COR
MSBOC · COMMERCIAL
Verify / Learn More ↗Certificate of Responsibility
Official name for a Mississippi commercial contractor license. Verify active status plus the listed classification.
Mississippi contractor intelligence
Mississippi Contractor License & Trade Guide
Mississippi is classification-driven, not prefix-driven. The Mississippi State Board of Contractors (MSBOC) administers commercial and residential contractor licensing, with commercial licenses formally called a Certificate of Responsibility (COR). Route opportunities by active status, license type and the exact MSBOC classification that matches the work.
Source-based build · verify live MSBOC status and exact classification before relying on a contractor credential
Commercial threshold$50K
Supplied-source threshold for covered commercial work.
Residential new build$50K
Supplied-source threshold for new residential construction.
Remodel / addition$10K
Supplied-source residential remodel/addition threshold.
Residential roofing$10K
Supplied-source residential roofing threshold.
01 · Licensing model
How Mississippi Actually Licenses Contractors
Mississippi contractor licensing is centered on MSBOC classifications. The most important operational rule is to match the active license to the exact classification—not to infer scope from a letter prefix.
Mississippi is a classification-first state.
Commercial: MSBOC calls the commercial contractor license a Certificate of Responsibility. Major commercial classes include Building Construction, Electrical, Highway/Street/Bridge, Heavy Construction, Mechanical, and Municipal/Public Works.
Residential: MSBOC separately identifies Residential Builder, Construction Manager, Electrical, HVAC, Mechanical, Plumbing, Remodeler, Roofer and Solar classifications.
Verification: the supplied source says MSBOC license-number searches use numbers only and that normalized labels such as COR, BC, ELEC and MECH are routing aids rather than embedded license-number prefixes.
Pair Mississippi permit activity with the exact MSBOC classification most likely to perform the work.
Get Started for FreeSee the 20 Data Points02 · Core licenses
Codes That Shape the Mississippi Market
These are normalized routing labels for high-value Mississippi license and classification families. They are not asserted to be prefixes embedded in the MSBOC license number.
BC
MSBOC · MAJOR
Verify / Learn More ↗Building Construction
Major commercial classification for commercial buildings and covered residential structures, additions, alterations and renovations.
ELEC
MSBOC · MAJOR
Verify / Learn More ↗Electrical
Major commercial classification for electrical wiring, fixtures, raceways, conduit and electrical systems.
MECH
MSBOC · MAJOR
Verify / Learn More ↗Mechanical
Major commercial classification spanning heating, cooling, refrigeration, equipment piping, ductwork and plumbing-related systems within its scope.
MPW
MSBOC · MAJOR
Verify / Learn More ↗Municipal & Public Works
Major classification for water/sewer pipelines and plants, storm drains, associated excavation, grading and paving.
RB
MSBOC · RESIDENTIAL
Verify / Learn More ↗Residential Builder
Residential building classification for covered residential construction, remodeling, repair and improvement.
RRF
MSBOC · RESIDENTIAL
Verify / Learn More ↗Residential Roofer
Residential classification limited to rooftop structures, roof coverings and roof drainage work.
FSW
MSBOC · STAND-ALONE
Verify / Learn More ↗Fire Sprinkler Work
Stand-alone classification for fire sprinkler and suppression systems; source notes NICET and possible State Fire Marshal requirements.
Route Mississippi permit activity to contractors with the matching active classification.
Get Started for FreeSee the 20 Data Points03 · Trade routing
Mississippi Trade Routing Guide
Use the exact classification that matches the permit scope. The source distinguishes major commercial classes, residential classes, specialties and stand-alone classifications.
COR / BCCommercial · buildingCommercial Building+
License / routing rule
Use an active COR with Building Construction when the project is commercial building construction within that classification.
Permit signals
New commercial buildings, additions, conversions, renovations and major tenant improvements.
Verify through
MSBOC contractor search + classification listing.
TigerLeads use
Route major building permits to active contractors whose classification matches the work.
RBResidential · builderResidential Builder+
License / routing rule
Use for covered residential building activity; the source describes scope across residential construction, remodeling, repair and improvement.
Permit signals
New homes and larger residential additions.
Verify through
MSBOC residential classifications.
