Microcementin Los Angeles, CA
Microcement has no permit rule of its own in Los Angeles: no City source names microcement, so whether a job needs a permit is a question for LADBS, and the closest listed items cover coatings on roofs, decks and balconies. It is a thin finish, not structure or waterproofing, and we publish no price because no independent source exists.
Los Angeles installers apply microcement to bathroom walls, shower surrounds, kitchen counters, fireplaces, stairs and floors. It is a few trowelled layers of cement-based coating under a sealer, so whatever sits beneath it, framing, backer board, tile or concrete, still does the real work.
This page is deliberately short on promises. It covers the permit question the City has not answered, where the material fits the city's housing, what a shower needs underneath it, and the exterior and historic-district limits. On these jobs MDG Builders, CSLB #1040337, plans the scope, puts the permit question to the City and sequences the trades, and a licensed specialty subcontractor trowels the coating. The material, the finish questions and what sets the price are on our microcement page.
What the City's documents say, and do not say, about microcement
Where microcement permits come from in Los Angeles: Los Angeles Department of Building and Safety (LADBS).
- No City source names microcement. The nearest listed items are the express permit items for applying an approved coating to an existing exterior balcony or deck and to an existing roof, so ask LADBS whether a cementitious overlay counts as an approved coating.
- In an HPOZ, concrete alterations and other exterior changes need City Planning approval even without a building permit, which would include an exterior cement-based finish.
Does microcement need a permit in Los Angeles?
Nobody can answer that from a City document yet, as the notes above make clear. The useful questions for LADBS are whether a cementitious overlay counts as an approved coating, and whether an interior wall or floor finish with no plumbing, wiring or framing change needs anything at all.
What changes the answer is the work around the coating. Replacing a shower valve, moving a drain or rebuilding a shower pan is bathroom work, and a residential bathroom remodel with no structural change is on the LADBS express list. Framing a new bench, a niche or a wider opening is structural and is a different conversation. We get the LADBS answer for the specific scope in writing before scheduling.
In a rent-stabilized building, it is the plumbing behind a coated shower, not the coating itself, that can bring the Tenant Habitability Program into play. Replacing supply or drain lines in an occupied unit is the step to raise with the Los Angeles Housing Department first.
Where microcement walls and floors work in Los Angeles houses and condos
The best candidates are rooms with a sound, stable base already in place or being built new. A powder room or hall bath rebuilt down to backer board, a kitchen backsplash on new drywall, a fireplace surround, or a floor over a flat concrete slab that meets the system maker's limits are all reasonable places to consider it.
Older stock calls for more caution. With nearly half the City's homes built before 1960 and about one in five before 1939, an older wall may be plaster with hairline cracks, and a thin coating copies whatever moves beneath it. A raised wood floor that flexes is a riskier base for a rigid cement finish, which is why we look at the framing and the crawlspace before anyone talks about color.
Condos, hillside houses and kitchens: what to check before microcement walls go in
In a condo in Venice or Brentwood, read the HOA's renovation rules before the sample board stage, since a building can restrict work hours, noise and how materials come in. In a hillside house in Bel Air or Laurel Canyon, the Hillside Construction Regulations limit Saturdays to interior work, which suits a coating job but still shapes deliveries.
Kitchens deserve their own check. A counter takes heat, knives and acids that a wall never sees, so in a busy family kitchen in Encino or Sherman Oaks we ask the system maker for written guidance on counters before suggesting one, and keep the coating to the backsplash when that guidance is thin. The other work we coordinate around a kitchen or bath is listed on our Los Angeles page.
Microcement surfaces in older Los Angeles showers: what goes underneath
In a shower, microcement is the finish layer over a waterproof assembly, never the assembly itself. Under the coating you still need a sloped pan, a membrane across the walls and curb, and sealed corners and valve openings, the same hidden work a tiled shower depends on.
Older Los Angeles bathrooms make the base question sharper. The Housing Element ties older housing to more mold and to plumbing that is likelier to be inadequate, so a shower that has leaked for years should be opened and rebuilt, not coated over. Ask who installs the membrane, whether it is flood tested before the coating goes on, and who warrants each layer.
Plan the cure into the calendar as well. The system maker sets how long the sealed surface must sit before it gets wet, and a house with one bathroom needs somewhere else to shower until then. Our comparison of microcement and tile lays out the wet-area trade-offs side by side.
- Which membrane goes under the coating, and who installs it?
- Is the pan flood tested before the base coat?
- What cure time does the maker require before the first shower?
