Decks & Porches in Holliston, Massachusetts

Mass Save rebates cover heating and energy improvements, not deck construction. Holliston is Eversource territory, so residents are eligible for Mass Save for qualifying home energy upgrades. For deck projects, the relevant oversight is the Holliston Building Department and, for lots near Farm Pond or the Chicken Brook watershed, the Conservation Commission under the Wetlands Protection Act. The 60-year-old median home age means many existing decks in town were built before current ledger-flashing and guardrail standards. When a permit is pulled for a rebuild, inspectors will verify the ledger is properly flashed and the railing meets current height and baluster spacing requirements under 780 CMR.

File with the Holliston Building Department under 780 CMR. Any deck attached to the house requires a building permit with footing and framing inspections. Properties within 100 feet of Farm Pond, Chicken Brook, or any mapped wetland need a Notice of Intent reviewed by the Holliston Conservation Commission before the building permit issues. Footings must reach 48 inches below grade. Guardrails on surfaces 30 or more inches above grade must be at least 36 inches tall with baluster spacing under 4 inches.

Where a permit is required, decks & porches work in Holliston is filed with the Holliston Building Department; see the Holliston Building Department’s contact, portal and who pulls the permit on permits.llc.

Deck costs in Holliston and the Middlesex-MetroWest market run in the upper-middle range for Massachusetts. A 280-square-foot pressure-treated deck typically costs $14,000 to $20,000 installed. Composite decking (Trex, TimberTech) at that size runs $20,000 to $32,000. Three-season porch additions are popular in this market and run $24,000 to $44,000. Conservation Commission filings for wetland-adjacent lots add $500 to $1,500 and several weeks to the schedule. Structural repairs on 1960s-era decks are common and typically run $3,000 to $7,000.

Holliston is a Middlesex County town of 14,902 residents with 5,697 housing units averaging about 60 years old. The town straddles the Route 16 corridor between Milford and Ashland, with a mix of mid-century colonials, capes, and ranches on lots ranging from a quarter-acre in older sections to one acre or more in newer developments. Farm Pond is a prominent feature in the center of town, and the Chicken Brook watershed runs through residential areas, creating Conservation Commission jurisdiction over many rear yards. Nearby Medway and Sherborn share contractor resources with Holliston.