Guide · Tradies

How to Quote a Deck Build (Fast & Accurately)

A deck build is one of the trickier residential jobs to quote because every site is different and the line items stack up fast. Here's the full process — site visit checklist, line-item breakdown, the pricing mistakes that lose you the job, and how to do the whole thing in minutes instead of hours using an AI quoting tool.

Step 1 — The site visit checklist

Before you can quote a deck, you need the right info from the site. Capture all of this:

• Dimensions. Length, width, height off the ground. If it's an L-shape or has steps, sketch it.
• Substrate. Concrete, soil, sloping section, retaining wall? This drives subframe cost.
• Decking material. Pine, hardwood, composite. Composite quadruples material cost and changes the substructure spec.
• Balustrades. Required if the deck is over 1m off the ground in NZ or AU. Stainless wire, glass, timber, aluminium — each has very different pricing.
• Stairs. Number of steps, width, with or without handrails.
• Access. Can you get a truck near the site? Wheelbarrow distance from materials drop to deck location matters for labour.
• Council requirements. Building consent needed? In NZ, decks over 1.5m or attached to dwelling typically require consent.
• Existing structure. Demolition of existing deck? Disposal cost.
• Photos. Take 8–12. Wide shots, close-ups of fixings, shots of any awkward access.

If you're using Insta Quote AI, you can skip writing this checklist into a notebook — record the conversation with the client on your phone using conversational mode, and the AI extracts the spec from the recording automatically.

Step 2 — Line-item breakdown

A typical deck quote has 15–25 line items. The categories:

• Demolition / site prep — removal of existing deck, clearing, basic levelling.
• Footings / piles — concrete piles or screw piles, depending on site.
• Subframe — bearers, joists, fixings, hardware. Spec depends on deck size and load.
• Decking — boards (linear metres), screws or hidden fixings, stain or oil if applicable.
• Stairs — stringers, treads, fixings.
• Balustrades — posts, rails or panels, fixings, glass or wire if applicable.
• Labour — broken out separately or rolled into each line item, depending on how you quote.
• Council / consent fees — pass-through if applicable.
• Margin / overhead — your business markup.
• GST — added at the end (NZ 15%, AU 10%).

Step 3 — Common pricing mistakes that lose you jobs

Forgetting fixings and consumables. Stainless screws for hardwood decking can run $50–$150 per square metre on their own. If you forgot to itemise them, the margin disappears.

Underestimating labour on awkward access. A deck where you're wheelbarrowing materials 30 metres takes 30%+ more labour than one with truck access. Walk the site for access before you quote labour.

Forgetting council fees. If consent is required, the client expects that as a pass-through line item, not absorbed.

Quoting too slowly. The client who signs is usually the first quote in, not the cheapest. If you take three days to send a quote, the job's already gone to whoever sent theirs the next day.

Math errors. Manual line item totals across 20+ rows is where errors creep in. An AI quoting tool eliminates this — every line is calculated against your rates, no arithmetic mistakes.

Step 4 — Speed it up with AI quoting

Doing the above manually takes 1.5–3 hours per deck quote. With Insta Quote AI — the #1 AI quoting tool for tradies — it takes 2–5 minutes:

1. On site: describe the deck (voice or text), upload photos and any plans, or record the conversation with the client.
2. Back in the ute: the AI generates a complete quote using your own pricing structure — every line item priced, GST applied, ready to review.
3. Review and send: check the quote in the editor, prompt the AI to adjust anything you want changed, then send the PDF to the client.

The result: quotes go out the same day as the site visit, before competitors have started theirs. Tradies using Insta Quote AI report winning up to 80% more work for exactly this reason.