TPO roof cost in West Hollywood is set by what sits under the membrane as much as by the sheet itself. TPO is a single-ply roofing sheet, welded at the seams, and it lies on a stack that starts at the deck. Firmament Roofing reads that stack first. The written quote then prices the deck work, the insulation or base layer, the membrane, the edge metal and the permit on separate lines, so you can see where each dollar goes.
The stack under a TPO sheet
Start with the deck. Above it sits a base or insulation layer, a cover board where the system calls for one, then the TPO sheet, then the edge metal and flashing that close it at the perimeter, walls and penetrations.
Each layer has a job and a line on the quote. Insulation that has gone wet under an old membrane has to come out. A deck that has soaked loses strength. A quote that gives one price for TPO and nothing else is pricing the sheet and hiding the stack. Ask for the layers in the order they go on, from the boards up.
The sheet's seams are welded with hot air, so the layers under them need to be sound and dry before the weld goes down.
TPO roof cost: the lines that move the price
Angi's 2026 Los Angeles page gives about $8.60 a square foot for roof area, within a range of $4 to $12. That rate spans every covering, so a TPO figure comes from a written quote and not from the average.
Tear-off or recover comes first: removing the old layers runs $1,000 to $3,000 on Angi's 2026 page, and the County's reroof manual limits a recover to one existing layer on a sound, dry deck, with West Hollywood's own Building and Safety Division ruling on your building. Wet insulation and soft deck are replaced and priced as found. Each drain and penetration is flashed by hand, and parapet cap and edge metal run the whole perimeter. The permit fee is the city office's to set.
Why white matters for the permit
TPO is made in white, and the label on the product is what the permit paperwork needs. On a single-family roof, work past the halfway mark brings in the state cool roof rule, and a recover is counted as a replacement. A low-slope reroof faces the higher of the state's two sets of figures, which a listed white sheet is built to clear.
A CRRC listing shows the aged values for a product. The scope should name the product, so the label, the permit file and the roof agree. Rules for apartment and condo roofs differ from the single-family ones, and the city's Building and Safety Division can say which set covers your building.
Drains, penetrations and the parapet
The sheet is flat, and the work is at the edges. Drains and scuppers decide where water leaves. Slope built into the insulation, called tapered insulation, moves standing water toward them. Standing water for several days points to a design fault, and it is worth pricing the fix while the roof is open.
Parapet walls need flashing and a cap. Pipes, vents and rooftop equipment each need their own flashing detail. The quote should list them by count. A West Hollywood building with many penetrations costs more to roof than a clean deck of the same size, and the list tells you why.
A board's copy of the quote
Condo and apartment roofs here are approved by an association or a manager, and the decision is easier when the quote is built for a reader who has never been on the roof. We break the job into the layers, with the deck allowance stated and the permit named, so approval covers a defined scope.
Include the building type, the unit count if known and the name of whoever signs. The visit looks at the same things whether the building is a small commercial block or a courtyard of apartments: layers, insulation, drains, edges, penetrations.
Get the TPO roof priced from the boards up
If you are pricing TPO in West Hollywood, the next step is a visit. Tell us the building type, the rough size of the roof, what the roof is made of now, where you see water and how many layers you know of, since the County's manual allows a recover over one layer and no more.
Send the form, or call (323) 366-5735. The written quote prices the deck work, the insulation, the membrane, the edges, the drains and the permit apart, so you can check the total against the roof before you sign.
TPO roof cost questions
What makes a TPO roof cost more on one building than another?
The layers under the sheet, the deck condition, the number of drains and penetrations, the length of parapet and edge metal, and whether the old roof is torn off or recovered. The quote prices each of those apart.
Is a recover cheaper than a tear-off?
A recover skips the removal cost, but the County's manual allows it only over a single existing layer on a sound, dry deck, and West Hollywood's own office rules on your building. A tear-off shows the deck and any wet insulation. Ask for both prices if both are allowed on your building.
Does the TPO quote include the permit?
Yes, priced apart from the roof. West Hollywood's Building and Safety Division takes the application and does the inspections, and the quote names the cool roof paperwork alongside it, so the paperwork is already in the total you are comparing.