How to Estimate Deck and Fence Costs for a Backyard Project

Deck Cost vs Fence Cost: Key Differences

Decks are measured in square feet and include costs for the deck surface, framing, joists, posts, railings, and stairs. Fences are measured in linear feet and include posts, panels or pickets, and gates. Decks generally cost more per square foot than fences per linear foot because of the structural framing, joists, and footings required to support weight. A deck is a structure people walk on; a fence is a vertical barrier.

Square Footage vs Linear Feet

Decks use square footage for the surface area. Measure the length times the width of the deck surface. Fences use linear feet for the total length along the property line or fence run. For the same budget, a fence typically covers more ground than a deck because it does not require the same structural depth. Use our Linear Feet Calculator to measure fence runs, railing sections, and deck perimeter accurately.

Deck Material Options

Pressure-treated wood is the most popular deck material at $15-25 per sq ft installed. Cedar and redwood cost $20-35 per sq ft. Composite decking ranges from $25-45 per sq ft and PVC from $30-50 per sq ft. Hardwood like ipe can cost $35-55 per sq ft installed. The choice affects not just upfront cost but long-term maintenance — wood needs staining every 2-3 years, while composite and PVC need only annual cleaning. Use our Deck Boards Calculator to estimate the number of deck boards needed for your dimensions.

Fence Material Options

Wood privacy fences run $15-30 per linear ft. Chain link is the most affordable at $10-20 per linear ft. Vinyl ranges from $20-35 per linear ft. Aluminum and wrought iron cost $25-45 per linear ft. Composite fencing starts at $30-50 per linear ft. For fence post spacing, standard is 6-8 ft on center for wood fences and 6-8 ft for vinyl. Use our Fence Cost Calculator to get a detailed estimate including posts, panels, and gates for your fence length.

Hardware, Fasteners, and Connectors

Hardware is a small line item that is easy to overlook but essential for safety and code compliance. Deck hardware includes joist hangers, hurricane ties, post anchors, lag screws, and deck screws. Fence hardware includes gate hinges, gate latches, post caps, and tension wire for chain link. Budget $100-300 for deck hardware and $50-200 for fence hardware depending on size. Use galvanized or stainless steel hardware for outdoor durability — standard steel rusts within 1-2 years.

Railings, Stairs, and Gates

Railings add $20-50 per linear ft depending on material (wood, composite, aluminum, or cable). A standard set of deck stairs costs $500-1,500 depending on height, width, and materials. Fence gates add $150-500 each depending on width and material. These add-ons can increase total project cost by 20-40%. For a 12x12 deck, railing alone can cost $1,000-2,000. For a 100 linear ft fence with two gates, the gates add $300-1,000.

Concrete Footings and Posts

Deck footings and fence posts typically require concrete. A standard 10-inch diameter footing costs $10-20 in materials per post. Deck footings need to extend below the frost line in cold climates (typically 36-48 inches deep). Fence posts usually need 24-30 inches of depth for a 6 ft tall fence. Use our Concrete Calculator to estimate the number of 60-lb or 80-lb bags needed for your footing layout.

Lumber Costs and Grading

Lumber prices fluctuate seasonally and by region. Pressure-treated lumber is graded #1, #2, or #3 — use #2 or better for structural framing. Cedar and redwood are naturally rot-resistant but cost 30-50% more than pressure-treated. Use our Lumber Cost Calculator to estimate board feet and total lumber cost for your project. For stairs, use our Stair Calculator to calculate tread and riser dimensions, stringer length, and number of stringers needed.

Permits, HOA, and Local Code

Both decks and fences often require permits. Deck permits are more common for elevated decks over 30 inches above grade — these require structural inspections. Fence permits typically have height limits (usually 6 ft in backyards, 4 ft in front yards) and setback requirements from property lines. Check with your local building department and HOA before ordering materials. Failing to obtain a permit can result in fines, removal orders, and complications when selling your home.