How to Design a Bathroom Renovation

Designing a bathroom renovation is really about making a series of decisions in the right order, before anyone picks up a hammer. Homeowners often come to us with a Pinterest board full of finishes but haven't thought through layout, plumbing locations, or how the space needs to function for their household. That's where projects run into trouble - and where budgets get blown. Here's the process we walk clients through, based on nearly three decades of remodeling bathrooms in North Shore homes.

Start With How You Actually Use the Space

Before layout or tile, think through daily use. Is this a primary bath two people get ready in at the same time, a guest bath, or a kids' bath that needs to hold up to towels on the floor and toothpaste everywhere? Do you want a soaking tub, or would you rather have a bigger shower and skip the tub entirely? Aging-in-place features - a curbless shower, grab bar blocking, a taller toilet - are worth discussing even if you don't need them yet, since it's far cheaper to build them in now than retrofit later.

This is also the point to set a realistic budget range. Bathroom renovations vary widely depending on scope, finishes, and whether you're moving plumbing, so rather than throwing out a number here, we'd point you to our remodeling cost guide for general ballparks, and encourage a walkthrough for a firm quote on your specific space.

Understand What You're Working With

A lot of North Shore housing stock - Highland Park, Glencoe, Winnetka, Wilmette, Evanston in particular - was built between the 1920s and 1960s, with a fair number of newer homes in Lincolnshire, Vernon Hills, and Buffalo Grove mixed in. Older homes often have plaster walls instead of drywall, cast iron drain lines, galvanized supply lines, and bathrooms sized for fixtures that are decades old by today's standards. Some have horsehair plaster or balloon framing that changes how we run new wiring and plumbing.

Before any design gets locked in, we open up walls and floors to see what's actually there - old shutoff valves, undersized vent stacks, or floor joists that don't line up with where you want a new tub. This step matters more on an older North Shore home than almost anywhere else, because surprises are common and they affect what's feasible.

Nail Down the Layout Before Anything Else

Layout drives everything - cost, timeline, and how the finished room will feel. A few questions we walk through with clients:

• Can existing plumbing stay roughly in place, or does the layout call for relocating the tub, shower, or toilet? Moving fixtures away from existing drain lines adds cost and, in older homes, sometimes means dealing with concrete slabs or joist notching.
• Is there room to widen a doorway or reconfigure a closet to gain a few extra square feet? In many older North Shore baths, borrowing 6-12 inches from an adjacent closet can be the difference between a cramped shower and a comfortable one.
• Where does ventilation go? Illinois winters mean humidity and condensation are real issues; a properly sized and vented exhaust fan isn't optional, especially in a bathroom with a shower and no operable window.
• Natural light and window placement - can an existing window stay, or does it need to move for the new layout?

We usually sketch two or three layout options before settling on finishes, because it's much easier to adjust a floor plan on paper than after tile is set.

Then Move to Finishes and Fixtures

Once the layout works, finishes become a more enjoyable, lower-stakes decision. A few practical notes from what we see go right and wrong:

• Tile: Large-format tile on floors means fewer grout lines to clean but requires a flatter subfloor - something we assess during demo. In showers, a linear drain often gives more design flexibility than a center drain.
• Ventilation and heat: Radiant floor heat is popular in North Shore baths for a reason - Chicago winters make cold tile floors unpleasant, and it's much easier to add during a full renovation than later.
• Vanities and storage: Custom or semi-custom vanities let you use awkward dimensions in older homes more efficiently than stock cabinetry.
• Lighting: Layer it - vanity lighting at face height, general ceiling light, and if there's a soaking tub or freestanding tub, a dedicated fixture above it.

Permitting and Timing

Every North Shore suburb - Highland Park, Winnetka, Glencoe, Lake Forest, Deerfield, and the rest - has its own village building department, and requirements can differ from one town to the next even though the homes look similar. A bathroom renovation that involves moving plumbing, electrical work, or structural changes generally requires a permit, and older homes sometimes trigger additional scrutiny once walls are opened up. Part of what we handle as general contractor is pulling the right permits and coordinating inspections, so you're not the one tracking down village requirements.

On timing: many homeowners assume spring is the busy season, but bathroom projects work well in winter too, since they're interior work and not weather-dependent the way additions or exterior projects are. If you're hoping for a completed bath before hosting holiday guests, or before a specific date, plan the design phase several months out - lead times on custom vanities, tile, and certain fixtures have been running longer than they used to.

Bringing It Together

A good bathroom design happens in this order: function and budget, then existing conditions, then layout, then finishes. Skipping ahead to finishes before the layout is settled is the most common reason projects go over budget or timeline. Working with a contractor who has in-house trades - carpentry, plumbing coordination, tile - also means fewer handoffs and one point of contact who's accountable for how the pieces fit together. You can see examples of finished bathrooms and full home projects on our projects page, and our bathroom remodeling page has more detail on our process and typical scope of work.

Considering a remodel on Chicago's North Shore? Reach out to J.P. Construction to talk through your project and get a free estimate.