Hiring a Contractor for a Driveway Extension: Quotes and Red Flags

The material and its spec — 5-inch concrete with rebar, 2–3 inches of hot-mix on a 6-inch base, or vehicular pavers on 6 inches of compacted stone with edge restraint and polymeric sand; the excavation depth and where the soil goes; base material and compaction; the tie-in method at the existing driveway (expansion joint and dowels, saw-cut and tack coat, or restraint); the pitch and any drainage; any curb, apron or right-of-way work; the finish; sealer if included; the permit and HOA submission; and a warranty. Get three on the same spec.

It depends on the material. Concrete: a flatwork or concrete contractor. Asphalt: a paving company — they own the paver and roller and buy from the plant. Pavers and gravel: a hardscape or landscape contractor, ideally one with ICPI-certified installers for pavers. Driveway 'extension specialists' are usually one of these trades under a marketing name. Avoid a general handyman for anything cars will park on; the base is where inexperience shows.

One to two days for a 200 sq ft strip in any material, plus curing: concrete keeps cars off for 7 days, asphalt for 2–3 days (longer in heat), pavers can be driven on once the joint sand has set — usually the next day. Gravel is done when it's compacted. Add a few days to a couple of weeks up front for the permit and HOA approval, which the contractor should build into the schedule.

Late spring through early fall for concrete and asphalt — both need ground above about 40–50°F and a dry day; asphalt plants close in winter in the north. Pavers and gravel go in any time the ground isn't frozen. Contractors are least booked in early spring and late fall; if you can accept a shorter cure window, those are cheaper weeks.

They should, and the quote should say so. Where the city limits impervious cover or driveway width, the contractor submits a site plan; where the extension touches the sidewalk, curb or apron, they pull the right-of-way permit and often have to use a bonded contractor for that part. HOA approval usually has to come from you as the owner, with the contractor's drawing attached. A contractor who says extensions never need a permit hasn't checked your jurisdiction.

A price per square foot with no base depth; 'four inches' of concrete for a parking strip; no mention of compaction; a plan to lay pavers on sand over soil; asphalt quoted without a saw-cut edge at the old surface; no answer on where the water goes; no permit; a demand for full payment before the pour or before the cure; and a quote given without walking the site. Also the door-knocking crew with 'leftover asphalt' from another job — that's a scam, not a bargain.

One to three years on workmanship for concrete (cracking beyond hairline, settling, scaling), two to five for pavers (settling, shifting, joint failure), one to two for asphalt (raveling, settling, edge failure). Manufacturers warrant pavers themselves, often for life, when installed to their spec by a certified installer. Get the spec and the warranty in the same document so a claim has something to point to.