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Mississippi Building Codes, Permits and Contractor Rules

Here’s every rule from our 50-state guides for Mississippi on one page: the residential building code, frost depth, retaining wall permits, the 811 dig law, drainage law, contractor licensing, deposit limits, mechanics lien deadlines, workers’ comp, planting zones and frost dates. Each section links the official source and the full 50-state comparison.

Mississippi at a glance

Building code: Set by cities and counties
Frost depth: Set by your local building department
811 notice: Not less than 3 and not more than 10 working days before excavation (submerged work: 7 working days)
Contractors: State license required
Deposits: No statewide cap
Liens: 90 days from last furnishing
Workers’ comp: 5+ employees
Drainage rule: Reasonable use
Planting zones: 7b to 9a

Topic	Mississippi	Compare
Residential building code	Set by cities and counties	All states
Frost line depth	Set by your local building department	All states
Retaining wall permit	Set locally	All states
811 notice before digging	Not less than 3 and not more than 10 working days before excavation (submerged work: 7 working days)	All states
Contractor license	State license required	All states
Deposit limit	No statewide cap	All states
Right to cancel	3 business days, sales made at home	All states
Lien filing deadline	90 days from last furnishing	All states
Workers’ comp required	5+ employees	All states
Drainage between neighbors	Reasonable use	All states
Planting zones (2023 USDA)	7b to 9a	All states
Frost dates (NOAA)	Last frost late Feb (Gulfport-Biloxi) to late Mar (Tupelo); first frost early Nov (Tupelo) to early Dec (Gulfport-Biloxi)	All states

Summary for Mississippi. Details, exceptions and official sources are in each section below.

Mississippi residential building code

Code: Codes adopted by the Mississippi Building Codes Council; cities and counties that did not opt out in 2014 must use one of the three most recent IRC editions, and coastal counties must enforce the state code
How it applies: Statewide, but municipalities can opt out
Code agency: Mississippi Building Codes Council
Who enforces it: Local governments could opt out of the 2014 statewide code. Coastal counties are required to adopt and enforce it. Elsewhere, whether codes are enforced depends on the city or county.
Good to know: Mississippi's coastal counties must adopt and enforce the state building code. Elsewhere, cities and counties could opt out in 2014, and those that enforce a code use one of the IRC editions the state allows, so check with your local building office.

Compare building codes in all 50 states

Frost line depth in Mississippi

Who sets it: Local building department
Local examples: City of Oxford: 12 in. minimum footing depth below grade (no frost depth stated)
Good to know: Mississippi's factory-built home rule (19 Miss. Code R. 7-5.06.7.5) requires pier footings below the frost line but gives no number. Check with your local building department for the required depth.

Frost line depth in every state

Retaining wall permits in Mississippi

Permit exemption: Set locally
Who decides: Your city or county decides which IRC edition and permit rules apply.
Good to know: Cities and counties must use one of the three most recent IRC editions unless they opted out when the law passed. Check with your city or county building department.

Retaining wall permit rules in every state

811 dig law in Mississippi

One-call center: Mississippi 811, Inc.
Notice before digging: Not less than 3 and not more than 10 working days before excavation (submerged work: 7 working days)
Ticket good for: 20 calendar days from the date and time the ticket is processed; renew 3-4 working days before expiration
Hand-dig zone: 18 in. plus one-half the facility diameter, measured horizontally from the outside edge of the marks
Homeowners: Partial exemption: 'excavation' excludes hand-only digging by a property owner on private property to less than 12 in., agricultural tilling under 24 in., and driving wooden stakes by hand to 6 in. or less. Anything deeper or with machinery requires a call.
The law: Miss. Code Ann. § 77-13-1 et seq.
Good to know: A working day is a rolling 24-hour period from when the ticket is processed, not counting weekends and holidays. Renew your ticket 3 to 4 working days before it expires.

811 dig laws in every state

Drainage law and stormwater permits in Mississippi

Rule: Reasonable use
The rule: Reasonable use: an upper landowner may not unreasonably alter natural drainage patterns to the detriment of the lower neighbor; anyone who diverts water must use reasonable care to prevent unnecessary injury. (Label assigned from the 'unreasonably alter' test; the court does not name a doctrine.)
Leading case: Martin v. Flanagan, LLC. Miss. S. Ct. No. 2001-CA-00300-SCT (May 23, 2002); quoting Hall v. Wood, 443 So. 2d 834 (Miss. 1983)
What it means for your yard: You can use and develop your land reasonably, but if your regrading, downspouts or patio unreasonably change natural drainage and hurt the neighbor below, you can be liable.
Construction stormwater permit: Mississippi Department of Environmental Quality (MDEQ): 1 acre or more: Small Construction General Permit for 1 to less than 5 acres; Large Construction General Permit (LCNOI) for 5 acres or more
State rules below 1 acre: No statewide rule below the 1-acre permit found; check your county and town.
Local rules: Mississippi cities and counties may have their own grading, drainage and stormwater ordinances.
Good to know: Mississippi courts ask whether an upper landowner unreasonably changed natural drainage to the harm of the neighbor below. State construction stormwater coverage starts at 1 acre.