TigerLeads use
Use valuation and project type to distinguish new-build from remodel demand.
RR / RRFResidential · remodel / roofResidential Remodeler & Roofer+
License / routing rule
RR routes residential remodel/repair/improvement; RRF is limited to residential rooftop structures, coverings and drainage.
Permit signals
Residential remodel, addition and roof permits.
Verify through
MSBOC residential classifications.
TigerLeads use
Separate roofing opportunities from broader remodel work.
ELEC / REElectricalCommercial & Residential Electrical+
License / routing rule
ELEC is the major commercial electrical classification; RE is the residential electrical classification.
Permit signals
Service upgrades, wiring, new-building electrical, residential electrical permits.
Verify through
MSBOC classifications + contractor search.
TigerLeads use
Match commercial vs. residential scope before routing.
ALARM / LVElectrical specialtyAlarm & Low Voltage+
License / routing rule
Use the named specialty classification for alarm/security or communication/low-voltage work; do not substitute the broad ELEC label when the source gives a narrower class.
Permit signals
Alarm, access control, fire detection, data/communications and low-voltage permits.
Verify through
MSBOC classifications.
TigerLeads use
Useful for specialty contractors often missed by broad GC outreach.
MECH / HVACMechanicalMechanical & HVAC+
License / routing rule
MECH is the broad commercial mechanical major; HVAC is a specialty classification for heating, ventilation and A/C systems.
Permit signals
HVAC replacements, new mechanical systems, ductwork and commercial equipment.
Verify through
MSBOC mechanical classifications.
TigerLeads use
Route from the permit description to the narrowest matching mechanical classification.
PLMB / RPPlumbingCommercial / Residential Plumbing+
License / routing rule
PLMB is the named plumbing specialty; RP is the residential plumbing classification.
Permit signals
Plumbing, water supply, drainage, venting, irrigation, medical gas and residential plumbing permits within source scope.
Verify through
MSBOC classifications.
TigerLeads use
Separate residential plumbing from broader commercial plumbing demand.
HC / HSBInfrastructureHeavy / Highway-Street-Bridge+
License / routing rule
Use HC for heavy construction and HSB for highway, street, bridge and related public-way work.
Permit signals
Roads, bridges, grading, pipelines, excavation and major civil permits.
Verify through
MSBOC classifications.
TigerLeads use
Route infrastructure signals by exact civil scope.
MPWPublic worksMunicipal & Public Works+
License / routing rule
Use for water/sewer pipelines and plants, storm drains and associated public-works excavation, grading and paving.
Permit signals
Water, sewer, utility and municipal infrastructure permits.
Verify through
MSBOC classifications.
TigerLeads use
Strong signal for civil contractors, utility subs and suppliers.
FSWFire protectionFire Sprinkler Work+
License / routing rule
Stand-alone MSBOC classification for fire sprinkler and suppression systems; source notes additional certification/agency requirements may apply.
Permit signals
Fire sprinkler installation, alteration and suppression-system permits.
Verify through
MSBOC + any additional agency requirement shown by the state.
TigerLeads use
Keep life-safety work separate from ordinary plumbing or mechanical routing.
SWC / RSSolarCommercial / Residential Solar+
License / routing rule
SWC is the stand-alone Solar and Wind Construction classification; RS is Residential Solar. Electrical or mechanical connections may require the appropriate related classification.
Permit signals
PV, solar, renewable-energy and residential solar permits.
Verify through
MSBOC classifications.
TigerLeads use
Route solar leads by project type and connection scope.
LSSLimited specialtyLimited Specialty Services+
License / routing rule
Use when work over $50,000 is not specifically defined under another classification in the supplied source.
Permit signals
Unusual specialty construction, modular structures, access flooring, bleachers, precast and similar scopes.
Verify through
MSBOC classifications.
TigerLeads use
Treat as an exception class and verify exact scope before routing.
Turn Mississippi permit descriptions into the right trade audience before competitors react.
Get Started for FreeSee the 20 Data Points04 · Classification directory
Mississippi Classification & Routing Directory
Searchable directory of major classes, residential classes, specialties and normalized routing labels from the supplied source. A label is not proof of current licensure.
