How much does a bathroom remodel cost in Lake Oswego, OR?

Most full bathroom remodels in Lake Oswego cost $30,000–$65,000 in 2026. Powder rooms and simple refreshes start around $15,000, and primary suites with layout changes typically run $65,000–$120,000 or more. Oregon adds no sales tax, and we give a fixed written price after a site visit.

How long will I be without my bathroom?

A hall bath is usually out of service for 4–6 weeks and a primary suite for 6–10 weeks. We order fixtures, tile and glass before demolition so the room isn’t sitting idle waiting for materials.

Do I need a permit for a bathroom remodel in Lake Oswego?

You need one if you move or add plumbing, replace valves in the wall, add circuits or change walls. The City of Lake Oswego issues the building, plumbing and electrical permits. Swapping a vanity or toilet in place generally doesn’t require one. We handle the permits and inspections.

Does a bathroom remodel add value to a Lake Oswego home?

Mid-range bathroom remodels typically recover a large share of their cost at resale, and an updated primary bath matters to buyers in this price range. The best return comes from fixing function — a walk-in shower, storage, lighting and ventilation — rather than the most expensive finishes.

Can you turn a hall bath into a primary suite bathroom?

Often, yes, by borrowing space from an adjacent closet or bedroom. We check which walls are bearing and where the drains can run before designing, because in mid-century homes the joist direction decides where a new shower or toilet can go.

Are heated bathroom floors worth it in Lake Oswego?

For most clients, yes. An electric mat under tile adds roughly $1,500–$3,500 depending on floor size, runs on a programmable thermostat, and makes tile comfortable through our long wet winters.

How do you prevent mold and moisture problems?

We use a bonded waterproofing system in every shower, flood-test the pan before tile, and install a properly sized exhaust fan that vents outside — not into the attic — often on a humidity or timer switch. Those three steps prevent most of the damage we see when we open old bathrooms.

Can you design a bathroom for aging in place?

Yes. Serden Group is CAPS-certified. We build curbless showers, wider doorways, grab-bar blocking, comfort-height fixtures, shower benches and better lighting into the design, so the bathroom works now and later without looking clinical.

Bathroom Remodeling
in Lake Oswego, OR

Primary suites, hall baths and powder rooms for Lake Oswego homes — waterproofed properly, vented properly and planned for the years you’ll live there. CAPS-certified for aging-in-place design, with one project manager from demo to final inspection.

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Local Knowledge · Lake Oswego, OR

What makes a Lake Oswego bathroom remodel different

Bathrooms here fail in predictable ways: moisture, undersized ventilation and aging plumbing. The fix depends on when the house was built.

Quick answer

A bathroom remodel in Lake Oswego, OR typically costs $30,000–$65,000 in 2026. Powder rooms and refreshes start around $15,000, and primary suites run $65,000–$120,000 or more. Most take 4–8 weeks on site. Moving or adding plumbing needs a City of Lake Oswego permit.

Lake Grove, Palisades, Uplands & Forest Highlands — mid-century homes

Much of the city’s housing is 1950s–70s ranches, split-levels and daylight basements on sloped, heavily treed lots. The bones are usually good; the layouts, wiring and ventilation are of their time.

Hall baths with small tubs converted to walk-in showers
Fans that vented into the attic rerouted outside
Soft subfloor around the toilet and tub repaired before new tile
Small primary baths enlarged by borrowing closet space

First Addition, Old Town & the lakeside — 1920s–40s cottages

The Ladd Estate era left English cottages and Tudor Revival homes with cedar shingle, native stone and plaster walls, plus Oregon Iron Company worker cottages in First Addition. Beautiful, and full of unknowns once walls open.

Galvanized supply lines and cast-iron drains replaced
Floors brought back to level before tile
Period-appropriate tile and fixtures that suit the house
Plaster walls replaced with a proper tile backer in wet areas

Mountain Park & Westlake — the 1970s–90s suites

Primary baths built around a large jetted tub and a small fiberglass shower. Most owners want the reverse.

Unused soaking tubs removed for a larger tile shower
Double vanities with more storage and better lighting
Water-damaged framing under old shower pans repaired
Interior-only work needs no HOA approval

Planning to stay? Aging in place

Serden Group is CAPS-certified (Certified Aging-in-Place Specialist). Many Lake Oswego clients plan to stay for decades, and it costs far less to build these details in now than to retrofit them later.

