three-decker job that will take weeks, it helps to know whether they will visit the site or only sign the application.
Gutter-only work is lighter, but when gutters go up as part of a siding or roof job, the same contractor's credentials cover the whole contract.
What sits under the vinyl
Many Worcester three-deckers were covered in vinyl or aluminum sometime after the war. Underneath is often the original wood clapboard, painted many times over, mostly before 1978, the cutoff year the state's lead rules use.
When that siding comes off, the old paint is exposed and disturbed. The Massachusetts Lead Law puts the burden on owners: in a pre-1978 home where a child under six lives, lead hazards have to be removed or covered, and the owner is liable for a child's poisoning even if they never knew the paint was there. Rental owners carry that risk for every unit with a young child.
So ask each bidder:
- Will the old clapboard be stripped, or will the new siding go over it?
- How will paint chips and dust be contained on the ground and kept off neighbors' yards?
- Who cleans up, and how?
- If a child under six lives in the building, are you prepared to work to lead-safe standards?
The answers affect the price and the schedule. A contractor who shrugs at the questions is not one to hire for a pre-war house.
Three stories of staging and a narrow lot
The city's triple-deckers often sit close to their neighbors, with a narrow driveway on one side and a few feet of yard on the other. Re-siding the tall side walls means pump jacks or full staging, and the crew may need a neighbor's permission to set it up. Ask how the contractor will reach the high walls and whether they will need access to the next lot.
Porches complicate things too. Stacked porches have their own trim, railings and ceilings, and their posts may need repair before new siding can tie in. Get the porch work priced separately so you can see it.
Gutters, downspouts and where the water lands
Gutters are the cheapest part of an exterior job and the one homeowners notice last. On a three-decker, a single run of gutter may collect water from a large roof and drop it at one corner, right beside the foundation and the neighbor's driveway. When the siding or roof is being redone, ask the contractor where every downspout will discharge and whether it can be carried away from the house with an extension or a splash block.
Ask too about gutter size. A wider gutter and larger downspouts handle heavy rain better on a big roof, and the price difference is small when the crew is already on staging. If your basement takes water in spring, mention it before the gutter plan is drawn, because the gutters are often part of the answer.
Out in the towns: clapboard, colonials and farmhouses
Beyond the city the housing changes and so does the exterior work. Subdivision colonials in Westborough and Grafton were often built with vinyl from the start, and the job is usually a like-for-like replacement after storm damage or fading. Older farmhouses in Petersham, Royalston or New Braintree may still have wood clapboard and old wood windows. Owners there often want to keep the look, and some choose to repair and repaint rather than cover the wood.
If you want to keep original wood windows, ask whether the contractor restores sashes or only replaces them. Ask for both prices. A crew that only installs replacement units will steer you that way, and it is useful to know what the other path would cost.
Re-siding permits from Worcester to Athol
Worcester's Building & Zoning division issues the permits for repairs and alterations, including re-siding and window replacement, through its online portal. The contractor applies, with the supervisor's license on the form. In Southbridge, Webster, Clinton or Athol, the town's building inspector issues the permit.
Keep the permit in the contractor's name. The home improvement statute makes the contractor responsible for permits and keeps the Guaranty Fund away from owners who file their own.
Insulation while the walls are open
Old three-deckers and capes often have little or no insulation in the walls. If the siding is coming off anyway, that is the cheapest moment to add it. Mass Save's insulation program pays 75% to 100% of approved insulation and air sealing, offers no-cost work to income-eligible households, and has separate offers for renters in one- to four-unit buildings.
Ask Mass Save how to schedule an assessment before the siding job, and ask your contractor whether they will coordinate. Program details for windows were not published in the same place, so confirm directly before assuming new windows qualify.
Wall area, window count and containment: reading a siding bid
The Greater Worcester calculator's default for a typical window, siding or gutter project is roughly $3,850 to $10,600. You can check your walls and windows against the local estimate. A full three-decker re-side, with staging and porch trim, will run beyond a typical project. Bids differ on:
- Siding material and grade, and whether trim is wrapped or replaced.
- Whether old siding is removed or covered.
- The number of windows and whether they are full-frame or insert replacements.
- Sheathing repair once the old siding comes off.
- Lead-safe containment and disposal.
Custom-sized windows and the one-third deposit
Exterior work over $1,000 needs a written contract under c.142A §2, carrying the registration number, the work dates, the materials and the payment plan. Up-front payment tops out at a third of the price. Custom-sized windows are a common special-order item, and the deposit can cover their real cost when that is higher; ask to see the order.
