u/BuildADULA

I’ve been noticing that ADU costs around West LA still surprise people more than almost anything else.

Especially in places like Mar Vista, Rancho Park, Beverlywood, Mid City, Santa Monica, and Culver City.

Rough ranges I keep seeing:

Garage conversion:
$175k–$250k

Detached ADU:
$280k–$400k

Two-story ADU:
$375k–$550k+

The big swings usually come from the boring stuff.

Electrical upgrades.
Sewer location.
Foundation work.
Fire-rated walls.
Access to the back of the lot.
How far utilities need to run.

What looks workable on paper may not fit cleanly on the actual lot.

From what I’ve seen, the biggest difference is early property review.

The practical takeaway is simple: square footage matters, but the lot conditions often decide the real budget.

Curious if other homeowners, designers, or builders around West LA are seeing similar numbers.

I’ve been noticing that early plan review comes up more than people expect in ADU projects around West LA.

Especially in places like Mar Vista, Rancho Park, Beverlywood, Mid City, Santa Monica, and Culver City.

Standard plans.
Review timing.
Smaller ADU options.
Lot conditions.

What looks workable on paper may not fit cleanly on the actual lot.

From what I’ve seen, the biggest difference is early property review.

With SB 543, there may be some benefits for homeowners, but the property still needs to be checked early.

Curious if other homeowners, designers, or builders around West LA are seeing the same thing.

I’ve been noticing that ADUs around West LA don’t really run like normal home additions, but they also don’t feel like simple backyard projects either.

The structure may be small.
But the property issues can be big.

Especially in places like Mar Vista, Rancho Park, Beverlywood, Mid City, Cheviot Hills, Culver City, Santa Monica, and nearby LA neighborhoods.

Setbacks.
Access.
Utilities.
Fire clearance.
Parking.
Privacy.
Drainage.
Older lots.
Tight driveways.
City-by-city review differences.

That middle ground creates its own planning category.

From what I’ve seen, the biggest difference is early property review.

What fits on paper may not fit cleanly on the actual lot.
A standard ADU plan may look approved, but the site still decides a lot.

Without checking the property early, the project can get blurry fast.

Curious if other West LA / Culver City / Santa Monica homeowners, designers, or builders are seeing the same thing.

Do you think ADUs in older Westside neighborhoods need their own early planning system before design starts?

I’ve posted about SB 543 before, so I don’t want to repeat the same points.

The part I keep coming back to is this:

Even if the 500 sq. ft. JADU change helps on paper, the real question for homeowners is still property fit.

In West LA, a lot depends on the existing house layout, garage condition, side-yard access, utilities, fire clearance, and whether the space can actually become something functional without forcing a bad design.

That’s why I think SB 543 may matter most for homes where a detached ADU is possible but not ideal.

For example:

A detached ADU might create access or utility headaches.

An attached ADU might be cleaner but affect the main house.

A JADU might be simpler, but only if the existing layout makes sense.

So instead of asking, “Is SB 543 good or bad?” I think the better question is:

Will this make more homeowners compare ADU, attached ADU, and JADU options before jumping into one plan?

Curious if anyone else is thinking about it this way.

Curious if anyone in LA has actually felt a difference yet from AB 253 on ADU plan check.

Mainly wondering about West LA, SFV, Silver Lake, and nearby parts of LA.

On paper it sounds like approvals should move faster now, but I’m not sure whether homeowners are really seeing that yet or if it still feels like the same process with a new law on top of it.

If you submitted recently, did anything actually move faster?