A cosmetic refresh, meaning new countertops, backsplash, hardware, paint, and flooring while keeping the existing layout and cabinet boxes, generally runs $15,000 to $35,000. A mid-range full remodel with new cabinets, counters, appliances, lighting, and flooring runs $35,000 to $75,000. A high-end remodel, or one that changes the layout, runs $75,000 to $130,000 or more.
The single biggest driver is whether the layout changes. Replacing a sink where a sink already is costs a fraction of moving it across the room, because moving plumbing, gas, and electrical means opening floors and walls and reworking what is behind them. Cabinetry is the next largest line item and has the widest range, since stock, semi-custom, and full custom differ by multiples. After that come countertop material, appliance tier, and whatever the demolition uncovers, which in a Worcester County home built before 1960 is often knob and tube wiring, undersized electrical service, or plumbing that should have been replaced two owners ago.