Step one: find out when your house was built
Houses in a single neighborhood can be built across different years, and renovations muddy the picture further. The simplest ways to confirm your home's age:
- Look up the property on your county's assessor or property-records website. Naperville spans both DuPage and Will counties, so check the one that covers your address.
- Look at your closing documents or inspection report from when you bought.
- Check the date stamp on the toilet tank lid and any stamps on the water heater. They give a rough idea of when the fixtures were installed, which may be later than the house itself.
Once you have the year, use the guide below. It describes general patterns across American houses by era, not specifics about any street in Knoch Knolls.
What each building era tends to mean for a bathroom
| If built… | Things providers often check |
|---|---|
| Before 1978 | Lead-based paint on trim and walls. Federal lead-safe rules apply to paid renovation work in these homes. Older flooring and adhesives may contain asbestos and should be tested before being disturbed. |
| Roughly 1960s to 1970s | Cast iron or early plastic drain lines, copper supply lines and small original bathrooms. Original tubs may be steel or fiberglass. |
| Roughly late 1970s to mid-1990s | Some homes built in this period used polybutylene supply pipe, a gray or blue plastic that has a history of failures. If you see it, ask a plumber about replacement. Many baths have one-piece fiberglass tub-shower units. |
| Roughly mid-1990s to 2000s | Builder-grade fixtures, hollow-core doors, drywall with moisture damage near tub-shower units and sometimes undersized exhaust fans. |
| 2010s and newer | Generally modern plumbing and wiring. Remodels focus on layout, finishes and storage rather than replacing old systems. |
These are general patterns. Individual homes vary, and an on-site inspection is the only way to know what's in yours.
Match the project to the age
Older homes: budget for what you can't see
If your home is from the earlier decades in the table, a provider will likely want to open a wall or lift the floor before giving a firm price. That's responsible, not stalling. Allow some contingency, and read about tile installation and waterproofing so you know what good looks like. If you suspect lead paint, ask providers whether they're EPA lead-safe certified; the EPA's lead-safe renovation rules explain the requirements.
Mid-era homes: look at the plumbing
If your supply lines might be polybutylene, a bathroom remodel is an opportunity to replace them while walls are open. A licensed plumbing contractor can identify the pipe and advise. It's also a good time to evaluate whether a new vanity and shutoff valves would help, because original stops can fail when disturbed.
Newer homes: spend on layout and storage
Systems are usually fine, so the budget can go to the parts you'll notice: a bigger shower, a better vanity, tile you chose rather than the builder's, and better lighting and ventilation. If a bigger shower is the goal, see shower remodeling.
Permits and licensed trades in Naperville
When a bathroom project involves plumbing or electrical work, the city expects a residential alteration permit, drawings of the scope of work and licensed trades: a State of Illinois plumbing license for the plumbing contractor, and electricians registered with the city. Cosmetic changes alone usually don't need a permit. The City of Naperville residential alteration guidance is the place to check. If you're still deciding what to do, our main page on bathroom remodeling in Naperville explains the referral process.
When you call us, mention the year your home was built if you know it. It helps us connect you with a provider who has handled homes of that era.
