Landscaping in Cohasset, Massachusetts

Cohasset's defining challenge is its rocky coastal ground: thin soil over granite ledge on the uplands, salt exposure off the ocean and harbor, and tidal marsh in the low areas. Beds often need built-up loam and amendment, and the plant palette skews to salt- and wind-tolerant performers near the water, with more conventional choices possible on sheltered inland lots.

The ledge constrains digging, footings, and planting depth, making stonework and raised beds common. As a coastal Zone 6b town moderated by the ocean, Cohasset runs a milder season with later first frosts near the shore, though salt spray and wind shape plant placement as much as sun does.

Cohasset's harbor, salt marshes, coastal banks, and rocky shoreline make it heavily regulated for landscaping. Work near these resources falls under the Wetlands Protection Act and the state's coastal resource-area rules, so the Cohasset Conservation Commission reviews grading, clearing, and hardscape near water — typically through a Notice of Intent, with coastal-bank and marsh work scrutinized closely. Many lots sit in FEMA flood zones with added rules, and historic-district properties may need design review. Retaining walls over four feet generally require a building permit and engineered plans; ledge removal or blasting carries its own permitting. Check with Conservation before any coastal-edge work.

Cohasset landscaping prices are among the highest on the South Shore — ledge, salt-tolerant material, coastal access, and the town's estate-scale projects all push costs up. Routine mowing runs about $60–$110 per visit, spring cleanups $400–$900, and fall cleanups $450–$1,200. Mulch and amendment run roughly $90–$150 per yard installed. Irrigation for a sizable lot runs $5,500–$12,000. A bluestone or granite patio commonly lands at $12,000–$25,000, while a full coastal design-build with stonework, salt-tolerant plantings, and outdoor living space ranges from about $35,000 well into six figures.

Cohasset is an affluent South Shore coastal town in Norfolk County, home to about 8,300 people with roughly 3,300 housing units and a median home age near 66 years — older, substantial homes on a rugged Atlantic shoreline. The town's rocky coast, working harbor, and salt marshes define it, and households here invest heavily in their grounds, so the landscaping work leans toward design-build: layered plantings, bluestone and granite hardscape, screening, lawns, and outdoor living on rocky, salt-exposed estate lots.

That combination of money, mature properties, and a granite-and-salt-marsh coastline makes Cohasset's projects more ambitious — and more tightly regulated — than its inland neighbors.