Basement restoration in Ottawa is one of the highest-volume property-insurance claims in the National Capital Region. Between spring melt off the Ottawa and Rideau Rivers, mid-winter frozen supply-line failures in century homes across the Glebe, Sandy Hill, and Old Ottawa South, sump-pump failures during heavy summer thunderstorms in Kanata, Nepean, and Barrhaven, and municipal combined-sewer backups after intense rainfall events, Ottawa basements flood, mould, and off-gas year-round.
Our Ottawa basement restoration service is a single-vendor scope: IICRC S500-aligned water extraction and structural drying, IICRC S520-aligned mould remediation under HEPA-negative-air containment, VOC and odor encapsulation with vapor-blocking shellac primers and hydroxyl treatment, under one accountable Ottawa project lead, from first call through post-remediation verification. Our scope stops at mitigation, extraction, structural drying, hazardous-material abatement, and sanitization — we do not rebuild.
Every Ottawa basement scope is prepared as a detailed itemized scope (Xactimate-format breakdown on request), photo-documented at each phase, and prepared as fully itemized professional documentation (Xactimate-format breakdown on request) accepted by Intact, Aviva, Co-operators, Wawanesa, Desjardins, TD Insurance, Economical, RSA, and every other major Canadian carrier. Clients pay us directly for mitigation services; you submit our documentation to your insurance carrier for your own independent reimbursement.
Our industry-standard protocol
- 1
Sub-90-minute Ottawa dispatch
Crews staged across the National Capital Region 24/7/365 — under 90 minutes to Centretown, the Glebe, Westboro, Alta Vista, Sandy Hill, and Old Ottawa South; under 2 hours to Kanata, Nepean, Barrhaven, Orleans, Gloucester, Stittsville, and Manotick.
- 2
IICRC S500 water extraction & moisture mapping
Truck-mounted and portable extraction of standing water. Thermal-imaging and penetrating-meter moisture mapping across affected wall materials, framing, subfloor, and insulation. IICRC Category 1/2/3 classification and Class 1–4 scope-setting before any drying equipment is placed.
- 3
Controlled structural drying
LGR dehumidifiers and axial air movers staged against a documented psychrometric baseline. Daily timestamped meter readings until every affected material reaches pre-loss equilibrium moisture content.
- 4
IICRC S520 mould remediation under HEPA negative air
Where microbial amplification is present, we build critical-barrier containment with AlorAir CleanShield HEPA 550 negative-air machines, differential pressure logged at -5 Pa minimum with a Testo 510i micromanometer, and controlled removal of impacted porous materials in accordance with IICRC S520.
- 5
VOC & odor encapsulation
Persistent basement odor loads — creosote, phenolic, tobacco, pet, sewer, and musty organic — are chemically sealed with dual-coat Zinsser B-I-N shellac vapor encapsulation, thermal fogging, and hydroxyl generator treatment. Activated-carbon filtration stages VOC adsorption during work.
- 6
Post-remediation verification (PRV)
Post-remediation verification with visual inspection and, where required, third-party air sampling before final walk-through. Our scope closes here — we do not rebuild; reconstruction is handled by a contractor of your choosing.
What's included
- ✓ Basement flood extraction & structural drying
- ✓ Sump-pump failure response (Kanata, Nepean, Barrhaven, Orleans)
- ✓ Sewer backup & Category 3 sewage cleanup
- ✓ Frozen & burst pipe response — Glebe, Sandy Hill, Centretown
- ✓ Spring melt & river-driven basement flooding
- ✓ Basement mould remediation under IICRC S520
- ✓ VOC, PAH & odor encapsulation (creosote, phenolic, musty)
- ✓ Post-remediation verification (PRV) & air sampling
- ✓ Content pack-out, cleaning & off-site storage
- ✓ itemized scope (Xactimate-format breakdown on request) + daily psychrometric logs
- ✓ Fully itemized professional documentation for your own insurance submission
- ✓ We do not rebuild — no reconstruction
Why Ottawa basements flood, mould, and off-gas more than the Ontario average
Ottawa's climate and housing stock combine to make basements the single most vulnerable part of an NCR property. Central Ottawa — the Glebe, Sandy Hill, Old Ottawa South, Centretown, Hintonburg, and Westboro — carries a large share of pre-1950 housing with original stone or poured-concrete foundations, cast-iron drains, unheated crawlspaces, and supply lines run through exterior wall cavities that freeze during polar-vortex events. The suburbs — Kanata, Nepean, Barrhaven, Orleans, Gloucester, and Stittsville — feature finished basements below grade with sump-dependent foundations that fail predictably during summer thunderstorms and spring melt.
Ottawa's combined-sewer areas discharge into basements through floor drains, laundry standpipes, and basement toilets during intense rainfall events, producing Category 3 losses that require full IICRC S500 protocols. Elevated indoor humidity through the humid Ottawa Valley summers accelerates microbial amplification, which is why basement mould in Ottawa is usually scoped one Class higher than the same loss in a drier inland market.
