Roof Deck Planting in Charlestown, MA

A roof deck on the Bunker Hill slope faces a different set of problems than one three miles away. Brick row houses here were built shoulder to shoulder, so the deck is often the only usable outdoor space on the property, reached by a bulkhead stair or a narrow interior run with no room for anything wider than a two-person crew. Salt air off the Navy Yard shortens the life of ordinary nursery stock and hardware. And if the deck or anything visible from the street falls inside the Charlestown Historic District, the planting plan needs to survive a design review before it survives a nor’easter.

What Roof Deck Planting looks like in Charlestown

Most of the roof decks we work on in Charlestown sit atop three-story rowhouses built before 1900, where the roof structure was framed for snow load and reroofing, not for soil weight, water features, or a run of full-size planters along a parapet. Before any design conversation, we get an engineer’s read on live load capacity, because the answer changes what the planting scheme can carry — a lightweight aggregate soil mix and fiberglass or resin containers instead of glazed ceramic or stone, wind-rated trellis anchoring instead of freestanding screens.
Access is the second constraint, and it is a Charlestown problem specifically. Many of these properties have no elevator, no loading dock, and a front door that opens directly onto a narrow street with permit parking and no room for a delivery truck. We plan material delivery around resident parking rules and building egress, and we build up plant material and soil in stages that a two-person crew can carry through a house rather than staging a full pallet at the curb.
Light on these decks is usually better than the tight rear courtyards below — most Charlestown roofs get full sun from midday on — but wind off the harbor is constant and comes with salt. We select plant material for wind tolerance and salt resistance rather than for what would perform in a sheltered Back Bay courtyard: ornamental grasses, hardy sedums, boxwood cultivars bred for coastal exposure, and perennials chosen to hold their structure rather than fold in a gust. Irrigation lines and low-voltage lighting fixtures are run in marine-grade or UV-stabilized housing, because standard-grade fittings corrode faster this close to the water.
If any part of the deck, railing, or planting is visible from Main Street, Monument Avenue, or another street within the Historic District boundary, the plan goes through Boston Landmarks Commission review before installation. We draft materials and elevations with that review in mind from the first design pass, rather than designing first and adjusting after a rejection.

What we account for here

Historic District sightlines

Charlestown’s Historic District review applies to anything visible from a public way, which on a rowhouse roof can mean the parapet planters, a pergola, or even a tall grass swaying above the roofline. We document sightlines from the street during the design phase and select materials and heights that are likely to clear commission review, so the project isn’t redesigned mid-approval.

No-elevator, narrow-stair access

A large share of the housing stock here predates elevators entirely. We plan soil, container, and plant deliveries in loads that match what a two-person crew can carry up an interior stair or through a bulkhead, and we sequence the work so the roof isn’t half-built and blocked by material for days at a time.

Salt air and wind off the Navy Yard

Decks facing the water take a steadier, saltier wind than anything a few blocks inland. Plant selection, hardware finish, and container material are all chosen for that exposure specifically, not substituted in after something ordinary fails a season in.

Structural load on pre-1900 roof framing

Many Charlestown roofs were never engineered for garden weight. We work from an actual load assessment, not an assumption, and design the planting scheme — container weight, soil volume, water retention — to stay within what the structure can carry safely and legally.

Recent Charlestown work

A recent project on the Bunker Hill slope involved converting an underused roof deck on a brick rowhouse into a working outdoor room: lightweight aggregate planters along the parapet for wind-tolerant grasses and boxwood, a drip line run through the container bank on a timer, and low-voltage lighting along the stair and seating edge. The planting plan was drafted with Historic District sightlines in mind from the outset, since the parapet is visible from the street below, and cleared review without a redesign. This kind of project — small footprint, real structural constraints, a visible elevation — is typical of the roof deck work we do in this neighbourhood.

Other services we provide in Charlestown

Roof deck planting is one part of the work we do across Charlestown properties. Many clients pair it with garden design and installation for the ground-floor courtyard below, ongoing fine gardening and maintenance to keep both spaces looking considered through the season, and container and window box planting for street-facing facades that fall under the same Historic District review as a roof deck. Where the deck or courtyard needs an automated watering plan, we install drip irrigation built for salt-air hardware, and where a client wants the space usable after dark, we add low-voltage landscape lighting run on the same marine-grade fittings we use on the roof. A full view of what we do across the neighbourhood is on our Charlestown garden services page.

Start with a site visit

We’re based at 5 Crescent St, Charlestown — 0.0 miles from every property on the Bunker Hill slope and around the Navy Yard. Call to set up a site visit: we’ll assess roof access, structural load, and any Historic District exposure on-site, and follow up with a planting plan and quote within the week. (617) 555-1234

What Our Customers Say

Frequently Asked Questions

Does a Charlestown roof deck planting plan need Historic District approval?

If the deck, railing, or plant material is visible from a public way inside the Charlestown Historic District boundary, yes — it goes through Boston Landmarks Commission review. We check sightlines during design and build the plan around what is likely to clear review, rather than submitting a plan drafted without that constraint.

Can my rowhouse roof actually support planters and soil?

Not always, and not without checking. Much of Charlestown’s housing stock predates modern roof load standards. We start from a structural load assessment and design the planting scheme — container weight, soil mix, water volume — to stay within what the roof can carry.

How do you get materials up to a roof with no elevator?

We plan deliveries around your building’s access — bulkhead, interior stair, or hoist where one is available — and bring soil, containers, and plants up in loads a two-person crew can carry, sequenced so the work doesn’t stall on the roof.

Will regular container plants survive the wind and salt air near the Navy Yard?

Ordinary nursery stock and standard-grade hardware wear out fast this close to the water. We plant for wind tolerance and salt resistance specifically and specify marine-grade or UV-stabilized fittings for irrigation and lighting on any deck with harbor exposure.

Do you handle both the roof deck and the courtyard below on the same property?

Yes. Many Charlestown rowhouses have a tight rear courtyard at grade and a roof deck above, and we often design and maintain both as one property, coordinating access and scheduling across a single visit.