When you get the keys to a brand new home in the Lower Mainland, everything feels perfect. The paint is fresh, the appliances shine, and the modern fixtures look beautiful. It is easy to assume that a newly built home will be free of problems for a long time, which is hopefully the case.
However, it is possible that homeowners may see a different side of their new construction homes. With over 20 years of experience of helping our local community, our team at Pete & Son Plumbing have seen that plumbing issues in new construction homes can be a common concern.
Metro Vancouver saw 30,855 total new housing completions in 2025, according to the Canada Mortgage and Housing Corporation (CMHC). That includes 25,622 apartments in the Metro Vancouver area. That does not include the expansive growth of other cities in the Greater Vancouver Area, including Langley, Surrey, Abbotsford, Chilliwack and more. With new construction homes on the rise, it is important to be familiar with the number of reasons why plumbing issues may occur in new construction builds. Here are the most common plumbing concerns that we have seen and dealt with.
1. Construction Trash in the Drains
A wide number of different trades people work on a house before it is finished. Drywallers, painters, tile setters, and builders all work on very tight schedules. Sometimes, the trash and waste ends up down the drains of the new property.
Workers may wash drywall mud, paint, grout, or concrete down the sinks. Once these materials dry in the pipes, they form hard blocks. There have even been soda cans, wood dust, nails, and food wraps found inside main sewer lines of brand-new homes. If the new drains are slow from day one, construction debris may be the cause.
2. Cracked Pipes and Leaking Joints
Modern homes use flexible plastic pipes (commonly known as PEX) or copper pipes to carry water. These materials are very strong; however, they must be installed with care.
In the rush to build a new subdivision, workers may make quick, sloppy connections. A joint that is not sealed properly might hold water for a few days but will start to leak later under daily water pressure. In other circumstances, trades workers might hit a pipe with a screw or nail while putting up drywall. This causes a tiny, slow leak that hides behind the walls of a new construction build. The homeowner might only notice it when a water stain appears on the ceiling, which is why we recommend calling a plumbing professional at the first sign of concern.
3. Rattling, Shaky Pipes
Do you hear a shuddering, shaky, or loud bang in the wall when you turn off a tap? This sound is often referred to as a water hammer. This occurs when fast water stops suddenly, making a shockwave in the pipe.
In a well-built home, pipes are held tight to the wooden frame with plastic straps. If the builders cut corners and skipped these supports, the pipes will shake. Over time, this shaking weakens the joints. Eventually, this may lead to major water leaks.
4. Sagging Sewer Lines
One of the most concerning plumbing issues in new construction homes are sagging sewer lines. Your main sewer line runs deep underground to connect with the city sewer. Before laying this pipe, workers must pack down the soil underneath. If they do not pack down the soil sufficiently, the heavy dirt on top will make the pipe sink in those weaker spaces. This creates a low point, also known as a belly, in the sewer line.
Waste and water will pool in this dip instead of flowing away. Over a few months, paper and waste build up in the low spot. This can cause raw sewage to back up into the new home’s basement drains, which is why sagging sewer lines are a major cause for concern.
5. Wrongly Installed Fixtures and Valves
Sometimes, simple mistakes happen during construction and installation. Shower valves can be put in backwards. If this happens, the hot water tap will pour out cold water, and the cold tap will give hot water. Toilets might not be sealed right to the floor, which can cause strong odours into the bathroom. Dishwashers may have been hooked up without removing plastic caps, leading to a flood on their first run.
Why Do These Plumbing Problems Happen?
It seems baffling and strange that a brand new system could potentially have so many faults. These errors with new construction often are the result of three main causes:
- Fast Schedules: Builders are in a rush to finish homes, in which this quick pace leads to simple mistakes and missed checks.
- Low Bids: Some home builders hire plumbing crews based on the lowest price available, which may result in less skilled workers working on construction sites without proper supervision.
- Lack of Quality Testing: A quick test during construction does not always catch slow leaks or sagging underground pipes. High quality testing is more expensive and may not be completed.
How to Protect Your New Home
If you are buying a new construction home or have just moved into a new home, there are steps that homeowners can take to protect the plumbing:
- Get an Independent Plumbing Check: Do not solely trust the builder’s inspection. Hire an independent plumber to look over the whole system for the entire property.
- Request a Sewer Camera Test: The sewer camera test is the only way to see inside the home’s underground lines. The camera test will find trash, cracks, or sags before they cause a backup or further damage.
- Use Your Warranty: In British Columbia, most new homes have a home warranty. Most plumbing parts are covered for the first two years. If the homeowner finds a leak, write it down and tell the builder right away.
At Pete & Son Plumbing, our family owned business has over 20 years of experience in the Greater Vancouver Area. We have seen a number of plumbing concerns in both new construction buildings as well as older heritage homes. Whether you need a full inspection of your new home or quick drain cleaning, our team is here to help. We offer clear, friendly advice and real solutions.
