Radon Mitigation Cost by Home Size Guide
The mitigation job priced by home size, lines apart.
Orange County, CA · Updated 2026 · Costs shown as ranges — your quote will vary by firm and scope
Size readings, priced apart by frame
| Size row | Frame A reading | Frame B reading |
|---|---|---|
| Per-square-foot row | $0.24-$1.18 per square foot, Los Angeles read | no per-square-foot line printed |
| Whole-job total row | $805-$1,326, average about $1,043 | active soil depressurization at $1,200-$2,000 |
| Larger-home row | $500-$1,500 more for larger homes | $2,500+ for larger homes on the active soil line |
| Los Angeles total row, apart | $786-$1,276, average $1,031 | no city read printed |
Each reading is one frame counting of one size row, never blended. Per-square-foot lines and whole-job totals stand apart inside each frame, never converted into one another.
Method lines behind the size rows, printed once
| Method row | Frame A reading | Frame B reading |
|---|---|---|
| Active soil depressurization row | most common method, inside the $805-$1,326 band | $1,200-$2,000, $2,500+ for larger homes |
| Drain-tile suction row | inside the $805-$1,326 band | $900-$1,800 |
| Sump pit and crock sealing row | inside the $805-$1,326 band | $900-$2,500 |
| Wall-based row | inside the $805-$1,326 band | $500-$3,000 |
| Ventilation row | inside the $805-$1,326 band | $1,300-$2,500 |
| Water mitigation row | inside the $805-$1,326 band | $1,200-$5,000 |
The method lines stand once here, shared by the size rows, priced apart and never averaged.
Testing, permits, and the neighbouring jobs
| Own-ticket line, as printed | 2026 reading |
|---|---|
| Frame A radon testing row, own ticket | $150-$700 |
| Frame A permit row, own ticket | $25-$150 |
| Frame B crawl-space encapsulation row, own job | $3,000-$15,000 |
| Frame B basement waterproofing row, own job | $6,000-$18,000 |
| Frame A Los Angeles read, apart | $786-$1,276, average $1,031, at $0.24-$1.18 per square foot |
Testing and permits stand as their own tickets on every size row. The frames count the same mitigation job on different bases -- a verified-project national band in Frame A ($805-$1,326, average about $1,043, on 1,184 verified projects) against a by-method installed table in Frame B ($1,200-$2,000). The Los Angeles read in Frame A at $786-$1,276, average $1,031, at $0.24-$1.18 per square foot, stands inside Frame A alone, never carried into Frame B. Those differences are named as frame differences on every page, never averaged.
The neighbours named apart
Named apart, never a row here: radon testing (its own ticket, priced before any mitigation line), the home-inspection guide inspection menu, crawl-space encapsulation, basement waterproofing, and sump pump installation and repair -- this cluster carries no testing, inspection, encapsulation, waterproofing, or sump guide of its own.
The local read
The honest local read: reported radon levels read low across most of Orange County, and the work is still priced in the California frame here -- the Los Angeles read stands as the local Frame A read, and testing stands first as its own ticket.
Reading a by-size quote
- Size line named beside each figure
- Per-square-foot lines read apart from whole-job totals
Frequently asked questions
What does radon mitigation cost by home size, as reported?
Frame A prints $0.24 to $1.18 per square foot on its Los Angeles read and whole-job totals at $805 to $1,326. Frame B prints whole-job totals alone, active soil depressurization at $1,200 to $2,000.
What does a larger home print at, as reported?
Frame A prints $500 to $1,500 more for larger homes. Frame B prints $2,500 plus for larger homes on its active soil depressurization line. Two countings, never blended.
What is the Los Angeles whole-job reading, as reported?
Frame A prints its Los Angeles read at $786 to $1,276 with average $1,031. Frame B prints no city read -- a frame difference.
What do testing and permits add, as reported?
Frame A prints radon testing at $150 to $700 and permits at $25 to $150 as their own tickets, named on every page, never folded into a size row.
Is the per-square-foot line a whole-job price?
No. The $0.24 to $1.18 per-square-foot line stands apart from whole-job totals inside Frame A, and neither line is converted into the other on this guide.