Drain Field Replacement cost in Biloxi, MS
Biloxi, MS · updated August 2026
$10,100
Typical local cost
$4,900 – $20,200
Typical range
- per bedroom of design flow
- $1,450 – $4,450
- Permit
- Yes
- Typical timeline
- 2-4 days of work
Installed, local pricing
$115 – $675 in fees
2-4 days of work, 3-10 weeks including evaluation and permitting
Biloxi runs -19% against the U.S. average · data confidence Medium · modeled estimate, not a quote
The modeled midpoint for Biloxi is $10,100. The local adjustment for this trade is x0.809 — driven mainly by Harrison County labor rates and 55% exposure to local code requirements.
Cost by project size
Generated from the same unit pricing the calculator uses.
| Project size | Estimated range |
|---|---|
| 2 bedroom of design flow | $2,900 – $8,900 |
| 3 bedroom of design flow | $4,400 – $13,400 |
| 4 bedroom of design flow | $5,800 – $17,800 |
| 6 bedroom of design flow | $8,700 – $26,700 |
Based on Biloxi pricing of $1,450–$4,450 per bedroom of design flow.
Where the money goes
- Labor
- $6,300
- 60% of median
- Materials
- $3,800
- 36% of median
- Permit & fees
- $395
- 4% of median
Biloxi project costs-19% vs U.S. average
Based on Harrison County labor rates, local material logistics and permit-fee posture for this trade.
What the project looks like start to finish
Typical sequence for this scope. Timing varies with contractor backlog and plan-review queues.
01
Planning & quotes
Scope, material choice, contractor selection
02
Permit application
Filed with City of Biloxi building department
03
Materials & staging
Order lead time on non-stock materials
04
Installation
2-4 days of work, 3-10 weeks including evaluation and permitting
05
Inspection
Soil / percolation evaluation, Open trench inspection, Final cover inspection
06
Closeout
Final sign-off, warranty and documentation
Biloxi labor intelligence
What the trade charges here, and how much of your price it is.
Loaded hourly rate
$71–$92
Plumbing crews in Harrison County · -23% vs U.S. ($105/hr)
Typical crew
3 × 3.5 days
On-site time for a typical drain field job here.
Labor in the price
$6,300
62% of the median — the rest is material, disposal and permit.
Because labor is 62% of this job, Biloxi wage levels move the price far more than material prices do. A quote well under this labor figure usually means a smaller crew, a longer schedule, or unlicensed help.
Basis: Hometriva labor model: national plumbing crew rates adjusted by the Harrison County labor factor (x0.766). · BLS Occupational Employment and Wage Statistics, Hometriva methodology
Why Biloxi differs from the national average
The local delta, broken into dollars by driver.
Trade labor rates-$1,825
Harrison County crews price 23% below the national average, and labor is 62% of this job.
Material and delivery-$400
Materials are nationally traded, so they move less — but delivery into this market runs 8% under baseline.
Code and inspection load-$225
Drain Field Replacement carries 55% exposure to local code requirements, and this jurisdiction's review load indexes at x0.97.
Permit fees-$125
Fees are paid to the jurisdiction, not the contractor, and are budgeted separately from the contract price.
Basis: Decomposition of the modeled Biloxi median against the U.S. median for this scope. · City of Biloxi building department, Hometriva methodology
Biloxi vs Mississippi vs the U.S.
Change the inputs, see your number
The same local model, run against your job instead of the average one.
Simulated drain field replacement in Biloxi
$10,495
Likely range $5,295 – $20,595
Simulated from the same local model as the numbers above — it changes the inputs, not the pricing method.
