Mold Remediation Cost by Area Guide
The job priced by affected area and by room: size rows and room rows apart, frame by frame.
Orange County, CA · Updated 2026 · Costs shown as ranges — your quote will vary by installer and scope
The affected-area readings, priced apart by frame
| Affected area | Frame A reading | Frame B reading |
|---|---|---|
| Per square foot | $10-$25 | $15-$30 |
| 100 square feet | $1,000-$2,500 | small row, 10-100 square feet, up to $1,500 |
| Medium, 100-300 square feet | off the $10-$25 band | up to $6,000 |
| Large, 300-1,000 square feet | off the $10-$25 band | up to $15,000 |
| Whole house, over 1,000 square feet | $10,000-$30,000 | up to $30,000 |
Each reading is one frame's own counting of one area size. Nothing is averaged across sizes or frames: a 100-square-foot row is a small-area row, a whole-house row is a house row.
The room rows, priced apart: Frame B
| Room row, Frame B | 2026 reading |
|---|---|
| Attic, partial / full | $1,000-$7,000 / up to $15,000 |
| Basement, partial | $500-$6,000 |
| Bathroom | $500-$3,000 |
| Crawl space | $500-$4,000 |
Frame B prints its room rows apart from its size rows: a partial attic row is not the full-attic row, and a basement partial is not a whole-basement total.
The room rows, priced apart: Frame A
| Room row, Frame A | 2026 reading |
|---|---|
| Attic / basement | $1,000-$4,000 / $500-$3,000 |
| Crawl space / bathroom | $500-$2,000 / $500-$1,000 |
| Wall | $1,000-$20,000 |
| HVAC system, carried row | $3,000-$10,000 |
| Whole house | $10,000-$30,000 |
Frame A's room rows are its own counting, printed beside Frame B's and never merged with them: the same room name carries two frames' different bands. The two frames' per-square-foot bands differ -- Frame A at $10-$25 against Frame B at $15-$30 -- and their rows are built differently: Frame A counts standard projects and room rows, Frame B counts by-size rows and room rows apart. That difference is named as a frame difference on every page here, never averaged.
The totals behind the rows, and the neighbours named apart
Behind the rows stand the headline totals: Frame A standard projects at $1,223 to $3,757 with an average of $2,368 and labor at $75 to $120 per hour, Frame B at $1,500 to $6,000 on average. Inspection averaging $689 ($303 to $1,075) and testing at $250 to $350 basic and $450 to $800 comprehensive print as adder lines on the breakdown guide, beside its clearance testing adder. Named apart, never a row here: basement waterproofing, prevention work priced in its own cluster; drywall repair, patch-scale repair on standing walls; duct cleaning, an HVAC cleaning scope priced in its own lane; and standalone mold testing and inspection, diagnosis purchases carried here only as adder lines where a frame prints them, never as this cluster's own rows.
Reading a by-area quote, by frame
- Area size named beside every figure
- Room row read apart from the size row
Frequently asked questions
What does mold remediation cost per square foot, as reported?
Frame A prints $10 to $25 per square foot, with a 100-square-foot job at $1,000 to $2,500. Frame B prints $15 to $30 per square foot. The bands differ as a frame difference, never averaged.
What do the by-size rows print at, as reported?
Frame B prints small jobs of 10 to 100 square feet up to $1,500, medium at 100 to 300 up to $6,000, large at 300 to 1,000 up to $15,000, and whole-house jobs over 1,000 square feet up to $30,000.
What do the attic and basement rows print at, as reported?
Frame B prints an attic partial at $1,000 to $7,000 with a full attic up to $15,000, and a basement partial at $500 to $6,000. Frame A prints its own attic row at $1,000 to $4,000 and its basement row at $500 to $3,000. The frames stand apart.
What do the bathroom, crawl space, wall, and HVAC rows print at?
Frame B prints a bathroom at $500 to $3,000 and a crawl space at $500 to $4,000. Frame A prints a wall row at $1,000 to $20,000 and an HVAC system row at $3,000 to $10,000, each priced apart.
Is an area row the same purchase as basement waterproofing, drywall repair, or duct cleaning?
No. Each row here prices one remediation area as its own ticket, off standard projects at $1,223 to $3,757 in Frame A and $1,500 to $6,000 on average in Frame B. Basement waterproofing, drywall repair, duct cleaning, and standalone testing and inspection sit in their own lanes, named apart here.