COR
Commercial Certificate of Responsibility
Official commercial contractor license name.
BC
Building Construction
Commercial major classification.
ELEC
Electrical
Commercial major classification.
HSB
Highway, Street & Bridge Construction
Commercial major classification.
HC
Heavy Construction
Commercial major classification.
MECH
Mechanical
Commercial major classification.
MPW
Municipal & Public Works
Commercial major classification.
RB
Residential Builder
Residential construction classification.
RCM
Residential Construction Manager
Residential construction-management classification.
RE
Residential Electrical
Residential electrical classification.
RHVAC
Residential HVAC
Residential HVAC classification.
RMEC
Residential Mechanical
Residential mechanical classification.
RP
Residential Plumbing
Residential plumbing classification.
RR
Residential Remodeler
Residential remodeling classification.
RRF
Residential Roofer
Residential roofing classification.
RS
Residential Solar
Residential solar classification.
ALARM
Alarm / Access / Security Equipment
Electrical specialty classification.
LV
Communication / Low Voltage Electrical
Low-voltage specialty classification.
TEL
Telecommunications
Telecommunications specialty classification.
TC-E
Traffic Control — Electrical
Electrical traffic-control specialty.
TDL
Transmission & Distribution Lines
Outside electrical transmission specialty.
HVAC
Heat, Ventilation, A/C
Mechanical specialty classification.
DUCT
Ductwork
Heating/A-C/ventilation ductwork specialty.
PLMB
Plumbing
Commercial/residential plumbing specialty.
PROC
Process Piping
Process-piping specialty.
REF
Refrigeration
Commercial/industrial refrigeration specialty.
BOIL
Boiler Installation & Repair
Boiler specialty classification.
FSW
Fire Sprinkler Work
Stand-alone fire-sprinkler classification.
SWC
Solar & Wind Construction
Stand-alone renewable-energy classification.
LSS
Limited Specialty Services
Stand-alone limited specialty category.
ROOF
Roofing / Sheet Metal / Siding
Building specialty routed under BC in source.
GLASS
Glass / Glazing / Windows / Skylights
Building specialty routed under BC in source.
FLOOR
Floor Covering
Building specialty routed under BC in source.
PAINT
Painting
Building specialty routed under BC in source.
CONC
Concrete
Building / civil specialty appearing in source.
DEMO
Demolition
Building specialty routed under BC in source.
05 · Permit intelligence
Permit Signals Worth Watching in Mississippi
Licensing identifies who may perform the work. Permit records identify where likely demand is forming. Combine both without implying that a permit is an open bid.
New commercial building
COR · BC · ELEC · MECH
Building + electrical + mechanical + plumbing specialties
HIGHStrong multi-trade construction signal.
New residential building
RB · RE · RHVAC / RMEC · RP
Residential builder + licensed residential trades
HIGHMajor residential demand signal above applicable thresholds.
Residential remodel / addition
RR · RB
Remodeler / builder plus specialty trades
HIGHThreshold-sensitive residential renovation signal.
Residential roof permit
RRF · ROOF
Residential roofer + roofing material demand
HIGHStrong replacement/repair and supplier signal.
Electrical / low-voltage permit
ELEC · RE · LV · ALARM
Electrical and specialty contractors
HIGHRoute by commercial/residential and specialty scope.
Mechanical / HVAC / plumbing permit
MECH · HVAC · PLMB · RHVAC · RP
Mechanical, HVAC and plumbing contractors
HIGHUse exact classification text when scope is narrow.
Public works / utility permit
HC · HSB · MPW
Civil, highway, utility and municipal contractors
HIGHStrong infrastructure contractor and supplier signal.
Fire sprinkler / solar / specialty
FSW · SWC · RS · LSS
Stand-alone and limited specialty contractors
MEDIUMCheck additional agency or connection requirements before routing.
Use Mississippi permit activity to reach contractors, trades and suppliers while the project is still developing.
Get Started for FreeSee the 20 Data Points06 · Verification workflow
Verify Mississippi Before You Route
Mississippi is straightforward only if you preserve classification granularity. Do not parse normalized acronyms from a license number.
01
Identify project type and value
Start with commercial vs. residential work and compare valuation with the $50,000 and $10,000 thresholds stated in the supplied source.
