Building permit glossary
The words on permit forms, plan comments and zoning codes, in plain English. Each entry says where the term shows up, what reviewers ask for, where to get it, and what to do next.
55 terms · 8 topics
Read the lot
The words on a site plan, on a site plan
Most zoning comments point at one of these. Pick a part of this sample lot to see what it means.
Pick a part of the lot
55 terms
Find by topic
A
Accessory Building / Accessory Structure
Also called outbuilding, utility building, storage building
A subordinate structure on the same lot as the principal building, such as a shed or detached garage.
Project example
A backyard workshop may be classified as an accessory structure only while it remains subordinate to the house and is used in a way the zoning district allows.
Lot and zoning
AFCI Protection
Also called AFCI breaker, arc-fault protection
Arc-fault circuit-interrupter protection designed to reduce fire risk from dangerous electrical arcing.
Project example
A bedroom remodel that adds or extends circuits may require AFCI protection under the adopted electrical code.
Projects and trades
After-the-Fact Permit
Also called retroactive permit, as-built permit, permit legalization
A permit requested after work has already been built or installed without the required approval.
Project example
A homeowner who enclosed a porch without a permit may need drawings, exposed work, and a field inspection before the AHJ can legalize it.
Problems and enforcement
Anchoring / Anchorage
Also called tie down, hold down, anchor bolts
Methods used to secure a structure against wind and movement.
Shed anchors · elevationType set by code Project example
A manufactured shed may need an approved ground-anchor layout tied to the model, soil condition, and local wind exposure rather than a generic anchor note.
Building code and structure
Asbestos Abatement
Also called asbestos survey, hazardous-material abatement
The controlled identification, containment, removal, or disposal of asbestos-containing material before or during demolition or renovation.
Project example
Before demolishing an older attached garage or removing finishes, the project may need a hazardous-material survey and licensed abatement.
Projects and trades
Authority Having Jurisdiction (AHJ)
Also called building department, municipality, jurisdiction, permitting authority
The local authority that administers and enforces codes for a project address.
Project example
A property with a village mailing address may sit outside village limits, leaving the county or township responsible for building review while another office handles zoning or septic.
Permits and process
B
Building Envelope
Also called buildable area, build box
The portion of a lot remaining after required setbacks where a structure may be placed.
Project example
An addition plan must coordinate wall insulation, air sealing, flashing, roof transitions, windows, and foundation insulation so the new conditioned space performs as one enclosure.
Building code and structure
C
Certificate of Occupancy (CO)
Also called C of O, occupancy certificate, TCO
Approval that a building is safe for use. For accessory work, a final approval closes the permit.
Project example
A new dwelling cannot be occupied merely because construction looks finished; the AHJ may require final trade approvals, address numbers, grading, life-safety items, and outstanding fees first.
Inspections and closeout
Combustion Air
Also called combustion ventilation, makeup air
The air supply needed for fuel-burning equipment to operate safely and vent combustion products.
Project example
Replacing a furnace in a tight utility room may require a documented combustion-air path or a different equipment configuration.
Projects and trades
Conditional Use
Also called special use permit, CUP
A use allowed by special approval within a zoning district.
Project example
A home-based business may be listed as a conditional use, requiring evidence about parking, hours, deliveries, employees, and neighborhood effects before approval.
Lot and zoning
Construction Drawings
Also called building plans, permit drawings, plan set, architectural drawings
The plans, elevations, sections, details, and specifications that explain what will be built and how the work fits together.
Project example
A detached garage plan set may include a floor plan, four exterior elevations, a building section, foundation details, framing information, and connection details.
Plans and records
D
Deck Ledger
Also called ledger board, deck attachment
The structural board that attaches a deck to a building and transfers deck loads into the supporting structure.
Project example
A deck attached to a house needs ledger fasteners, flashing, and clearances that match the approved plans and local code.
