Deck Building · Baltimore
Backyard decks from $9K. Rooftop decks from $20K. Composite, pressure-treated, or cedar. Every deck permitted and engineered.
40 Google reviews MHIC #149066 Fully insured
What's in the build
Trex, TimberTech, and AZEK composite for low-maintenance longevity in Baltimore's freeze-thaw winters, or pressure-treated and cedar for budget-conscious builds. We lay out both options with honest long-term costs so you can choose on the numbers, not the sales pitch.
Footings poured below the Maryland frost line, joists sized for real load. On a rooftop deck, a structural engineer signs off on your roof joists and party walls before a single board goes down. That step is non-negotiable, and we won't skip it.
Aluminum, cable, or pressure-treated railing to height and load code. Proper stair rise and run. For homes in Baltimore's historic districts — Federal Hill, Fells Point, Canton, Mount Vernon — a deck visible from the street needs CHAP review before the building permit.
We pull the building permit under MHIC #149066 and meet every inspection: footings, framing, and final. If your property needs CHAP approval first, we handle the submission and coordinate with Baltimore City. Unpermitted decks complicate closings — permitted ones don't.
How it goes
01
We visit the site, check the roof structure for rooftop builds, measure, and assess drainage and material access. Written estimate within 48 hours — no ballparks.
02
Building permit pulled under our MHIC license. Rooftop builds get a structural engineer's report confirming joist and wall capacity. Historic-district builds get CHAP submitted first — that process runs parallel to permit prep, not after.
03
Concrete footings below the frost line, pressure-treated or composite frame. Rooftop builds add a waterproof membrane tied into the parapet, with a pedestal or sleeper system so water drains underneath the deck boards.
04
Boards laid, railings set to code, stairs built. Final inspection scheduled and met by us. Cleanup, walk-through with you. Done.
Baltimore decks
Baltimore has two kinds of deck projects. There's the rooftop: flat-roofed rowhomes in Canton, Fells Point, Federal Hill, and Locust Point where "up" is the only direction left to expand. Then there's the urban backyard — a narrow strip behind a rowhome that's currently cracked concrete or a weed patch, waiting to become an outdoor room. They're different jobs with different budgets, and we build both.
A rooftop deck is partly an outdoor project and partly a building-envelope project. The composite boards are maybe 30% of what you're paying for. The rest is the structural engineer's report confirming the roof can hold the load, the waterproof membrane tied into the parapet so water drains underneath the deck and not into your top floor, and the roof hatch or interior stair for access. Get those wrong and you've bought a slow leak, not a deck. We won't rush that scope or skip the steps that protect the house.
Backyards are usually simpler, but Baltimore's tight lots have their own wrinkles. Materials often come through the house or over a fence when there's no alley access — that's real labor, and it's in the estimate. Drainage against the brick party walls matters. A built-in bench along the wall, string lights, and a planter or two turn a plain ground-level platform into the room everyone gravitates toward on summer nights.
Many Baltimore rowhomes in historic districts need CHAP review before a permit for any deck visible from the public street. We handle that submission and coordinate with Baltimore City so you're not managing two bureaucracies at once. For the full breakdown on costs, materials, CHAP, and rooftop pricing, see the deck cost and design guide. For the complete range of outdoor work, check the decks and patios service page. Line-item budget questions? See the pricing page.
★★★★★ 4.6 on Google · 40 reviews
★★★★★
Steven and his team completed a 3-level renovation of my newly purchased home. They took the time to ensure my vision was possible and within budget while keeping quality. Even after construction was completed they were just as attentive, answering any questions I had. I would choose Monarch Bay for any of my future renovation needs.
★★★★★
Steve and his team did a great job on my kitchen remodel. Sergio and Frank were respectful and did clean, quality work. From the demo phase to installing cabinets, granite and plumbing, the process went smoothly. The kitchen looks great and I will be going back to these guys for more work in the future!
★★★★★
Monarch Bay did an incredible job with the complete renovation of our master suite bathroom. All the old fixtures, cabinets, tub, shower, toilet, walls and flooring were removed and an extraordinary new bathroom resulted. We told them what we wanted and the team delivered. Our bathroom is stunning. We highly recommend Monarch Bay Renovations.
Common Questions
A ground-level or attached backyard deck runs about $30 to $50 per square foot in pressure-treated wood, or $45 to $90 per square foot in composite. A typical 300-square-foot backyard deck lands $9,000 to $18,000. Rooftop decks on Baltimore rowhomes run higher — usually $20,000 to $45,000 — because most of the cost is in the structural engineering, waterproof membrane, and roof access, not the deck boards themselves. We give written pricing within 48 hours of the walkthrough.
Yes, almost always. Baltimore City requires a building permit for a deck attached to your home or elevated more than a low threshold off the ground. Rooftop decks always need a permit and a structural review. If your home is in a designated historic district — Federal Hill, Fells Point, Canton, Mount Vernon, and others — a deck visible from the public street also needs CHAP approval before the building permit. We handle the permit applications, CHAP submissions where required, and all inspections as part of the job.
Both hold up, but the answer depends on your timeline and your tolerance for upkeep. Pressure-treated wood costs less up front but needs cleaning and re-sealing every year or two in Baltimore's humid summers and freeze-thaw winters. Composite — Trex, TimberTech, AZEK — costs more initially but is essentially maintenance-free for 25-plus years and won't rot, splinter, or fade. For a rooftop deck where getting up there to re-stain is a chore and water intrusion is the real risk, we almost always recommend composite.
Yes, and we build them regularly across Canton, Fells Point, Federal Hill, and Locust Point. The work involves a structural engineer's assessment of the roof joists and party walls, a waterproof membrane with flashing tied into the parapet, composite boards on a pedestal or sleeper system for drainage underneath, and a roof hatch or interior stair for access. Rooftop decks in historic districts also need CHAP review before the permit. Figure $20,000 to $45,000 for a complete, permitted rooftop deck.
A backyard deck typically takes one to two weeks once permits are in hand. A rooftop deck runs longer — usually two to four weeks — because of the structural work, waterproofing cure times, and additional inspections. Permit review and CHAP approval, where required, run on the front end of the schedule and should be budgeted separately from the build window, not assumed to happen overnight.
We visit the site, check the structure, and give you written pricing in 48 hours. No ballparks, no upsells.