What makes the number move
- Design flow, usually set by bedroom count
- Soil percolation rate and depth to water table
- Conventional trenches, chambers or an engineered mound system
- Tank condition, pump chamber and distribution box replacement
- Excavation access, tree removal and landscape restoration
Who issues each permit
Tracked per discipline — the building permit issuer is not always the body that reviews electrical, plumbing, zoning or fire.
| Discipline | Issuing authority |
|---|---|
| building | City of Biloxi building departmentModeled estimate |
| electrical | City of Biloxi building departmentModeled estimate |
| mechanical | City of Biloxi building departmentModeled estimate |
| plumbing | City of Biloxi building departmentModeled estimate |
| zoning | City of Biloxi building departmentModeled estimate |
| fire | City of Biloxi building departmentModeled estimate |
Permit requirement in Biloxi
Yes — a permit is required for drain field replacement in Biloxi, MS. The work must be inspected before it can be closed out, and a licensed contractor generally has to pull the permit.
- Permitting authority
- City of Biloxi building departmentModeled estimate
- Permit fee
- Estimated allowance $115–$675Modeled from comparable fee schedules — not an official quoted fee.
Inspections
- Soil / percolation evaluation
- Open trench inspection
- Final cover inspection
Local conditions that change this job
Only the exposures that materially affect drain field replacement.
Humidity
Severe84/100
Biloxi sits in Harrison County, Mississippi. Hurricane wind design, wind-borne debris protection and floodplain review add product-approval and inspection steps to most exterior work. Work outside city limits is permitted by the county building department rather than the city.
Nearby market comparison
| Market | Local factor | Median | Per bedroom of design flow |
|---|---|---|---|
| Biloxi (this page) | x0.809 | $10,100 | $1,450 – $4,450 |
| Gulfport | x0.846 | $10,600 | $1,500 – $4,650 |
| Mobile | x0.928 | $11,600 | $1,650 – $5,100 |
| Hattiesburg | x0.809 | $10,100 | $1,450 – $4,450 |
What Biloxi homeowners actually paid
Homeowner-reported invoices for this market. Nothing is published until enough reports clear review, so this section is often empty in newer markets — adding yours takes 20 seconds and no personal details.
Quotes homeowners were given in Biloxi
Quotes run ahead of final invoices. Reporting yours shows the local spread and where there is room to negotiate.
How Hometriva estimates Biloxi drain field costs
Hometriva does not publish invented city prices. The Biloxi estimate for drain field replacement is produced by this chain, and every input is stored separately:
- National baseline$12,500
Typical U.S. cost for drain field replacement on a single-family home.
- Local labor factorx0.766
Biloxi-area trade labor rates, weighted at 62% of this job.
- Material factorx0.915
Material and delivery pricing into Harrison County, weighted at 38%.
- Regulatory factorx0.969
Local code, product-approval and inspection load, applied at 55% for this project type.
- Applied multiplierx0.809
Blended Biloxi adjustment specific to drain field replacement.
- Permit component$115 – $675
Budgeted separately from the contract price because it is paid to the jurisdiction.
Because labor, material and regulatory factors are weighted per project, drain field replacement in Biloxi carries a different local adjustment than other trades in the same market.
Reviewed by
Hometriva Cost Data Desk
Maintains the unit-cost baselines, local adjustment factors and material pricing. Reviewed for drain field replacement pricing in Biloxi, MS.
- • National unit-cost baselines against current trade pricing
- • Local labor and materials factors for the market
- • Material installed-cost ranges and service life
Last reviewed August 2026 · Editorial standards · Report an error
Frequently asked questions
Who issues a drain field permit?
Onsite sewage permits are usually issued by the county or state health department rather than the building department, and a soil evaluation is normally required before a permit is issued.
Can a failed drain field be repaired instead of replaced?
Sometimes. Pumping, jetting or fixing a broken distribution box can restore a field that failed from overload rather than age. A field that has lost soil acceptance has to be replaced.
Do I need a permit for drain field replacement in Biloxi, MS?
In most jurisdictions this work is permitted and inspected. Requirements are set locally, so confirm the current application and inspection checklist with your building department before work starts.
How long does drain field replacement take?
2-4 days of work, 3-10 weeks including evaluation and permitting. Permit review and inspection scheduling are usually the largest source of variation.
What changes the price the most?
The largest cost drivers are design flow, usually set by bedroom count; soil percolation rate and depth to water table; conventional trenches, chambers or an engineered mound system.
Sources
Sources & verification
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.