Attic Cleanup and Re-Insulation for Seattle's Historic Homes
Green Attic LLC provides attic cleanup for homeowners in Seattle, WA. Licensed contractor (GREENAL785CS) with 4.9 stars from 102+ Google reviews. Free inspections with written, line-item estimates.
Why Seattle Homes Need Attic Cleanup
Seattle's age of housing is the primary driver of attic cleanup demand. The South End - encompassing Rainier Valley, Georgetown, and Beacon Hill - contains one of the highest concentrations of pre-1950 housing stock in the Puget Sound region. Homes of this era were not built with attic access as a maintenance consideration: small hatch openings, limited headroom, and balloon-frame construction make these attics difficult to inspect and easy to neglect.
Decades of deferred inspection allow rodent infestations to go undetected, moisture infiltration to saturate insulation, and bathroom exhaust fans to pump humid air onto roof sheathing without any intervention. By the time homeowners discover the problem - usually triggered by odor, pest sightings, or a home sale inspection - the attic requires full remediation rather than a simple top-off. Green Attic specializes in exactly this kind of deep-clean restoration for Seattle's aging housing stock.
Our attic cleanup process
Every attic cleanup project in Seattle follows the same structured process.
Free Inspection
We assess insulation condition, contamination level, rodent evidence, ventilation, and structural concerns. Everything documented with photos.
Written Estimate
Line-item pricing for removal, cleanup, sanitization, and re-insulation. Transparent pricing -no change orders.
Insulation Removal
Old insulation vacuumed out using industrial extraction equipment. Bagged and hauled for proper disposal.
Industrial vacuum extraction is the only safe method for removing contaminated insulation from pre-war Seattle attics with limited headroom and small hatch openings.
Sanitization
Attic surfaces HEPA-vacuumed and treated with antimicrobial solution to neutralize contaminants.
HEPA vacuuming and antimicrobial treatment of all attic surfaces addresses decades of accumulated particulate common in Beacon Hill and Rainier Valley homes.
Air Sealing
Exposed penetrations, gaps, and cracks sealed before new insulation goes in.
New Insulation
Blown-in insulation installed to R-49 code specification with even coverage throughout the attic.
What's Included
Attic Cleanup Scope of Work
Insulation Removal
Industrial vacuum extraction of all old contaminated insulation
HEPA Cleaning
Full attic surface vacuuming with HEPA filtration to remove fine particulate
Antimicrobial Treatment
Sanitization of wood surfaces and framing after contamination removal
New R-49 Insulation
Blown-in insulation installed to current Washington state code
Seattle City Light Rebate Documentation
We photograph pre-installation depth, post-installation verification, and prepare the full rebate package for Seattle City Light submission.
Confined-Space Attic Access
Pre-war bungalows in South Seattle often have hatch openings under 24 inches. Our crew and extraction equipment are set up specifically for these tight spaces.
Pricing
Attic Cleanup Cost
$3.50 – $5.50 per sq ft for full removal and re-insulation. Every home is different - get a free estimate for exact pricing in Seattle.
Seattle City Light Rebates for Seattle Homeowners
Many insulation and weatherization upgrades qualify for rebates from Seattle City Light and federal tax credits. We handle the paperwork.
A century of accumulation looks different in every Seattle attic. In Columbia City and Rainier Beach, we find original 1930s insulation compressed into a thin mat, layered over with 1970s-era fiberglass batts that have since been tunneled through by rats and saturated by moisture from improperly vented bathroom fans. The compounding effect is attic insulation that performs far below any code standard while also posing a health hazard.
Green Attic's attic cleanup service removes everything: old insulation, rodent droppings and nesting material, construction debris, and contaminated organic matter. We use industrial vacuum extraction equipment - not shop vacs or manual shoveling - that captures fine particulate at the source and deposits material in sealed bags for proper disposal. After extraction, every surface is HEPA-vacuumed and treated with antimicrobial solution before new insulation is installed.
New blown-in insulation goes in after air sealing around every penetration, chimney chase, recessed light, and open top plate. Seattle City Light's rebate program applies to qualifying attic insulation upgrades, and we prepare the documentation for your claim. Most attic cleanups in Beacon Hill and the greater South Seattle area are completed in one to two days.
What Seattle Customers Say
“We hired Green Attic to reframe a load-bearing wall and insulate our garage conversion. Sadeq walked us through the permit process, his crew kept the site clean, and the final inspection passed first try. Exactly what we needed from a GC.”
RRachel & Dan S.
Seattle · General Contracting
“Rats had been in our attic for months. Green Attic sealed every entry point, removed all the contaminated insulation, sanitized the space, and installed new blown-in. The whole project took two days. Our energy bill dropped $60 the next month.”
DDiana M.
Renton · Rodent Proofing + Attic Cleanup
“We needed the old insulation pulled out and new blown-in installed before closing on our home sale. Green Attic got it done in three days and helped us with the PSE rebate paperwork. Buyers were happy, we were happy.”
LLinda P.
Kirkland · Insulation Installation
Attic Cleanup FAQ for Seattle
Common questions from Seattle homeowners about attic cleanup.
How do I know if my Seattle attic needs full cleanup versus a top-off?
If existing insulation shows rodent activity, moisture saturation, mold growth, or is contaminated with droppings, it must be fully removed - there is no safe way to add new insulation over compromised material. If the insulation is simply low in depth and otherwise clean and dry, a top-off to R-49 is sufficient. During our free inspection we assess the condition and photograph our findings so you can see exactly what we see before making any decision.
What is the cost per square foot for attic cleanup in Beacon Hill or Columbia City?
Full attic cleanup including insulation removal, HEPA sanitization, antimicrobial treatment, and new blown-in insulation to R-49 runs $3.50 to $5.50 per square foot depending on contamination level and attic access. A 1,200 square foot attic in a typical Craftsman bungalow runs approximately $4,200 to $6,600. We provide a written per-square-foot breakdown in every estimate.
Does attic cleanup qualify for Seattle City Light rebates?
Seattle City Light rebates apply to the insulation upgrade portion of an attic cleanup when new material reaches R-49 or better. The cleanup, sanitization, and antimicrobial treatment portions are not separately rebated - only the installed insulation counts toward the City Light incentive. We pull together everything the program requires: pre-installation depth photos, post-installation verification, and square footage documentation. When you authorize us to submit on your behalf, we handle the application so you do not have to navigate the City Light portal.
Is attic access a problem in old South Seattle homes?
Yes, and it is one of the most underestimated factors in cleanup cost. Many 1920s–40s bungalows in Rainier Valley and Georgetown have attic hatches less than 24 inches square, with headroom under 30 inches at the center ridge. Our crew is trained to work safely in confined attic spaces, and we use extraction hoses long enough to pull material from the far corners of the attic without requiring full access to every point. We note access conditions in every estimate.
Attic Cleanup in Other Cities
Get a Free Attic Cleanup Estimate in Seattle
We serve Seattle from our Kent office. Free inspection, written estimate, no obligation.
(800) 931-1938
"Some of the attics we open up in Columbia City and Rainier Beach have not been touched since the 1930s. A century of dust, rodent damage, and moisture from improperly vented bathrooms all sitting on top of insulation that stopped working decades ago. We get it all out and start fresh."
Sadeq, Owner of Green Attic
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