Projects and trades
Detached Garage
Also called private garage, accessory garage
A vehicle storage building separate from the principal building, typically used by occupants of the premises.
Project example
A proposed two-car garage may fit physically behind the house but still need a larger setback, fire-separation details, engineered foundations, and a driveway connection approved by the municipality.
Projects and trades
Driveway / Apron
Also called driveway approach, apron
The paved transition area between a private drive and the public street.
Driveway apron · planNot to scale Project example
A homeowner widening a driveway may need the apron redesigned so it crosses the sidewalk at the required slope without interfering with drainage or a street tree.
Water, utilities and right of way
E
Easement
Also called utility easement, right of way
A limited right to use another's land for a specific purpose such as utilities, drainage, or access.
Rear utility easement · planNot to scale Project example
A rear-yard garage may meet the zoning setback and still conflict with a utility easement that reserves the same strip for underground service access.
Lot and zoning
Egress
Also called emergency escape and rescue opening, means of egress
A code-compliant way for occupants to escape and for emergency responders to enter, commonly measured by a bedroom window or door opening.
Project example
Converting a basement room into a bedroom may require an egress window with a compliant clear opening, well, ladder, and drainage.
Building code and structure
F
Fence Height
Also called fence elevation, maximum fence height
The measured vertical height of a fence, which may differ by front, side, and rear yard or by corner-lot visibility rules.
Project example
A six-foot privacy fence that is allowed in a rear yard may need a shorter design near the front setback or driveway sight triangle.
Projects and trades
Final Inspection
Also called final approval, closeout inspection
The last inspection confirming that permitted work is complete, safe, and consistent with the approved scope.
Project example
After a furnace replacement, the final inspection may verify venting, gas connections, electrical disconnects, and the installed equipment.
Inspections and closeout
Floodplain
Also called SFHA, flood zone, base flood elevation area
Land subject to flooding per FEMA maps. Floodplain areas often require additional review.
Floodplain · sectionFreeboard set locally Project example
A detached garage inside a mapped floodplain may need elevation data, flood-resistant materials, anchoring, and limits on enclosure below the required flood elevation.
Water, utilities and right of way
Floodway
Also called regulatory floodway, designated floodway, flood conveyance area
The stream channel and the adjoining land reserved to carry the base flood without raising the water surface. It sits inside the floodplain and is the most restricted part of it, so construction there faces limits that do not apply to the wider flood fringe.
Project example
Placing fill or a structure in a regulatory floodway may be prohibited or require hydraulic analysis showing that the project will not raise flood levels.
Water, utilities and right of way
Footing / Foundation
Also called spread footing, slab foundation, stem wall
Subsurface supports that transfer building loads to the soil.
Project example
A detached garage plan may require a thickened-edge slab, continuous frost footing, or engineered foundation depending on size, soil, climate, and local amendments.
Building code and structure
Frost Depth
Also called frost line, frost penetration depth
Minimum depth below grade to place footings to avoid frost heave.
Project example
Deck posts that stop above the locally required frost depth can move during freeze-thaw cycles and fail the footing inspection even if the deck framing is otherwise correct.
Building code and structure
G
GFCI Protection
Also called GFCI outlet, ground-fault protection
Ground-fault circuit-interrupter protection that quickly disconnects power when electricity may be flowing through an unintended path.
Project example
A new garage receptacle or exterior outlet may need GFCI protection at the outlet or upstream device, depending on local code.
Projects and trades
H
Height (Building or Fence)
Also called overall height, eave height
Vertical measurement per local code, often defined to midpoint or ridge.
Measuring height · elevationNot to scale Project example
A garage with a steep roof may exceed the accessory-building height limit depending on whether the ordinance measures to the peak, midpoint, or average grade.
Lot and zoning
I
Ice and Water Shield
Also called ice barrier, peel-and-stick underlayment
A self-adhering roofing membrane used in vulnerable areas to resist water intrusion from ice dams and wind-driven rain.
