Concrete driveways in King City
A driveway on the Oak Ridges Moraine carries a consideration that does not apply in a serviced subdivision: what the ground underneath it is for.
The moraine is a recharge area, the place where surface water enters the aquifer that supplies much of this region, and the provincial conservation plan exists to protect that function. Impervious surface works against it. That does not mean a King City property cannot have a proper driveway, but it does mean the total hard surface on a lot is looked at through a groundwater lens as well as through the Township's zoning by-law, and a very large paved area gets more scrutiny here than the same area would somewhere else. It also makes the drainage design part of the argument rather than an afterthought: water directed to where it can infiltrate is a better answer than water shed straight to a ditch.
The physical constraints are the ones every unserviced property shares. Nothing gets poured over the septic bed or its designated replacement area, and construction traffic should not be compacting either of them on the way through. The well head and its protection radius are out as well, both for the slab and for any regrading that would route surface water toward it, because that is a contamination path rather than an inconvenience. Locating both is the first site visit, and on a long approach it frequently changes the route.
Once the route is set, length drives the specification. A drive carrying trucks, trailers or equipment gets six inches over a properly compacted granular base, against four inches for cars on a shorter run. Base compaction in lifts is what prevents differential settlement through a freeze-thaw winter, and on a long approach the drainage has to be designed rather than assumed: cross-fall, interception partway along instead of letting the whole run collect, and a discharge point chosen deliberately.
Access is a genuine planning item out here. Concrete trucks need a route in and a place to stand, and on a wet rural site that has to be worked out before the day rather than improvised on it.
Control joints cut at the correct spacing for the thickness put the inevitable cracking in a planned line. We also pour the patios and pool decks that get scheduled alongside, and cover the rest of our King City service area.
South of here the constraint is lot coverage on a tight frontage rather than groundwater, covered on concrete driveways in Vaughan. West the approaches are longer again with escarpment approvals in play, dealt with on concrete driveway cost in Caledon.