How Much Does It Cost to Build a Deck in Baltimore, MD? [2025 Data]

Rooftop decks are a common sight in Baltimore, where a relatively mild climate most of the year makes outdoor living space appealing for many residents. The cost to build a deck in Baltimore is $9,986 on average, though you may pay anywhere from $5,443 to $14,528, depending on where you build the deck and what material you use.

Deck Building Cost Factors

The cost to build a deck in Baltimore, MD, varies depending on its size, location, and material.

Size

Most new decks built in Baltimore cost $20 to $60 per square foot. The higher end of that range represents deck projects built on second stories, building a deck with high-end wood, or customized designs. See the table below for general estimates based on the size of your deck:

Material

Your chosen deck material will make up a large portion of your total budget, ranging from $2 to $45 per square foot. Less-expensive materials can be tempting, but they may result in extra expenses for maintenance and repair, which you’ll need to hire a local deck contractor to handle. 

Here’s a breakdown of the materials and their costs:

• Pressure-treated wood costs $2 to $5 per square foot 

• Composite deck materials cost $12 to $22 per square foot 

• Ipe wood decking costs $10 to $20 per square foot 

• Tigerwood costs about $7 to $15 per square foot

• Mahogany costs $8 to $11 per square foot 

• Redwood decking costs $5 and $35 per square foot

• Bamboo decking costs $3 to $10 per square foot

• Cedar decking costs $3 to $7 per square foot 

Metal or aluminum decking costs $15 to $20 per square foot

Deck Type

Simply put, the more complex your deck build is, the more it will cost. Types of decks like wraparound, multi-tier, and rooftop decks require greater accessibility, additional prep work, and often more materials. Rooftop decks are particularly popular in Baltimore, where densely constructed urban homes often lack sufficient yard space or views for a ground-level deck.

For example, if you want to build a floating deck, it will likely cost about $20 to $60 per square foot. These decks don’t actually float—they’re just not attached to your home. Because of this, they’ll need a few more support posts to keep them structurally sound.

Deck Height

The type of deck you build will likely go hand in hand with where it’s installed. A second-story deck (which some contractors might deem a balcony) costs more to build because it’s harder to install. One of the most common places to install a deck in Baltimore is on the roof with access through the home's top story. These decks cost significantly more than first-story decks.

Here’s one example of how the cost average might differ:

• 10x10 first-story deck: $2,000–$4,000

• 10x10 second-story or rooftop deck: $4,000–$6,000

Framing

Framing a deck, which ensures the unit's joints are structurally safe and sound, costs $9 to $12 per square foot for labor. The lumber or materials needed to frame your deck account for about one-third of the lumber you’ll need.

Flooring

Some homeowners choose to install flooring over a wood deck. Composite is a good material option, while more elegant choices like porcelain or ceramic could add thousands (or tens of thousands, depending on the deck’s size) to your price tag. The average cost ranges from $20 to $45 per square foot, depending on the material. 

Add-Ons

Here are some other costs you might incur if you upgrade from a simple deck build:

• Staircase cost: $25–$50 per stair

• Electricity cost: $130–$300 per outdoor outlet

• Outdoor lighting fixtures cost: $50–$500

• Heaters cost: $100–$300

• Outdoor misting system cost: $2,100–$3,400

• Sofa, chairs, and table cost: $500+

• Outdoor fireplace cost: $1,500–$8,000

• Retractable deck awning cost: $600–$3,500

• Pergola or shade structure cost: $2,800–$3,200

• Deck stain or finish cost: $2–$3 per square foot

Deck Pro Costs

In the city of Baltimore, you’ll always need a permit to build a deck on your house. You’ll usually pay a $150 permit application fee plus a minimum $250 permit fee. Be sure to confirm with your deck-building contractor whether or not they will obtain the permit for you.

For a rooftop deck, you’ll need signed and sealed plans created by a professional architect or engineer with a Maryland license. Hire a licensed Baltimore deck pro to follow the plans closely during construction.

Outside of the city, Baltimore County has its own set of deck regulations. If you live in Baltimore County, you’ll need a permit if your deck meets any of the following criteria:

• Is more than 16 inches above the lowest grade

• Exceeds 120 square feet

• Is in a proposed or designated Baltimore County Historic District

• Is on the Baltimore County Landmarks List

• Is located in the floodplain

• Is located in the Chesapeake Bay Critical Area

Does Building a Deck Increase Home Value?

Building a deck in Baltimore may offer some return on your investment (ROI), but not a significant amount. A rooftop deck on a Baltimore home commonly provides a 10% to 20% ROI. Rooftop decks are less common in the northern part of the city, where larger homes don’t require as much additional outdoor space.

ROI is more likely if your deck provides certain features that potential homebuyers may value. These include electrical and water hookups that make outdoor living and cleaning easier, or a particularly good view of the city or harbor.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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