Curbless showers and wider doorways
Grab-bar blocking behind every wall
Comfort-height toilets and a built-in shower bench
Layered lighting and slip-resistant tile

Lake Oswego bathroom remodel costs and timelines (2026)
Scope	Typical cost	Timeline
Powder room	$15K–$30K	2–3 weeks
Hall or secondary bath	$30K–$65K	4–6 weeks
Primary suite	$65K–$120K+	6–10 weeks
Aging-in-place conversion	$35K–$75K	4–7 weeks

Bathroom permits in Lake Oswego

Moving or adding a fixture, replacing a valve inside the wall, adding circuits or moving walls needs a permit, and in Lake Oswego the plumbing and electrical permits come from the city, not the state. We file them, meet the inspectors and keep the signed-off cards for your records.

Replacing a vanity, toilet or faucet in place generally doesn’t need a permit. We confirm the scope with the city before starting.

City of Lake Oswego Building DivisionCity Hall, 380 A Avenue, 2nd floor, Lake Oswego, OR 97034 · 503-635-0390 · permits@lakeoswego.city. Applications go through the state e-Permitting (Accela) portal; walk-in intake is weekday mornings only, so call ahead.
Trade permitsElectrical, plumbing and mechanical permits are issued by the City of Lake Oswego itself, and Oregon requires the licensed electrical contractor to pull the electrical permit.
Tree code (LOC Chapter 55)Removing any tree 6 inches or more in diameter at 4.5 ft needs a city permit. Where tree protection is required, the fencing has to be installed and inspected before the building permit is issued.
Allowed work hours (LOC 34.10)Monday–Friday 7am–6pm, Saturday 8am–6pm. Permitted work isn’t allowed on Sundays or major holidays without a special permit — we schedule around it.
Review timeFirst plan review commonly runs several weeks. We confirm the current queue with city staff at submittal rather than promise a date.

Lake Oswego Bathrooms
Built to Stay Dry.

A bathroom lasts as long as what’s behind the tile. In our wet climate, that means a bonded waterproofing system, a fan that actually moves air outside, and supply and drain lines that won’t fail in five years. We build those parts right first, then make the room beautiful.

How we remodel bathrooms
in Lake Oswego, OR

How It Works

Consult

We look at the bathroom, the floor structure and the venting, talk through how you use the room now and later, and give you an honest range for the scope.

Design

Layout, fixtures, tile and lighting selections, with waterproofing, drainage and any aging-in-place details — blocking, curbless entries, lighting — specified before demolition.

Build

Our in-house crew and licensed trade partners handle demolition, plumbing, waterproofing, tile and finish work, with City of Lake Oswego inspections scheduled by us.

Daniel Tolokovoy

★★★★★

Google

Great experience working with this company. They were professional, responsive, and the quality of their work was solid. They even took the time to treat me to lunch and go over the project details, which I appreciated. Would recommend.

3 months ago

Jonah Tice

The SERDEN Group did a complete remodel of our two upstairs bathrooms. Every step of the way Dennis, and his team, were communicative, kind, timely, and productive. They worked diligently, caring about the impact of having workers in your home. Everyone was friendly and attended to our creative ideas for the bathrooms. In the end we have two amazing new bathrooms. Our family is grateful for SERDEN and are wonderfully reminded daily of their excellent work. Thank you!

7 months ago

Astanina

I recently hired Serden Group for a full kitchen and bathroom remodel, and I couldn't be happier with the results! From start to finish, the team was professional, reliable, and detail-oriented. The quality of their work is outstanding — everything from the tile installation to the cabinetry and finishes looks beautiful and well-crafted. They completed the project on time and within budget, which is rare to find these days. I highly recommend Serden Group to anyone looking for top-quality remodeling work. They truly exceeded my expectations!

Volodymyr Liashuk

I had a very pleasant experience with SERDEN GROUP company. They remodeled my bathroom, and I am completely satisfied with the result. Fast and high-quality work. Denis answered all of my questions, suggested great solutions for the renovation, and delivered everything he promised. I 100% recommend them.

4 months ago

Mega Home

Had the pleasure to work with this team on a project for one of their clients. They followed through with every request from start to finish and we can proudly say that, they really put their best foot forward with all their work. Our team would love to continue to work together for future jobs!

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