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Standalone planning workspace

Deck & Handrail Planner

Continue to Handrail Planner
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Preliminary planning only. This tool is not an engineered design, permit or approval. Material prices are based on the Home Depot price list's last-updated date and may have changed since then.
Step 1 of 4

Tell us where you’re building

This identifies the authority that may review your permit and the structural dataset the planner must use.

How will the deck be supported at the house?
Step 2 of 4

Set the deck footprint

Enter outside framing dimensions. The live plan updates as you type.

Deck shape
Where is the house on your plan?

Imagine looking straight down from above. The dark bar is the house wall; the pale rectangle is your deck.

Where is the exterior door?
Choose the stair attachment
Is there a separate opening through the deck floor?
Step 3 of 4

Choose materials and flag special conditions

You do not need to calculate spans or load widths. The planner handles those internally.

Does the deck support any of these?

Select all that apply. These conditions stop automatic structural output.

Step 4 of 4

Review what you entered

Check the plan and acknowledge the limitations before calculating.

Project result

Your preliminary framing preview

Free preliminary estimating tool

Estimate deck and handrail materials before you build

This free planner helps homeowners, do-it-yourself builders and contractors create a rough residential deck material estimate online. Enter your deck dimensions to review preliminary framing, lumber quantities, stair layout and material pricing, then carry the same plan into the handrail estimator without entering the deck again.

What the deck calculator estimates

Plan a rectangular or L-shaped deck, attached or freestanding framing, joists, beams, posts, decking, stairs and downloadable material reports.

What the railing calculator estimates

Compare aluminum, pressure-treated wood, wood with metal pickets and request-only glass, cable or cedar railing options, including stair rails and mounting hardware.

How to use the cost result

Use the result as an early material-budget guide. Prices reflect the list's recorded update date and may change. Labour, permits, foundations and site-specific engineering require separate review.