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Decks & Porches · Medfield, MA

Decks & Porches in Medfield, Massachusetts

Compare contractors serving Medfield, Norfolk County — call them directly, or send one request and let the ones who want the job come to you.

30 contractors serving Medfield — including 2 based in town.

Contractors serving Medfield

Claimed listings within 5 miles come first, then the rest by rating, then distance. Google ratings as of October 2026. How we list and rank contractors

Decks & Porches in Medfield — what to know

Rebates & incentives

Decks and porches are not eligible for Mass Save rebates. Medfield is in Eversource territory, but that applies only to energy work, not deck construction.

For permitting: the Medfield Building Department processes permits under 780 CMR for any attached or elevated deck. Because Medfield lies within the Charles River watershed and has substantial wetland coverage, the Conservation Commission under the Wetlands Protection Act is a routine step for many projects. File a Request for Determination with the Medfield Conservation Commission if any part of your deck footprint or its footings falls within 100 feet of a wetland, stream, or the Charles River itself. Inspectors check ledger attachment and flashing, guardrail height (36 inches minimum), and baluster spacing under 4 inches. Footings must reach approximately 48 inches in Norfolk County.

Permits in Medfield

The Medfield Building Department handles permits under 780 CMR. Key inspection points: ledger flashing, 36-inch guardrails, and sub-4-inch baluster spacing. Footings must reach 48 inches below grade. Conservation Commission review under the Wetlands Protection Act is a practical requirement for projects near the Charles River corridor or Medfield's many wetland pockets. Medfield has no designated historic district, so no added historical review applies for most properties.

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

Typical project cost

Deck costs in Medfield fall within the suburban-Norfolk-County range, above central MA but below Boston metro. A pressure-treated pine deck on a typical Medfield half-acre lot runs $16,000 to $27,000 installed; composite or PVC (Trex, TimberTech, Azek) runs $26,000 to $44,000. The larger lot sizes common here support bigger deck footprints, 500-square-foot or larger decks are not unusual. Three-season or screened porch additions on existing slabs or structures run $28,000 to $55,000. Wetland filing costs and timeline add to the total project picture when applicable.

About Medfield homes

Medfield is a quiet Norfolk County suburb of 12,844 residents with 4,583 housing units and a median home age of 54 years. The town developed primarily through the 1960s and 1970s on generous lots, many of a half-acre or more, giving it a spacious character relative to neighboring Walpole and Dover. Most of the housing is single-family colonials and ranches on wooded lots.

Medfield sits within the Charles River watershed, and the river itself runs along the town's eastern boundary. Wetland areas are distributed across town, particularly near the river corridor and on the lower-lying lots off Route 109. Deck projects on a meaningful portion of Medfield lots require at least a preliminary wetland determination before construction can start.

Common questions — Decks & Porches in Medfield

My Medfield lot is close to a stream that feeds into the Charles River. Do I need Conservation Commission approval for a deck?
Yes. Any project within 100 feet of a stream, wetland, or the Charles River in Medfield falls under the Wetlands Protection Act and requires a filing with the Medfield Conservation Commission. A Request for Determination is the right first step, it confirms whether a full Notice of Intent is needed and sets the sequence with the building department.
Our Medfield colonial was built in 1972. What surprises show up when we pull a deck permit?
Decks from that era in Norfolk County commonly have ledger boards attached without proper through-bolting or flashing, railings below 36 inches, and footings that do not reach the current 48-inch frost requirement. A permit application on an existing structure triggers a full review, so budget for potential structural upgrades before the surface re-decking.
We want a large deck on our half-acre Medfield lot. Any extra considerations?
Larger decks over 400 square feet often require an engineer's stamp on the plans before the building department will issue a permit. The footing layout gets more complex too, on a half-acre lot with multiple footing locations, a geotechnical assessment is occasionally requested to confirm soil bearing capacity.
Is composite decking worth the premium in Medfield's climate?
For wooded, shaded Medfield lots that stay damp through the spring, composite holds up significantly better than pressure-treated pine and resists the mildew and soft spots that show up on pine in those conditions. The $10,000 to $17,000 upfront premium over pine typically pays back in lower maintenance costs over 10 to 15 years.
How much does a screened porch addition cost in Medfield?
A screened three-season porch added to an existing deck or built on a new slab in Medfield runs $28,000 to $55,000 depending on size, foundation work needed, and screen system quality. If the existing deck structure is undersized for the added load, structural upgrades are required before enclosure framing begins.

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