Provider profile
ServiceMaster DSI - Downers Grove
Provider snapshot
What this listing says
Downers Grove homeowners and businesses dealing with mold after water damage who want a single restoration company to handle demo, remediation, and rebuild under one roof.
Best for
- Downers Grove, Naperville, Bolingbrook, and Darien residents who need mold remediation after a water event like a burst pipe, flood, or sump pump failure.
- Homeowners who want one company to handle the full arc from emergency water extraction through mold removal through reconstruction, avoiding the hassle of coordinating multiple contractors.
- Commercial property managers who need 24/7 emergency mold and water damage response with insurance claim documentation built into the process.
- Buyers whose insurance company recommends ServiceMaster — multiple reviewers note their insurer directed them here, and the company has agreements with major carriers.
- Anyone dealing with basement mold in the western Chicago suburbs, where high humidity and seasonal flooding drive recurring growth.
About this company
ServiceMaster DSI in Downers Grove is a locally owned franchise of the national ServiceMaster Restore network, operating from 2400 Wisconsin Ave. They handle mold remediation alongside water damage, fire and smoke restoration, storm cleanup, and reconstruction. Mold is not their sole focus — it falls under a broader disaster restoration umbrella that spans demo through rebuild.
Their mold remediation process includes containment, negative air pressure, removal of porous materials that cannot be cleaned, antimicrobial treatment, and a final sealant coating. They describe addressing areas of mold larger than 10 square feet as work requiring trained crews, which aligns with standard industry thresholds. They also perform mold testing in-house, which creates a conflict of interest worth noting. The website emphasizes insurance claim navigation and offers continuing education courses for insurance adjusters — a signal that they work closely within the insurance ecosystem.
ServiceMaster Restore as a brand dates back to 1929, with over 65 years in the restoration business and more than 800 franchise locations nationwide. This Downers Grove franchise operates under the "DSI" name and maintains its own local staff, but pricing, processes, and quality can vary from other ServiceMaster locations.
4.9 stars across 308 Google reviews is unusually strong for a restoration company at this volume. Only 3 reviews at 3 stars or below appeared in the last 18 months. That ratio suggests consistent execution across a high number of jobs, though most reviews reference water damage work rather than mold-specific projects.
Services
Service area
Headquartered in Downers Grove, Illinois at 2400 Wisconsin Ave. The website names Naperville, Bolingbrook, and Darien as served areas, with a broader service footprint across the western Chicago suburbs. As a franchise location, their territory has defined boundaries — confirm coverage for addresses outside those named cities.
Review consensus
Fast response time comes up in nearly every detailed review — multiple customers describe same-day or next-day arrival. CJ earns repeated praise for water mitigation work, with reviewers calling out his knowledge, punctuality, and communication. John Santiago draws a cluster of 5-star reviews from insurance agents and homeowners who highlight his responsiveness and follow-through. Damian Guerrero receives specific praise for making the restoration process feel manageable. Tom and Joe earned recognition for basement reconstruction. Fernanda and Jackie are named for organizing pack-out crews and providing support coordination. Dawn was singled out for combining experience with compassion during a difficult situation. Multiple reviewers note the crews leave job sites clean after demo work.
2 found across 308 total reviews at 4.9★. (2 found across 308 total reviews at 4.9 stars) One reviewer in August 2025 posted a 1-star review saying only "Terrible experience" with no details. The owner responded that they could not find this person in their customer records and suggested it might be a different ServiceMaster location. The reviewer has only one Google review and no likes, which limits its weight. A second 1-star review from February 2025 complained about being charged $200 or more for an estimate visit. No owner response was posted. That reviewer has 4 total Google reviews, lending some credibility to the complaint.
A notable cluster of 5-star reviews appeared on June 10, 2025, mostly from insurance agents praising John Santiago. This looks like a coordinated ask for reviews from business contacts rather than organic customer feedback. It does not invalidate the reviews — the experiences described sound genuine — but it inflates the volume of positives from a single referral channel. The owner responds to about 67% of recent negative reviews with personalized replies that engage with specifics, not templates.
CJ (mitigation technician — praised repeatedly for knowledge, punctuality, communication). John Santiago (account manager/sales — praised by multiple insurance agents and homeowners for responsiveness). Damian Guerrero (project manager — praised for making restoration manageable). Jackie (support coordinator — praised for organization). Fernanda (pack-out organizer — praised for crew coordination). Tom (reconstruction — praised for basement rebuild quality). Joe (reconstruction — praised alongside Tom). Dawn (unknown role — praised for compassion and experience). Mike (carpet cleaning/field work — praised for cleaning quality). Sebastian (field technician — praised for reliability). Sam Schumacher (mold remediation lead — praised for mold removal work). Roberto (field technician — praised for respectfulness). Leslie (field support — mentioned positively). Allen Greenway (field service technician — praised for being easy to work with). Mitchell (crew lead — praised for communication). Angel Villalobos, Mike Perez, Christian Ramirez (duct cleaning crew — praised for professionalism). Armando (unknown role — thanked for empathy and kindness).
This franchise earns its 4.9-star rating through fast emergency response and strong crew-level communication. Ask for CJ on water mitigation work or Sam Schumacher if your job involves mold removal specifically. Get your mold testing done by an independent third party before engaging them for remediation, and clarify estimate fees before scheduling.
Keep in mind
- They do both mold testing and mold remediation. A company that tests for mold and then sells the remediation has a financial incentive to find problems. Consider getting an independent mold test from a company that does not also do removal.
- At least one reviewer reported being charged $200 or more just for an estimate visit. Ask upfront whether the initial assessment is free or carries a fee, and whether it applies toward the remediation cost.
- Rebuild work uses subcontractors. One reviewer praised the demo crew but said the rebuild team had communication issues and would not take responsibility for subcontractor defects. The owner responded that the sub had addressed it, but the reviewer disagreed.
- This is a franchise. Quality depends on local ownership and staff, not the national brand. Reviews for this Downers Grove location do not reflect other ServiceMaster locations, and vice versa.
- Most reviews reference water damage or fire restoration, not mold-specific work. The mold remediation track record is harder to assess from reviews alone.