Planning a Renovation? Don’t Forget the Plumbing

What plumbing homeowners often overlook during a renovation and how to avoid costly surprises.

Renovations are exciting. New layouts, fresh finishes, and the dream of finally getting the space you want. But before the drywall goes up and the cabinets arrive, there’s one thing that needs to be on your radar from day one: the plumbing.

Too often, plumbing becomes an afterthought — and that’s when timelines stretch, budgets blow up, and last-minute compromises sneak in. Here’s how to plan your reno the smart way, avoid expensive missteps, and set your project up for smooth sailing.

Start With a Plumbing Reality Check

Even the best design can fall apart if the plumbing behind it can’t support the plan. Before committing to layouts, book a licensed plumber to review:

  • The age and condition of your current pipes
  • Whether your drains can handle new fixtures
  • If the existing water lines are sized properly
  • Venting requirements for new bathrooms or kitchens
  • Whether shut-off valves need updating
  • A drain camera inspection to spot hidden issues before they become expensive surprises

A quick upfront assessment, especially a camera inspection, can save you weeks of delays later.

Why a Drain Camera Inspection Matters

A drain camera inspection gives you a clear look at what’s happening inside your pipes, something no amount of guessing can replace. It helps identify:

  • Tree root intrusions
  • Blockages or buildup
  • Cracked or collapsed pipes
  • Improper drain slope
  • Old piping that needs replacement

Catching these issues before the renovation starts prevents unexpected costs, wall openings, and delays once the project is underway.

Know What Counts as a “Plumbing Move”

Thinking of relocating a sink? Adding a basement bathroom? Moving your laundry upstairs? All of these involve rerouting water and drain lines and those changes need planning, permits, and inspections.

Plumbing moves aren’t deal-breakers, but they’re not as simple as sliding a vanity down the wall. Your plumber can help you understand:

  • What can stay where it is
  • What can be moved
  • What’s not feasible (or not worth the cost)

A bit of strategy early on keeps your layout functional and budget-friendly.

Don’t Forget About Venting & Drain Slope

Two things homeowners rarely think about but matter a lot:

Venting
 Every fixture needs proper air flow to drain correctly and prevent sewer smells. Poor venting is one of the most common reno mistakes, and it often requires opening finished walls to fix.

Drain slope
 Drains must be installed at a specific slope to move wastewater efficiently. This affects how low vanities can be, where showers can go, and how far toilets can be moved.

Both are small details that have big consequences if overlooked.

Choose Fixtures Before Rough-In

Your plumber can’t rough in piping without knowing the exact dimensions and requirements of your fixtures. That includes:

  • Shower systems
  • Toilets
  • Freestanding tubs
  • Kitchen faucets
  • Undermount vs. farmhouse sinks
  • Laundry appliances

Choosing these early keeps the project moving and avoids re-doing work.

Add Shut-Off Valves to Your Checklist

Renovations are the perfect time to update or install new shut-off valves. They make future repairs easier and help prevent water damage if a fixture ever fails.

They’re inexpensive, quick to install, and worth every penny.

Build Your Budget With Plumbing in Mind

Plumbing is often 10–15% of a major renovation budget, depending on:

  • The number of fixtures
  • Whether anything is being moved
  • Material upgrades (PEX, copper, drain piping)
  • Permits and inspections

Knowing this early means fewer surprises and better planning overall.

Work With a Licensed Plumber From the Start

Your contractor handles a lot, but plumbing needs a licensed expert. Bringing a plumber into the planning phase ensures your designs, timelines, and expectations all line up.

A licensed plumber will help you:

  • Flag issues before demolition
  • Provide accurate quotes
  • Coordinate with designers and contractors
  • Deliver work that meets Ontario plumbing code
  • Make sure everything is inspected and signed off properly

It’s the behind-the-scenes work that protects your investment.

Good Plumbing Makes Great Renovations

A well-planned plumbing system is the quiet hero of every successful renovation. When it’s done right, everything works the way it should and you don’t think about it again.

If you’re gearing up for a 2025 project and want expert plumbing guidance from the start, our licensed Trouble Shooters team is always here to help. Contact our team today.