There are three ways to upgrade a staircase: refinish existing wood treads ($55–$75 per tread), convert carpeted stairs to hardwood with new treads and risers, or install a new staircase outright — that last one is always priced at an in-home estimate, because stringers, landings, and railings vary house to house. Stairs are also the most code-sensitive woodwork in your home: riser heights within a flight may vary no more than 3/8 inch, which is why precision matters more here than anywhere else.
No surface in your house takes more concentrated abuse than a staircase, and none is judged faster by guests — in thousands of local split-entry homes, the stairs are literally the first thing you see when the front door opens. We're OC Flooring, and since 2013 we've handled the stair side of flooring projects all over King and Snohomish County: refinishing worn treads, converting carpeted flights to hardwood, and building stairs to match brand-new floors. Here's how we think about stair work, what each path involves, and the safety details that separate a beautiful staircase from a liability.
Three Stair Facts Worth Knowing
the maximum difference building code allows between the tallest and shortest riser in a flight. Your feet memorize a stair rhythm within two steps — even small inconsistencies cause trips.
the tallest riser residential code permits. Steep old basement and attic stairs in pre-war homes routinely exceed it — one reason stair remodels sometimes become stair rebuilds.
the typical thickness of a solid oak stair tread — a third more wood than the flooring on your floors, because a tread spans open air instead of resting on subfloor.
The Parts of a Staircase (and Why They Matter to Your Quote)
| Part | What it is | Why it drives cost |
|---|---|---|
| Treads | The horizontal boards you step on | The wear surface — species, thickness, and finish live here |
| Risers | The vertical boards between treads | Usually painted; cheap to refresh, transformative to replace |
| Stringers | The sawtooth structure carrying everything | Hidden until demo; their condition decides repair vs rebuild |
| Nosing | The rounded front lip of each tread | Takes the most impact; landings need matching nosing pieces |
| Skirt boards | Trim running along the wall side | Scribing treads to an existing skirt is slow, careful work |
| Balustrade | Handrail, balusters, newel posts | A separate project in itself — often the biggest single line |
The Three Paths, Priced Honestly
Path 1: Refinish what you have. If your treads are already solid wood, sanding and refinishing them costs $55–$75 per tread — the same dustless equipment and Bona waterborne finishes we use on full floors, scaled down to a flight. It's the budget path and, on decent wood, the results look anything but budget.
Path 2: Carpet-to-hardwood conversion. New solid treads and fresh risers replace or cap what's under the carpet. This is the most popular stair project we do, and it's quoted per project based on tread count, landing shape, and skirt situation.
Path 3: New stair installation. New construction, reconfigurations, or stairs too far gone to save. There is no honest per-tread price for this — stringer layout, landings, railings, and code compliance differ in every house, so new stair installation is always quoted at a free in-home estimate. Anyone who prices a stair rebuild sight-unseen is guessing with your money.
What's Actually Under Your Carpeted Stairs
Almost never finished wood. Builders who planned on carpet used construction-grade fir, plywood, or particleboard treads — structurally fine, cosmetically hopeless. That's why a conversion isn't "rip off carpet, apply stain." The usual fix is retrofit: new solid-wood treads and riser faces installed over the existing structure, giving you furniture-grade surfaces without rebuilding the frame. The classic combination — stained treads, crisp white risers — also happens to be the most practical one, since risers take scuffs that touch-up paint erases in minutes.
The Split-Entry Factor
Bothell, Lynnwood, Mountlake Terrace, and big stretches of Everett were built out in the 1960s and 70s, the golden age of the split-entry home — which means the staircase is the foyer. You open the door onto two short flights, and every guest, every listing photo, every trip home starts there. We treat split-entry stairs as the centerpiece they are: it's the single highest-visibility flooring upgrade those homes can make, and because the flights are short (typically six to eight treads each), it's a smaller project than most owners expect.
Matching Stairs to the Floors Around Them
- Same species, same stain is the default: oak floors get oak treads, finished with the same color so the staircase reads as part of the floor, not an accessory. If you're still choosing colors, our guide to floor stain colors applies doubly to stairs.
- Vinyl plank homes use matching stair-nose moldings from the flooring line, glued and fastened — never floated — so planks can't creep on the nose.
- Landings are flooring, but their edges need true stair nosing. It's a detail that separates careful work from callbacks.
- Contrast on purpose works too — dark treads against pale floors — but commit to it; a near-miss color match reads as a mistake forever.
Safety and Code: The Unforgiving Part
Stairs are where woodworking meets law. Residential code caps risers at 7¾ inches, requires treads at least 10 inches deep, and allows no more than 3/8 inch of variation within a flight — because a staircase trains your body to a rhythm and then punishes any board that breaks it. Adding thick new treads over thin old ones without adjusting the bottom and top steps is the classic DIY stair error: it silently changes the first and last riser heights and creates exactly the inconsistency code exists to prevent. It's also why squeaks get fixed during a stair remodel — shimming and re-fastening the stringers and treads while things are open costs almost nothing; doing it later means undoing finished work.
Stair Installation & Remodeling FAQs
What's included in the $55–$75 per-tread refinishing price?
Why isn't new stair installation priced per square foot or per tread?
Can you turn carpeted stairs into hardwood stairs?
What kind of wood is usually hiding under stair carpet?
Do risers have to be wood-toned like the treads?
How do you match new stair treads to an existing hardwood floor?
Can luxury vinyl plank go on stairs?
How do we use the stairs while they're being refinished?
Can squeaky stairs be fixed during a stair remodel?
Ready to Make the Staircase the Best Thing in the House?
Tread refinishing, carpet-to-hardwood conversions, and full stair installation — honestly scoped at a free in-home estimate anywhere in King & Snohomish County.
Related reading: Stair installation & remodeling · Choosing a stain color · Nail-down vs glue-down vs floating · Baseboards 101
