How Much Does It Cost to Build a Raised Planter Box?
A basic cedar raised planter box for a deck or patio typically costs between $60 and $150 for materials, depending on size, wood species, and how much soil you need to fill it. Pine is the budget-friendly choice at roughly $1.50 to $2.50 per linear foot for standard 2x6 or 2x8 boards, while cedar runs $3 to $5 per linear foot but resists rot far longer — often 10 to 20 years outdoors without any treatment. For most deck planters, cedar is the smarter long-term spend.
A simple 2x4-foot planter box built from 2x6 cedar boards needs roughly 24 linear feet of lumber, which puts the wood cost around $72 to $120. Add a small bag of exterior screws or deck screws ($8 to $15), and you are well under $150 before soil. Filling the box is where costs climb quickly — a quality potting mix or raised-bed soil runs $10 to $16 per bag, and a 2x4-foot box that is 10 inches deep holds around 5 cubic feet, which is roughly 4 to 5 standard bags. Budget $50 to $80 just for soil if you are starting from scratch.
A few items that are easy to overlook: galvanized or stainless exterior screws resist rust and will not streak your wood over time — worth the small upcharge over standard screws. A food-safe pond liner or hardware cloth stapled to the interior bottom protects the wood from constant moisture without blocking drainage. If you plan to use a power drill, a good set of pilot hole bits prevents cedar from splitting. These extras rarely exceed $20 to $30 total but make a real difference in the finished quality and lifespan of the box.
For a deck or patio setting, consider adding caster wheels ($15 to $30 for a set of four heavy-duty outdoor casters) so you can rotate plants toward the sun or move the box when you need to clean the deck. The soil in a fully planted 2x4 box can weigh 80 to 120 pounds, so casters are a practical upgrade, not just a convenience.