Name the use and what may change
Write down what will sit on the slab, where people or equipment will enter, and whether anything will be anchored to it. Include future plans such as enclosing a shed, adding machinery or putting up a cover. A pad priced for today’s light use is not proof that a later structure will be supported.
Separate a simple outdoor surface from a slab that forms part of a building. Tell the contractor about posts, walls, utilities and equipment loads. Ask who determines thickness, reinforcement, footings and anchoring for the intended use. This page supplies none of those design details. A patio planning guide may fit a sitting area better than a structural project brief.
Measure the shape without guessing the design
Make a rough sketch with length, width and any cutouts. Mark steps, doors, gates, drains and existing concrete. Show which dimensions are measured and which are estimates. Do not count a thickened edge as ordinary slab area if the design calls for a different section.
The concrete volume calculator converts your dimensions and supplied thickness into cubic yards. It cannot choose the thickness or tell you how much excavation is needed. Ask the contractor to confirm the shape, levels and quantity before ordering. Calculate separate sections separately when their depths differ, then discuss the complete order with the supplier.
Check access before the delivery plan
Measure the clear route to the work, including gate openings, turns and overhead obstructions that you can see safely from the ground. Explain whether trucks can reach the pad or whether concrete must travel farther across the property. Ask whether pumping, smaller equipment or extra handling is part of the estimate.
Keep household access separate from equipment access. Plan for pets, deliveries and anyone who needs a step-free route. Ask who protects paving, planting and walls along the delivery path. Do not assume the crew can drive over a drain, lid or existing slab without checking its suitability.
Separate removal, excavation and base work
If an old slab must go, have the proposal mark the removal boundary and identify hauling and disposal. Read the removal scope guide before treating “site preparation” as a complete description. Hidden thickness, reinforcement and buried services can change the method and price.
Ask what the contractor will check when the ground is exposed. Caliche, loose fill, wet ground and signs of movement need different questions; a Phoenix address does not establish which is present. The Arizona Geological Survey’s problem-soils page gives background, not a soil report for your parcel. Ask who decides whether a specialist assessment is needed.
Before ground disturbance, agree who arranges utility locating and confirms responses. Arizona’s call-before-you-dig guidance points to the official locating process. Ask separately about privately owned irrigation, lighting and other services; do not assume every buried line has been identified.
Plan the levels and where water goes
Show the contractor existing puddles, irrigation, roof runoff and nearby thresholds. Ask where water will leave the finished slab and how its edges meet surrounding ground. A pad that is flat enough for its intended use still needs a site-specific drainage plan.
Do not raise a surface simply to hide settlement without checking nearby doors, walls and drainage. Ask whether the work changes runoff toward a neighbor or a public route. Have the responsible contractor or designer show the planned levels before excavation begins.
Check approvals for the whole project
Give the city the address and intended use, including any shed, electrical service, posts or future enclosure. Do not describe only a “small pad” if it supports a larger project. Our Phoenix permit checklist separates private-property work from public connections and explains what to ask.
HOA permission is another check where it applies. It does not replace city approval. Keep written answers with the sketch so the contractor prices the same project the city reviewed. Ask who obtains approvals, schedules inspections and pays for any required plan changes.
Compare the full scope and handover
Ask the written quote to cover dimensions, approved design details, ground preparation, finish, joints, delivery, protection, cleanup and exclusions. Identify any allowances and the process for approving a change after excavation. Use the quote comparison worksheet to spot missing terms rather than rank contractors.
Discuss the hot-weather plan, including who maintains curing protection and what delays the pour. Get separate instructions for walking, placing equipment and installing anchors. Review the cost guide for rate definitions, and check how this service works before an optional contractor contact request. No request promises a match or a construction price.