Sink & Faucet Installation in Mount Prospect, IL

That is the Village of Mount Prospect Community Development Department — Building Division's call, not ours — (847) 870-5675. The general shape of it is that cosmetic work is usually outside permit scope and anything that adds or moves electrical, plumbing or gas usually is not. Where Mount Prospect publishes a rule we follow it; where it does not, we say so in the quote rather than assuming an exemption on your behalf.

Usually yes, with real modification: the horizontal rail above the door opening comes out, the doors get shortened, and the cabinet gets a reinforced sub-frame because fireclay and cast iron apron sinks weigh 100-200 lb before water. Budget several hundred dollars for that cabinet work on top of the sink itself, and expect the whole farmhouse install to land in the $700-$2,200 range. As a sizing rule, a 33 in apron sink is the practical maximum for a standard 36 in sink base.

Sometimes, but the trades treat it as a gamble: an existing undermount is bonded to the old slab and can be damaged during demolition, and the new cutout must then match a sink that may be discolored, scratched, or slightly out of square. Drop-ins survive reuse much better. Since new fabrication is the cheapest moment to set a sink and decent stainless bowls start around $100-$300, most homeowners come out ahead putting a new sink under new stone - reuse mainly makes sense for a recently purchased or premium sink in verified good condition.

A properly installed undermount is held by mechanical clips or anchors plus silicone - not adhesive alone - and does not simply fall. The failures you read about almost always trace to caulk-only installs or a heavy cast iron bowl hung without support brackets. Ask your installer what physically carries the load, and do not store heavy items pressing on the bowl. If a sink ever starts to sag or the rim seam opens, water is reaching the seam and the cabinet below - have it re-supported promptly, not just re-caulked.

In Illinois, yes - the state Plumbing License Law reserves plumbing work, including alterations, to licensed plumbers, and suburbs commonly require a licensed plumber letter of intent with kitchen permits. Wisconsin likewise requires licensed plumbers for plumbing scopes, though the City of Milwaukee lets homeowners pull plumbing permits for their own home. Indiana licenses plumbers statewide but enforcement on small fixture swaps varies by locality. Many countertop installers include a plumber reconnect in the price - confirm that line item in the quote rather than assuming.