02
Match the exact MSBOC classification
Confirm active status and verify that the listed classification matches the work described by the permit.
03
Check specialty or added requirements
Fire sprinkler, solar connections and some specialty categories can involve additional classification or agency requirements noted in the source.
04
Use permit data as a signal
Permit scope, valuation, address, contractor and dates can indicate likely demand, but not bidding status or guaranteed opportunity.
See how TigerLeads turns permit records into structured opportunity intelligence.
Get Started for FreeSee the 20 Data Points07 · Official sources
Official Mississippi Sources
Use the MSBOC record and governing source—not a third-party directory—as the final classification and status check.
01MSBOC ClassificationsOfficial commercial, residential and specialty classification directory↗02MSBOC License SearchOfficial contractor verification search↗03MSBOC FAQsThreshold and licensing guidance used by the supplied source↗04MSBOC One Stop ShopOfficial licensing guidance and commercial COR terminology↗05MSBOC LawsBoard laws and public-works/building-official resources↗06Miss. Code §31-3-1Commercial contractor definitions cited by source↗07Miss. Code Title 31, Chapter 3Commercial contractor licensing chapter cited by source↗08Miss. Code §73-59-3Residential license requirement cited by source↗09Miss. Code Title 73, Chapter 59Residential builders and remodelers chapter cited by source↗10MSBOC Residential ClassificationsOfficial residential classification section↗11MSBOC Search — Classification CheckUse active status and exact classification before routing↗12TigerLeads Permit Data PointsHow permit fields become opportunity intelligence↗
08 · FAQ
Mississippi Contractor Licensing Questions
Answers below are based on the supplied Mississippi source and should be re-verified against live MSBOC records when used operationally.
01Does Mississippi use official contractor license prefixes?+
The supplied source says Mississippi is classification-driven, not prefix-driven. Normalized acronyms on the page are routing labels.
02What does COR mean?+
Certificate of Responsibility, the official name for a Mississippi commercial contractor license in the supplied source.
03When is commercial contractor licensing generally required?+
The supplied source states contractors and subcontractors performing commercial work over $50,000 need a commercial license.
04What are the six major commercial classifications?+
Building Construction, Electrical, Highway/Street/Bridge, Heavy Construction, Mechanical, and Municipal/Public Works.
05What does BC mean on this page?+
A normalized routing label for the MSBOC Building Construction classification, not an asserted license-number prefix.
06When is a residential builder license generally required?+
The source states new residential construction over $50,000 generally requires licensing.
07When does residential remodeling or an addition trigger licensing?+
The source states residential remodeling or additions over $10,000 generally require the applicable license.
08When does residential roofing trigger licensing?+
The source states residential roofing over $10,000 generally requires the applicable license.
09What is RB?+
A normalized routing label for Residential Builder.
10What is RR?+
A normalized routing label for Residential Remodeler.
11What is RRF?+
A normalized routing label for Residential Roofer.
12How should electrical work be routed?+
Match commercial ELEC or Residential Electrical and use narrower specialties such as low voltage or alarm systems when the source classification fits.
13How should HVAC and mechanical work be routed?+
Use MECH for the broad commercial major classification and the exact HVAC, ductwork, refrigeration or residential classification when narrower scope applies.
14How should plumbing be routed?+
Use the named Plumbing specialty for commercial/general scope or Residential Plumbing for residential-only scope as appropriate.
15What is FSW?+
A normalized label for the stand-alone Fire Sprinkler Work classification; the source notes additional certification or State Fire Marshal requirements may apply.
16What is SWC?+
A normalized label for Solar and Wind Construction; the source says electrical or mechanical connections require the appropriate related classification.
17How do I verify a Mississippi contractor?+
Use official MSBOC search, confirm active status and match the exact listed classification to the project scope. For license-number search, the source says enter numbers only.
18How should Mississippi permits be used in TigerLeads?+
As project signals that can indicate likely upcoming work; they are not proof of an open bid or guaranteed job.
Turn Mississippi Permits Into Earlier Opportunities.
TigerLeads helps contractors, trades and suppliers identify permit-driven project signals, understand likely scope and reach the market earlier.
