Estimate your 2026 Seattle ADA accessibility modifications — grab bars, walk-in showers, wider doorways, wheelchair ramps, stair lifts, and full accessible-bath conversions. The calculator specs tested-to-code hardware, factors Seattle's older-home structural quirks (load-bearing walls, tight bathroom footprints), and separates one-time aging-in-place prep (like installing blocking) from full-scope accessibility upgrades.
If your primary scope is a bathroom remodel with ADA features, also check the bathroom remodel calculator with 'ADA-accessible' configuration — often cheaper than pricing a roll-in shower as a standalone ADA mod because the bath remodel already handles tile, plumbing, and floor leveling.
Define the scope and current condition of the project
Number of stories in the home (1-3)
Select the modifications needed for your project
Install ADA-compliant grab bars in bathroom (~$600)
Barrier-free shower with zero-threshold entry (~$10,000)
Widen doorframes to 36" for wheelchair access
Exterior ramp with handrails
Slip-resistant flooring throughout
Replace knobs with lever-style handles (~$600)
ADA comfort-height toilet installation (~$800)
ADA-compliant sink with wheelchair clearance (~$2,000)
Lower counter sections with pull-out shelves (~$4,300)
Motorized chair lift for stairs (~$6,000-$10,500)
Configure your project and click Calculate
Enter your project details to get started
Home accessibility modification estimates for Seattle homeowners
Unlike our other calculators that estimate whole-project costs, the ADA calculator prices individual accessibility modifications. You select which upgrades you need — grab bars, walk-in showers, wider doorways, ramps, non-slip flooring, lever handles, raised toilets, roll-under sinks, accessible counters, or stair lifts — and the calculator totals them with appropriate labor for your home's current condition.
Each modification includes material and labor costs. Structural modifications (wider doorways, ramps, walk-in showers) include framing, finish work, and any necessary plumbing or electrical. The calculator adjusts labor costs based on your home's current condition: minor modifications in good-condition homes cost less than major structural changes in older homes requiring significant demolition and repair. Permit costs are automatically included when structural work is involved.
Seattle requires permits for structural modifications like doorway widening and ramp construction. Washington State follows the International Building Code with ADA compliance requirements for residential modifications. Many accessibility modifications may qualify for tax deductions (IRS Medical Expense Deduction) or state programs like the Washington State Aging and Long-Term Support Administration (ALTSA) grants. Kolmo is SEDBE-certified, which may provide advantages for publicly-funded accessibility projects.
Simple modifications like grab bars and lever handles can be completed in a single day. Structural changes like wider doorways (1-2 days each), walk-in showers (5-7 days), and ramps (2-3 days) take longer. Stair lifts typically require 1-2 days for installation. We recommend prioritizing modifications based on immediate safety needs, then scheduling additional upgrades in phases to minimize disruption.
Yes, many ADA modifications qualify as medical expenses deductible on federal taxes (IRS Publication 502) if they exceed 7.5% of adjusted gross income. Modifications that increase home value (like a stair lift) may be partially deductible. Washington State also offers programs through ALTSA and the Department of Veterans Affairs for qualifying residents. Consult your tax professional for specific guidance.
No. Our calculator lets you select individual modifications and see costs for each. Many homeowners start with high-priority safety items (grab bars, non-slip flooring, lever handles) and plan larger structural changes (wider doorways, walk-in shower, ramp) for a later phase. Doing multiple modifications together can save on labor costs due to reduced mobilization and setup time — our whole-home scope applies a 10% discount for this reason.
Our interior painting cost calculator is built by Kolmo Construction, a licensed general contractor (License #KOLMOC*852PL) serving Seattle since 2008. We've completed over 500 interior painting projects throughout King County, from single-room refreshes to whole-home transformations. Our estimates reflect real-world costs from actual projects, not theoretical calculations. We maintain relationships with major paint suppliers, understand Seattle's permit requirements intimately, and employ only licensed, insured professionals. Every estimate includes a detailed breakdown of materials and labor, showing you exactly where your money goes. We stand behind our estimates - when you request a formal quote, we honor the calculator's projections for projects matching the described conditions.
Common Seattle 2026 pricing bands across accessibility scope. The "common package" is the typical aging-in-place bathroom conversion we see most often.
ADA-compliant grab bars into framing or blocking, lever-style door handles throughout. Fast and high-impact.
Grab bars + walk-in shower + raised toilet + one widened doorway. The standard aging-in-place bundle.
Curbless roll-in shower, wider doorway, roll-under sink, lowered counters, non-slip tile, full turning radius. Often a full bath remodel.
Yes — widening a doorway from 28 in to ADA-standard 36 in clear opening involves header reframing, drywall patch, new jamb and casing, and repaint. The calculator prices $1,200-$2,800 per doorway depending on whether the wall is load-bearing. Load-bearing walls need an engineered header (+$500-$1,200) and typically a permit.
Yes — specs ADA-compliant grab bars rated for 250-500 lb static load, installed into framing or 3/4-in plywood backing. Surface-mount bars with adhesive or drywall anchors are NOT ADA-compliant and aren't priced. Installation requires opening drywall if blocking wasn't installed originally — factored in.
A roll-in shower is a full bathroom scope change — sloped subfloor pan, linear drain, waterproof membrane, usually doubling the shower footprint for turning radius. Prices at $12,000-$22,000 in a typical Seattle full bath. If doing a broader bath remodel at the same time, run the Bathroom Calculator in 'ADA-accessible' mode instead — usually cheaper.
No — material and labor only. Permanent exterior ramps require SDCI approval in Seattle (they attach to the home with footings) — typical permit $300-$500. Portable / modular aluminum ramps generally don't need a permit and price as a no-permit option. Use our Permit Assessment tool at /permit-assessment for custom configurations.
Yes — the 'common package' scope pre-selects grab bars, lever handles, raised toilet, non-slip flooring, and one widened doorway ($8,000-$16,000 in Seattle). You can layer additional items. If planning 5-10 years ahead, install blocking for future grab bars during any current bath or wall work — cuts future install cost by 60-70% and only adds $100-$200 today.