Ottawa neighbourhoods and suburbs we respond to 24/7
Our Ottawa basement restoration crews respond across every neighbourhood in the National Capital Region — sub-90 minutes to the core, sub-2 hours to the suburbs:
- Centretown, the Glebe, Sandy Hill, Old Ottawa South — pre-1950 heritage stock, stone and poured-concrete foundations, frozen supply-line season December–March.
- Westboro, Hintonburg, Wellington West, Mechanicsville — mixed century and infill housing, finished basements, sump-dependent foundations.
- Alta Vista, Ottawa South, Riverside, Heron Park — mid-century bungalows with finished basements, in-floor mechanical rooms.
- Kanata, Stittsville, Bridlewood, Beaverbrook — post-1980 suburbs, finished basements, sump-pump failures during summer storms.
- Nepean, Barrhaven, Bells Corners, Riverside South — high-density suburban basements, weeping-tile systems, spring-melt sewer backups.
- Orleans, Blackburn Hamlet, Gloucester, Cumberland — east-end finished basements, chronic groundwater intrusion.
- Manotick, Greely, Osgoode, Metcalfe — rural-edge properties with well and septic systems, seasonal cottage-style properties.
- ByWard Market, LeBreton Flats, downtown condo towers — high-rise mechanical-room and stack-drain failures affecting multiple units.
Beyond the NCR, the same Ottawa dispatch covers Carleton Place, Almonte, Smiths Falls, and Perth on a 2–3 hour on-site window depending on weather and time of day. See our full service areas and locations pages for coverage detail.
Ottawa basement restoration cost — what to expect
Ottawa basement restoration cost depends on three variables: water category (Category 1 clean, 2 grey, or 3 sewage), finished square footage, and time elapsed since the loss began. Typical Ottawa mitigation-phase ranges:
- Small Category 1 basement loss (clean water, single mechanical room): $2,000–$4,500
- Finished basement flood (600–1,400 sq ft, Category 1–2): $5,000–$12,000
- Sewer backup / Category 3 (whole-basement, contents pack-out, Ontario-compliant disposal): $12,000–$28,000+
- Basement mould remediation add-on (S520 containment, HEPA, PRV): $3,500–$15,000+ depending on affected area
Every Ottawa project opens with a free written itemized scope (Xactimate-format breakdown on request) so you and your adjuster see line-item pricing before any work begins.
Insurance documentation built for Ottawa adjusters
Every Canadian carrier writing basement claims in Ottawa — Intact, Aviva, Co-operators, Wawanesa, Desjardins, TD Insurance, Economical, and RSA — reviews claims in a detailed itemized line-item format (Xactimate-format breakdown accepted) with supporting psychrometric drying logs, photo evidence at each phase, and a post-remediation verification (PRV) letter on completion. That is our default deliverable on every Ottawa basement scope. Clients pay us directly for mitigation services; we provide fully itemized documentation that you submit to your insurance carrier for your own independent reimbursement. Our scope stops at mitigation — we do not rebuild.
For a full breakdown of Ottawa-specific dispatch windows, basement scope inclusions, VOC control equipment, and insurer acceptance, review the Ottawa FAQ on our home page.
Related Ottawa & Eastern Ontario services
- Water damage restoration — IICRC WRT extraction, drying, and documentation.
- Mould remediation — PMII CMR containment, HEPA, antimicrobial, PRV.
- Odor control & VOC encapsulation — thermal fogging, hydroxyl, shellac vapor blocking.
- Fire & smoke damage — IICRC FSRT soot removal and deodorization.
- Wildfire smoke remediation — HEPA extraction, HVAC decontamination, PRV.
- Board-up & tarping — 24/7 emergency stabilization.
- Complex & commercial projects — multi-unit, industrial, and heritage properties.
- Request an Ottawa basement scope — 24/7 dispatch across the NCR.
Where we respond
Crews dispatched 24/7 across Eastern Ontario, including:
Instant cost estimate
Preliminary CAD range in under a minute. A free on-site inspection confirms the scope, and financing is available while your claim is reviewed.
Estimated mitigation range
$3,978 – $5,850
Mitigation and remediation only — we do not quote or perform reconstruction.
Frequently asked questions
How fast can you dispatch a crew to an Ottawa basement flood?
Ottawa is our primary service region — home to 95%+ of our active client base — so crews are staged across the National Capital Region 24/7/365. Standard on-site response is under 90 minutes to the Ottawa core (Centretown, the Glebe, Westboro, Alta Vista, Sandy Hill, Old Ottawa South) and under 2 hours to Kanata, Nepean, Barrhaven, Orleans, Gloucester, Stittsville, and Manotick. Overnight, weekend, and statutory-holiday response windows are the same — dispatch never closes.
What does a full Ottawa basement restoration actually include?
