Flooring Guides
Condo and HOA Flooring Rules in Los Angeles: Sound Ratings and Approvals
In a condo, the floor you choose is not only your decision. Hard floors carry footsteps to the unit below, so most associations regulate what can go down and what has to go under it. Planning around those rules before you choose a floor saves a rejected application, a delay or a floor that has to come back up.
By Los Angeles Hardwoods ·
Why associations regulate floors
When carpet comes out and a hard floor goes in, footsteps, dropped objects and chairs carry through the slab to the ceiling below. Noise between neighbors is one of the most common association disputes, so most condo rules control both the floor and the layer under it.
IIC and STC in plain terms
- IIC (Impact Insulation Class) measures how well a floor-ceiling assembly blocks impact sound: footsteps, heels, dropped items. Higher is quieter. This is the rating that matters most for flooring.
- STC (Sound Transmission Class) measures airborne sound: voices, TV, music. Floor coverings change it much less than they change IIC.
Both ratings describe the whole assembly: the floor, the underlayment, the slab or joists, and the ceiling below. A product brochure that quotes an IIC number is quoting one tested assembly. The same underlayment over a thinner slab, or without the tested ceiling, will not perform the same.
What the building code says
The Los Angeles Building Code (Section 1206) requires floor-ceiling assemblies between dwelling units to reach STC 50 and IIC 50 when tested in a laboratory, or 45 when field-tested. Those are requirements for the building assembly. Your association's rules are what decide whether a replacement floor in your unit gets approved, and some associations set their own minimums or require a field test after installation.
What associations commonly ask for
- a written application and approval before work starts;
- specification sheets for the flooring and the underlayment or membrane, often with a tested IIC rating;
- a minimum rating, a list of approved underlayments, or both;
- limits on which rooms can have hard flooring;
- work hours, elevator or loading-dock reservations, parking for the crew and debris rules;
- proof of the installer's insurance.
Every association is different, so get the current policy in writing from the management company. If it is unclear, ask what documents they need to see before you buy material.
Flooring options that often work in condos
- Engineered hardwood, glued over an acoustic membrane. A solid feel with an added sound layer. The membrane and adhesive must be compatible and approved by the flooring manufacturer. See engineered hardwood over concrete.
- Engineered hardwood or laminate, floated over an acoustic underlayment. Simpler on many slabs. Check that the underlayment is approved for the floor and has a test report your association accepts.
- Luxury vinyl or SPC with an attached pad. Water-resistant and thin, but the attached pad alone may not meet a higher requirement. Compare the published report with the rule. Read our laminate vs. luxury vinyl plank comparison.
A checklist before you get estimates
- Get the association's flooring policy, application form and any approved-product list.
- Note which rooms you want to change and what is there now.
- Check the building's rules on work hours, elevator use and parking.
- Choose the floor and underlayment together, then submit them for approval before ordering.
- Install exactly what was approved, and keep the paperwork.
At a free in-home estimate we bring samples, measure the rooms and price the floor with the underlayment your association requires. For pricing, call (323) 498-3735. See our flooring installation service.
Common questions
What IIC rating does my condo need?+
It depends on your association. The Los Angeles Building Code sets sound requirements for floor-ceiling assemblies between dwelling units, but your association's rules decide what it will approve for a replacement floor, and some set higher minimums. Ask the management company for the written flooring policy before you choose a product.
Can I put hardwood in a condo?+
Often, yes, with the right underlayment or membrane and the association's approval. Engineered hardwood glued over an acoustic membrane, or floated over an acoustic underlayment, are common approaches. Some buildings restrict hard flooring in certain rooms or require carpet in a share of the unit.
Does luxury vinyl plank automatically meet condo sound rules?+
No. An attached pad helps, but ratings are measured for a complete assembly, including the slab and the ceiling below. Check the product's published test report against your association's requirement, and whether the association accepts that report.
Who submits the flooring application to the HOA?+
Usually the owner. Associations commonly want the product and underlayment specification sheets, the rooms involved and the work dates. Keep copies of what was approved and install exactly that.