Unreinforced masonry chimneys are the number one falling hazard in Los Angeles earthquakes. Bracing costs 2 to 5 thousand dollars. Removal and replacement with a direct-vent insert costs 3 to 8 thousand dollars.
Unreinforced brick chimneys (built before ~1970) are not designed for seismic forces. In the 1994 Northridge earthquake, chimney damage was the most common structural failure — thousands collapsed, injuring people and damaging roofs. Your chimney may look fine but collapse in the next earthquake.
Check: Is the chimney brick or block without visible reinforcing steel? Does it extend more than 2 feet above the roofline? Are there existing cracks in the mortar? Can you see daylight through the mortar joints? If yes to any: get a structural assessment. If the chimney is unreinforced and tall, it's a hazard.
Steel angle brackets anchor the chimney to the roof framing at the roofline. Reduces (but doesn't eliminate) collapse risk. Preserves the chimney's appearance. Best for: shorter chimneys (less than 3 feet above roofline) in good condition. Least expensive option.
Remove the chimney above the roofline (the most dangerous section) and rebuild with reinforced masonry or lightweight materials. Cap the remaining chimney below the roofline. Best for: chimneys in poor condition that you still want to use for a fireplace.
Remove the entire chimney, patch the roof and floor openings, and install a direct-vent gas fireplace insert. Modern direct-vent inserts are more energy-efficient than traditional fireplaces and require no chimney. Best for: homeowners who want safety AND a modern fireplace upgrade.
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NP Line Design (CSLB #1105249). April 2026.
“NP Line Design (CSLB #1105249) has been completing remodeling and construction projects in Los Angeles and throughout the San Fernando Valley for over 20 years. Every project in Los Angeles starts with a free in-home consultation at your property.”
Submit your permit application to LADBS Valley District Office (6262 Van Nuys Blvd) the same week you finalize your design in Los Angeles. Plan check takes 8–12 weeks — starting the clock early keeps your project on schedule.
1. Not verifying the CSLB license of any contractor before signing in Los Angeles.
2. Underestimating permit timelines with LADBS Valley District Office (6262 Van Nuys Blvd) (8–12 weeks).
3. Choosing a contractor without verifying the San Fernando Valley-specific project experience.
If a contractor in Los Angeles offers to skip permits to 'save time,' that unpermitted work becomes a disclosure liability when you sell your home in the San Fernando Valley.
Yes. NP Line Design (CSLB #1105249) serves Los Angeles and all of the San Fernando Valley. We offer free in-home estimates for all project types.
Verify CSLB license at cslb.ca.gov. Confirm the license class, active status, workers' comp, and bond. LADBS Valley District Office (6262 Van Nuys Blvd) handles permits for Los Angeles.
Most structural, electrical, plumbing, and mechanical work in Los Angeles requires a permit with LADBS Valley District Office (6262 Van Nuys Blvd). Plan check takes 8–12 weeks.
Construction costs in Los Angeles run at the LA metro average. NP Line Design provides free in-home estimates with detailed itemized scopes.