This guide breaks down real pricing for every common chimney repair in London Ontario for 2026, plus what to watch for and when a repair stops making sense and a rebuild starts. Written by Lancaster FBC, a licensed and insured masonry contractor serving London since 2005.
Chimney Repair Cost, Quick Price Table
| Repair Type | Cost Range (CAD) | Typical Timeframe |
|---|---|---|
| Chimney inspection | $150, $400 | 1 hour |
| Chimney crown repair | $400, $1,500 | 1 day |
| Chimney cap replacement | $200, $600 | 1 hour |
| Flashing repair / replacement | $300, $1,200 | Half day |
| Tuckpointing / repointing (partial) | $800, $2,500 | 1-2 days |
| Tuckpointing (full chimney) | $2,500, $5,000 | 2-4 days |
| Chimney liner / relining | $1,500, $4,500 | 1-2 days |
| Brick replacement (spot repair) | $400, $1,500 | 1 day |
| Top rebuild (top 1-3 ft) | $2,000, $5,000 | 1-3 days |
| Full chimney rebuild | $5,000, $15,000+ | 1-2 weeks |
Prices for London Ontario as of 2026. Quoted in CAD. Actual quotes vary based on access, height, and severity.
What Affects Chimney Repair Cost?
Five things drive the final price:
1. Height and access
Single-storey ranch chimney = easy. Three-storey Victorian in Old North = scaffolding + harness + permits. Scaffolding alone adds $500, $1,500 to a job.
2. Severity
A hairline mortar crack caught early is a $500 repair. The same chimney left alone for two more winters can become a $5,000 rebuild because water has destroyed the brick.
3. Material quality
Standard repointing mortar runs less than a heritage lime-based colour match. Custom brick to match a 1920s home costs more than off-the-shelf brick.
4. Inspection findings
About 30% of jobs reveal more damage once work starts (hidden flashing rot, internal liner damage). A reputable contractor gives you a base quote plus a documented allowance for surprises, not just one fixed number that gets blown out later.
5. Time of year
Spring and fall are peak masonry season in London, pricing reflects that. Booking work in early spring (March/April) or late fall (October) usually beats July rates.
Signs Your Chimney Needs Repair
If you see any of these, call a qualified chimney contractor for an inspection:
- White powdery residue (efflorescence) on the brick, water is moving through the masonry
- Mortar joints you can scrape with a screwdriver, failing mortar
- Cracked or missing crown at the top of the chimney
- Rust on the cap, damper, or firebox, water damage already happening
- Spalling, brick faces flaking off
- Smoke smell inside the home when fireplace isn't lit, possible flue or liner issue
- Stains on the ceiling around the chimney, flashing leak
- Loose, leaning, or bowed chimney, structural, get it inspected immediately
A professional chimney inspection in London costs around $150 to $250 and gives you a written report on what's needed.
Chimney Repair vs Chimney Rebuild, When Does It Stop Making Sense?
Rule of thumb we use: if repair costs exceed 60% of a full rebuild, rebuild.
A patched chimney that gets one more freeze cycle of damage will need the same work again in 3-5 years. A properly rebuilt top section with new mortar, new flashing, and a new crown should be good for 30+ years.
Rebuild the top portion if:
- More than 30% of bricks are spalling
- The crown is fully cracked or missing
- Mortar throughout the top 2-3 feet is failing
- Flashing is rusted through
Rebuild the full chimney if:
- Chimney is leaning or visibly out of plumb
- Multiple courses of brick are loose or shifted
- The structure is more than 60-70 years old and has never been restored
- Internal liner is damaged AND mortar is failing
Should I Use Insurance for Chimney Repair?
Standard homeowner insurance in Ontario typically covers:
- Sudden damage (lightning strike, wind, falling tree)
- Water damage from a roof leak (sometimes)
Standard insurance typically does NOT cover:
- Wear-and-tear from age
- Lack of maintenance
- Mortar deterioration
- Freeze-thaw damage over time
A good contractor will tell you honestly whether a claim is worth filing. We've had clients waste deductibles on jobs insurance was never going to cover.
How Long Does Chimney Repair Take?
| Job | Time on Site |
|---|---|
| Inspection | 1 hour |
| Cap replacement | 1-2 hours |
| Crown repair | Half day to 1 day |
| Tuckpointing (partial) | 1-2 days |
| Top rebuild | 2-4 days |
| Full rebuild | 1-2 weeks |
How to Choose a Chimney Repair Contractor in London
Ask every contractor:
- Are you properly certified for wood-burning work? For any wood-burning appliance work, verify credentials before hiring.
- Are you fully insured? Get the certificate, not just verbal confirmation.
- Is the work in writing? A reputable masonry contractor provides a written, itemized quote.
- What warranty do you offer? Workmanship warranty should be 1-5 years minimum.
- Can I see recent work? Photos of similar jobs, local addresses if possible.
- References? At least 3 phone numbers from London-area homeowners in the last 12 months.
If the answer to any of these is vague or evasive, walk away.
Related reading: chimney repair services · tuckpointing details · chimney FAQ
Free Quote · No Obligation Call Matt at 519-671-3323 or email [email protected]. Family-run since 2005. Serving London · St. Thomas · Strathroy · Woodstock · Ingersoll · Stratford · Port Stanley.