Drainage laws in every state

Contractor licensing in Mississippi

Statewide rule: License
Agency: Mississippi State Board of Contractors (MSBOC)
Who needs it: Remodelers improving an existing residence need a state license when the job exceeds $10,000; residential builders need one when it exceeds $50,000.
When it applies: Remodeling existing homes over $10,000; new residential construction over $50,000
Check a contractor: Official lookup
Good to know: Thresholds are set in Miss. Code 73-59-1, last amended in 2022. You may see an older $15,000 remodeling figure from a 2017 board warning; the current statute uses $10,000.

Contractor license requirements in every state

Contractor deposits and your right to cancel in Mississippi

Deposit limit: No statewide cap.
Right to cancel: Home solicitation sales: the buyer may cancel until midnight of the third business day after signing (Miss. Code § 75-66-3). No cancel right if the buyer requested immediate emergency work and the seller substantially began in good faith.
The law: Miss. Code §§ 75-66-1 et seq. (Home Solicitation Sales)
Good to know: Mississippi's 3-day cancel right doesn't apply if you asked for emergency work and the contractor has already started in good faith.

Contractor deposit limits in every state

Mechanics lien deadlines in Mississippi

Lien deadline (prime): Record the claim of lien with the chancery clerk within 90 days after the claimant's last work or materials, and send the owner a copy within 2 business days after filing (Miss. Code § 85-7-405).
Lien deadline (sub/supplier): Same as prime, with a copy to the contractor; on single-family residential, only after the 10-day pre-lien notice (Miss. Code §§ 85-7-405, 85-7-409).
Preliminary notice (sub/supplier): Single-family residential: subs, suppliers and design professionals not in privity with the owner must give the owner a written pre-lien notice (statutory form) at least 10 days before filing a claim of lien; it is a condition precedent (Miss. Code § 85-7-409(2)-(3)).
Notice of intent: Single-family residential: the 10-day pre-lien notice above. Otherwise not required.
Enforce within: Payment action within 180 days after filing the claim of lien, with a lis pendens (Miss. Code § 85-7-405).
Homeowner rules: On single-family residential work, the owner's payment to the contractor is a complete defense to sub and supplier liens, to the extent paid before the owner received a pre-lien notice (Miss. Code § 85-7-409(1)).
The law: Miss. Code Title 85, Ch. 7, Art. 21 (Special Liens on Real Estate), §§ 85-7-401 to 85-7-433
Good to know: On a Mississippi single-family home, subcontractors and suppliers must send the owner a pre-lien notice at least 10 days before filing, and a homeowner who paid the contractor before getting it is protected.

Mechanics lien deadlines in every state

Workers' comp requirements in Mississippi

Who must carry it: Employers with 5 or more workers regularly in the same business must carry coverage; employers with fewer may opt in (Mississippi WCC fact sheet; Miss. Code § 71-3-5). Domestic servants, farmers and farm labor are excluded unless voluntarily covered. No separate construction threshold.
Owners and officers: By written action of its governing authority, and with the person's written agreement, an employer may exempt its sole proprietor, a partner, or an employee owning 15% or more of the corporate stock; an exempt person doesn't count toward the 5-worker threshold (Miss. Code § 71-3-5, 2023 text via Justia).
Subcontractors: The Commission's fact sheet says employees of subcontractors get special protection under the law (Mississippi WCC). Under Miss. Code § 71-3-7, employees of an uninsured subcontractor are treated as employees of the general contractor; this applies only where there is a general contract, so a mere premises owner does not qualify (per ALFA International compendium, secondary).
Homeowners: Domestic servants are excluded unless voluntarily covered (Miss. Code § 71-3-5). A premises owner who is not a general contractor is not made the employer of an uninsured sub's workers under § 71-3-7 (per ALFA International compendium, secondary).
Penalties: Failing to secure required coverage is a misdemeanor punishable by a fine of up to $1,000, up to 1 year in jail, or both; a corporation's president, secretary and treasurer face the same penalty and are personally liable, with the corporation, for benefits owed; the Commission can also impose a civil penalty of up to $10,000 (Miss. Code § 71-3-83, 2023 text via Justia).
The law: Miss. Code Title 71, Ch. 3; §§ 71-3-5, 71-3-7, 71-3-83
State agency: Mississippi Workers' Compensation Commission
Good to know: Mississippi requires coverage once you have 5 or more regular employees. Going without required coverage is a misdemeanor, and corporate officers can be personally liable.