A complete Ottawa basement mitigation covers Category 1/2/3 water extraction, IICRC S500-aligned structural drying with LGR dehumidifiers and axial air movers, moisture mapping with thermal imaging and penetrating meters, controlled removal of non-salvageable porous materials and insulation, antimicrobial treatment, HEPA-negative-air containment where mould is present, and VOC and odor encapsulation — under one accountable Ottawa project lead. Every step is documented in a detailed itemized scope (Xactimate-format breakdown on request) format for your insurer. Our scope stops at mitigation — we do not rebuild.
Do you handle basement mould remediation in Ottawa?
Yes. Every Ottawa basement scope with visible microbial amplification, elevated post-drying moisture, or a loss that sat more than 48 hours triggers IICRC S520-aligned mould remediation: critical-barrier HEPA-negative-air containment, full PPE, controlled removal of mould-impacted porous materials (affected wall materials, insulation, carpet, pad, MDF), HEPA vacuuming and antimicrobial treatment on remaining structure, and post-remediation verification with visual inspection and, where required, third-party air sampling.
How do you eliminate persistent basement odors in older Ottawa homes?
Century homes in the Glebe, Sandy Hill, and Old Ottawa South frequently carry creosote, phenolic, tobacco, pet, sewer, or musty organic odor loads absorbed into framing, subfloor, and masonry. Our odor encapsulation protocol combines HEPA-negative-air containment, mechanical substrate prep, dual-coat Zinsser B-I-N shellac primer vapor encapsulation on affected framing, thermal fogging, and hydroxyl generator treatment. The result is a chemically sealed substrate that permanently blocks residual VOC and PAH outgassing — verified with post-remediation air sampling on request.
Can you control VOCs and airborne contaminants during Ottawa basement work?
Yes. Every Ottawa basement scope with elevated VOC, PAH, or particulate risk runs under negative-pressure containment with the AlorAir CleanShield HEPA 550 or equivalent, staged with activated-carbon filtration for VOC adsorption. Differential pressure is maintained at a minimum of -5 Pa and logged with a Testo 510i micromanometer. Exhaust is ducted externally to prevent cross-contamination of occupied living spaces, and post-remediation air sampling for TVOC, formaldehyde, and phenol is available on request through a third-party lab.
Do you handle sewer backup and Category 3 basement losses in Ottawa?
Yes. Sewer backup cleanup is one of our highest-volume Ottawa services year-round. A typical Ottawa sewer backup originates in the municipal combined-sewer system during heavy rainfall, in a failed backwater valve, or in a blocked lateral between the home and the city main, and discharges into finished basements through floor drains, laundry standpipes, and basement toilets. Our IICRC S500 Category 3 protocol on an Ottawa sewer backup is non-negotiable: full PPE on entry, dedicated extraction equipment that never crosses into clean zones, removal and Ontario-compliant disposal of all porous materials touched by the contamination, EPA-registered antimicrobial treatment, HEPA negative-air containment throughout drying, and post-remediation verification. Our scope stops at mitigation — we do not rebuild.
Do you service Kanata, Nepean, Barrhaven, and Orleans from the same Ottawa dispatch?
Yes. Kanata, Nepean, Barrhaven, Orleans, Gloucester, Stittsville, and Manotick are dispatched from the same Ottawa operations desk with 90-minute to 2-hour on-site windows. Carleton Place, Almonte, Smiths Falls, and Perth are covered on the same 24/7 dispatch with 2–3 hour on-site windows depending on time of day and weather.
Will my Ottawa insurer accept your basement restoration scope?
Yes. Every Ottawa basement project is itemized on a detailed scope (Xactimate-format breakdown on request) — with daily timestamped psychrometric logs, photographic evidence at each phase, contents inventories, and a post-remediation verification (PRV) letter on completion. We prepare a full itemized documentation package (Xactimate-format breakdown on request) accepted by Intact, Aviva, Co-operators, Wawanesa, Desjardins, TD Insurance, Economical, RSA, and every other major Canadian carrier — you submit it directly for your own reimbursement. Clients pay us directly for mitigation services.
How long does an Ottawa basement restoration take start to finish?
Mitigation (extraction, drying, mould remediation, PRV) typically takes 5–10 days on an Ottawa basement scope, depending on category and affected area. Our scope stops at mitigation — we do not rebuild. Reconstruction is handled by a contractor of your choosing once mitigation and PRV are complete.
Do you handle burst pipe basement flooding in the Glebe and Sandy Hill?
Yes. Frozen and burst supply-line failures in Ottawa century homes — the Glebe, Sandy Hill, Old Ottawa South, Centretown, and Hintonburg — are our single highest-volume winter call between mid-December and early March. We arrive inside 90 minutes with truck-mounted extraction, LGR dehumidifiers, and cavity-drying equipment pre-loaded; shut and cap the failed line on arrival; extract standing water from the basement and wall cavities; document the loss with a detailed itemized scope (Xactimate-format breakdown on request); and dry to IICRC S500 endpoint moisture content with daily timestamped readings.