Kitchen and Bathroom Plumbing Upgrades for Modern Homes

Published June 5, 2024 · Mountain Grove Plumbing & Drains

Kitchen and bathroom renovations are among the most common projects in Burlington homes, and plumbing is almost always involved. Whether you're doing a full gut renovation or targeted upgrades, the plumbing decisions you make now will affect how the space works for years. This guide covers the most common upgrades, what they involve, and where to invest versus where to save.

Kitchen Plumbing Upgrades

Faucet and Fixture Replacement

Kitchen faucets take more punishment than any other fixture in the house — daily use, temperature cycling, and hard water all shorten their lifespan. Builder-grade faucets installed in Burlington homes from the 1990s and 2000s are now reaching end of life. Upgrading to a quality mid-range faucet (Moen, Delta, Kohler) typically costs $300–$600 installed and delivers notably better performance and durability. Pull-down spray faucets are the current standard for functionality.

Under-Sink Filtration

Reverse osmosis filtration systems installed under the kitchen sink provide drinking water significantly better than Burlington municipal water alone. Installation involves a separate small faucet at the sink, a connection to the cold water supply, and a drain connection — a 2–3 hour job for a plumber. System quality varies widely; mid-range systems from APEC or Waterdrop are reliable. Filter cartridges need replacement annually.

Dishwasher Supply and Drain

If you're moving the dishwasher or adding one, the supply line (hot water), drain connection, and electrical all need to be properly located. A common installation error is connecting the dishwasher drain to the wrong location — it needs to drain high before dropping to the disposal or p-trap to prevent backflow. Always use a plumber for dishwasher rough-in during a renovation.

Kitchen Island Plumbing

Adding a kitchen island with a sink requires supply and drain lines run under the floor — a rough-in change that affects the subfloor and needs to be planned before cabinetry goes in. Island drains often also require an air admittance valve or ceiling vent since traditional venting through the wall isn't accessible. This is a job that requires coordinating plumbing with the renovation timeline; it cannot be added easily after the fact.

Bathroom Plumbing Upgrades

Shower Systems and Valves

Replacing a single-handle shower valve with a thermostatic valve is one of the best functional upgrades in a bathroom renovation. Thermostatic valves maintain precise temperature regardless of other water use in the house — no more scalding when someone flushes a toilet. They're also required by current plumbing code for accessible showers. The valve is rough-in work done during tile installation; the trim (handle, dial) installs after tile is complete. Budget $600–$1,200 installed depending on the valve specification.

Bathtub Replacement

Replacing a standard alcove tub with a freestanding tub requires relocating the drain and potentially the supply lines — the supply connection for a freestanding tub comes up through the floor rather than through the wall. This is a significant rough-in change that needs to happen during demo. Don't plan to add a freestanding tub after tile is down — the rough-in work means opening the floor. For a standard alcove-to-alcove swap, rough-in stays the same and the job is simpler.

Toilet Upgrades

Modern dual-flush toilets use 4.8L on a full flush — less than half the water of toilets from the 1990s (13.6L). For a family home in Burlington, replacing three 1990s toilets with current dual-flush models can reduce indoor water use by 20–25%. The installation is usually straightforward as long as the rough-in (the distance from the wall to the floor drain bolt holes, typically 12 inches in North American homes) matches the new toilet specification.

Basement Bathroom Rough-In

Many Burlington homes built in the 1990s and 2000s have a roughed-in basement bathroom that was never completed. Completing a basement bathroom rough-in involves installing supply lines, drain connections, and venting for a toilet, sink, and shower — then finishing with fixtures of your choice. This is one of the best ROI renovations in Burlington real estate: adding a basement bathroom significantly increases livable space and property value at a cost far below adding above-grade square footage.

What to Coordinate with Your Plumber

Plumbing rough-in (the supply and drain work behind walls and floors) must happen before tile, drywall, and cabinetry. Finish plumbing (fixtures, faucets, toilets) happens after. The key coordination point: if you're changing any fixture locations — moving a sink, adding a shower drain, relocating a toilet — this has to be planned and communicated to your plumber before demo begins. Changes after rough-in is complete require reopening walls and floors, which adds significantly to cost and disruption.

Older Homes: What to Check First

In Burlington homes built before 1990, a bathroom renovation is also a good opportunity to assess the existing plumbing. We typically check: supply line condition (galvanized pipes corrode and should be replaced if discovered during a renovation), drain condition (cast-iron drain stacks are worth inspecting before closing walls around them), and venting adequacy (older homes sometimes have under-vented drain stacks that cause gurgling and slow drains). Discovering and fixing these during a renovation is far cheaper than doing it separately.