Workers' comp requirements in every state

Planting zones in Mississippi

2023 USDA zones: 7b to 9a
Coldest-night range: 5°F to 25°F
Coldest area: Northeast corner (Marshall, Benton, Tippah, Alcorn and Tishomingo counties)
Warmest area: The three coastal counties plus Pearl River and Stone counties
Example cities: Jackson: 8b, Gulfport: 9a, Hattiesburg: 8b, Tupelo: 8a
Local plant advice: Mississippi State University Extension
Good to know: Mississippi's warmer zones grew on the 2023 map: 8b now covers about half the state, 9a spread from the tip of the coast to all three coastal counties plus Pearl River and Stone, and 7b shrank to a few northeastern counties.

Planting zones in every state

Frost dates in Mississippi

Station	Last spring frost	First fall frost	Frost-free days
Jackson Central Mississippi	March 14	November 14	245
Tupelo Northeast Mississippi	March 21	November 10	235
Meridian East-central Mississippi	March 16	November 12	239
Gulfport-Biloxi Gulf Coast	February 23	December 3	287

Typical range: Last frost late Feb (Gulfport-Biloxi) to late Mar (Tupelo); first frost early Nov (Tupelo) to early Dec (Gulfport-Biloxi)
Good to know: These are typical (50%) dates from NOAA's 1991–2020 climate normals, so about half of years still bring a 32°F night after the listed spring date. In Mississippi, the last spring frost at the stations listed ranges from late February around Gulfport-Biloxi to late March around Tupelo.
Local frost or planting guide: Mississippi State University Extension Service

Frost dates in every state

Frequently Asked Questions

What building code does Mississippi use?

Codes adopted by the Mississippi Building Codes Council; cities and counties that did not opt out in 2014 must use one of the three most recent IRC editions, and coastal counties must enforce the state code. It applies as follows: statewide, but municipalities can opt out. Your local building department can confirm the edition and amendments for your address.

How deep is the frost line in Mississippi?

Frost depth is set by local building departments. Footings for houses, additions and attached decks go below it.

How much can a contractor ask for up front in Mississippi?

No statewide cap. Cancel rights: Home solicitation sales: the buyer may cancel until midnight of the third business day after signing (Miss. Code § 75-66-3). No cancel right if the buyer requested immediate emergency work and the seller substantially began in good faith.

How long does a contractor have to file a mechanics lien in Mississippi?

Record the claim of lien with the chancery clerk within 90 days after the claimant’s last work or materials, and send the owner a copy within 2 business days after filing (Miss. Code § 85-7-405). Subcontractors and suppliers may have different notice rules; see the section above.

What planting zone is Mississippi?

On the 2023 USDA map, Mississippi runs from zone 7b to 9a. Examples: Jackson 8b, Gulfport 9a, Hattiesburg 8b. Enter your ZIP on the USDA map for your exact zone.

Do contractors need workers' comp in Mississippi?

Employers with 5 or more workers regularly in the same business must carry coverage; employers with fewer may opt in (Mississippi WCC fact sheet; Miss. Code § 71-3-5). Domestic servants, farmers and farm labor are excluded unless voluntarily covered. No separate construction threshold. Owner exemptions and subcontractor rules are in the workers’ comp section above.

When is the last frost in Mississippi?

At the NOAA stations we list: Last frost late Feb (Gulfport-Biloxi) to late Mar (Tupelo); first frost early Nov (Tupelo) to early Dec (Gulfport-Biloxi). These are typical (50%) dates from the 1991–2020 climate normals, so about half of years still bring a 32°F night after the spring date.

This page is general information, not legal or tax advice. Rules change; the agencies and statutes linked above have the final word.

Mississippi in each 50-state guide: Frost line depth · 811 dig laws · Retaining wall permits · Contractor licensing · Contractor deposit limits · Building codes · Planting zones · Mechanics lien deadlines · Workers' comp · Frost dates · Drainage laws · Noxious weed laws · Rainfall and snowfall · Landscaper pay · Pesticide applicator licensing · Landscaping sales tax · All state guides

Last checked October 31 and November 1, 2026 against official state and local sources for this state. Rules change; your state agency or local building department has the final word. Spot something out of date? Email info@muthlerlandscaping.com and we’ll fix it.

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Cite as: Muthler Landscaping & Construction, “Mississippi Building Codes, Permits and Contractor Rules,” https://muthlerlandscaping.com/state-guides/mississippi/ (last checked November 9, 2026).

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