Exterior microcement surfaces on Los Angeles patios, balconies and historic facades
Outdoor use is where we are most careful. Los Angeles gets most of its rain from December through March and almost none in summer, per the NWS downtown normals, and we found no independent data on how microcement holds up to that cycle or to full sun. Ask the system maker in writing whether the exact product is rated for exterior use, and over what base.
A balcony or deck over a room below is a waterproofing job before it is a finish, and the deck coating item on the LADBS express list is the nearest City reference for it. Until LADBS says whether a cement-based overlay qualifies, treat the membrane and the drainage as the real scope.
In an HPOZ, an exterior cement-based finish counts as an exterior change, and as the notes above say, City Planning approval is needed even where no building permit is. A coated porch, front steps or a facade in a district such as Highland Park-Garvanza goes to the HPOZ planner before any sample is made. Glendale, Burbank and Santa Monica run their own building departments, so the same permit question has to be asked there separately.
Microcement details from Los Angeles homes
Three views of the samples, bases and finishes behind a Los Angeles microcement job. Tap a photo to enlarge it.
What microcement costs around Los Angeles
We publish no microcement price for Los Angeles, because every figure we found came from installers or suppliers who sell it, and they differ by more than double. Surface prep, tile removal, shower waterproofing, the size and shape of the area, the system and sealer, and access set the cost, as our microcement page explains, and a written proposal after a site visit is the only number we give. The same lot often needs other work, so see bathroom remodeling in Los Angeles, flooring installation in Los Angeles and kitchen remodeling in Los Angeles. If the home is in Glendale or Pasadena, the City documents differ, and the Glendale building overview and the Pasadena building overview show where.
Other work we manage in Los Angeles
Microcement questions for Los Angeles homes
Will I need an LADBS permit to coat my bathroom in microcement?
We cannot say from a source, because no City document names microcement. Ask LADBS with your exact scope. If the job also replaces fixtures or rebuilds the shower without structural change, that work fits the bathroom express permit path. Coating a sound wall with no plumbing, wiring or framing change is the case to ask LADBS about directly.
Why is there no microcement price for Los Angeles on this site?
Because no independent source publishes one. The figures we found come from installers and suppliers who sell microcement, and they differ by more than double, largely because a thin overlay and a full wet-area system are different jobs. We price each project in a written proposal after seeing the surface, the base and any waterproofing it needs.
Can microcement be used on a Los Angeles patio or balcony?
It can be, but go carefully. We found no independent data on how microcement performs outdoors in Southern California sun and winter rain, so get the maker's written confirmation that the product is rated for exterior use over your base. A balcony over a room needs proper waterproofing first, and LADBS can say whether its coating express item applies.
Is microcement allowed on a house in a Los Angeles historic district?
Outside, only with HPOZ approval. City Planning requires approval of exterior changes, including concrete alterations, in a Historic Preservation Overlay Zone even when no building permit is needed. Nothing we found on City Planning's pages addresses interior finishes, so ask the district's HPOZ planner about inside work and bring a coated porch, step or facade to them first.
Can microcement go over the old tile in a 1930s Los Angeles bathroom?
Only if the tile and what is behind it are sound, which in an old bathroom you confirm rather than assume. Los Angeles installers do coat over well-bonded, flat tile, but loose tile, cracked grout or a shower that has leaked means the base should be opened and rebuilt first. Ask the installer how bond and flatness will be tested.
Does microcement work over a raised wood floor in an older Los Angeles house?
We are cautious about it. A thin cement coating copies the movement under it, and a wood subfloor that flexes or has soft spots is a risky base. Ask the system maker whether the product is approved over wood framing and what reinforcement or underlayment it requires, and have the framing checked from the crawlspace first.
Are microcement surfaces waterproof enough for a Los Angeles shower?
Not on their own. Microcement is a coating, not a waterproofing system, so a shower needs the correct base, membrane, reinforcement and sealer beneath it. One supplier's FAQ says to wait at least 14 days after the final sealer before water touches the surface. The maker's data sheet for your exact product sets the real cure time.
How long does microcement last in a Los Angeles home?
We found no independent test data, so any lifespan figure comes from sellers and installers. Vendor blogs mention resealing every two to five years, which we could not confirm independently. The base, the sealer and the wear a surface gets decide the result, so ask the installer what the warranty covers for the coating and the sealer.
Ask about microcement for your Los Angeles home
Tell us the surfaces, the age of the house and whether any of them get wet, and we will look at the base before we talk about finishes.