Project example
A roof replacement plan may call for ice barrier at eaves, valleys, or other locations defined by the adopted code and local conditions.
Projects and trades
Impervious Area Calculation
Also called impervious coverage, stormwater area calculation
A calculation of how much of a lot is covered by surfaces that prevent water from soaking into the ground.
Project example
A new concrete patio plus a carport roof may push a lot over its impervious-area limit even if each piece is separately small.
Lot and zoning
Impervious Surface
Also called impervious area, hardscape
Surface that prevents water infiltration, such as roofs, asphalt, or concrete.
Project example
Replacing gravel with concrete and adding a patio can increase impervious area even though no enclosed building space is added.
Lot and zoning
Inspections
Also called inspection sequence, final walkthrough
Official checks for compliance at key stages such as footing, rough framing, and final.
Project example
A remodel may need framing, rough electrical, rough plumbing, insulation, and final inspections in an order that keeps each system visible to the inspector.
Inspections and closeout
L
Load-Bearing Wall
Also called bearing wall, structural wall
A wall that carries weight from floors, roofs, or other structure down to the foundation.
Project example
Removing a wall to open a kitchen may require a beam, posts, structural calculations, and an updated plan set.
Building code and structure
Lot / Parcel
Also called property, tax parcel, lot of record
A unit of land described on a plat or by legal description.
Project example
Two tax parcels used as one backyard are not always one zoning lot; an addition may require a lot consolidation before staff can calculate setbacks and coverage correctly.
Lot and zoning
Lot Coverage
Also called building coverage, impervious coverage
The portion of the lot covered by buildings or roofs. Some jurisdictions include other impervious areas.
Project example
A garage may meet every setback but push the combined house, garage, porch, and roofed accessory area over the district's maximum lot-coverage percentage.
Lot and zoning
N
Nonconforming
Also called legal nonconforming, grandfathered
A lawful use or structure that no longer meets current code requirements.
Nonconforming house · planLimits set locally Project example
An old garage inside today's setback may remain lawful, but replacing, enlarging, or changing it can trigger limits on expanding a nonconforming structure.
Lot and zoning
P
Permit
Also called building permit, construction permit, permit application
Formal authorization to construct, alter, move, or demolish a structure. It confirms the work meets local code and zoning requirements.
Project example
A detached garage may need zoning approval for placement, a building permit for the structure, and separate electrical approval if power is added.
Permits and process
Permit Expiration
Also called expired permit, permit lapse, inactive permit
The point at which a permit is no longer active under the AHJ's time limits, often because work did not start or inspections were not kept current.
Project example
A roof permit left open after the contractor stops work may need an extension or reactivation before the next inspection.
Problems and enforcement
Permit Fee
Also called permit cost, plan review fee, inspection fee
A charge assessed by the AHJ for application intake, plan review, inspections, or related approvals.
Project example
A contractor estimating a water-heater replacement should separate the local permit fee from labor, materials, and any reinspection charge.
Permits and process
Plan Review
Also called permit review, building plan review, desk review
The desk review in which an AHJ checks drawings, forms, calculations, and supporting documents before issuing a permit.
Project example
A garage packet may be returned because the site plan shows a different setback than the architectural plan.
Permits and process
Plat of Survey
Also called survey, boundary survey
A surveyor-prepared drawing that documents lot boundaries, existing structures, and easements.
Plat of survey · sampleNot to scale Project example
A homeowner may find a survey in the closing packet, but a later patio or addition can make its existing-conditions layer incomplete for a new permit.
Plans and records
Principal Building
Also called main building, primary structure
The building that houses the primary use of the lot.
Project example
A shed may not be allowed on a vacant residential lot because the ordinance requires a principal dwelling before accessory structures can be established.
Lot and zoning
R
Refrigerant Line Set
Also called line set, refrigerant piping
The insulated copper tubing that carries refrigerant between an outdoor condenser and an indoor HVAC coil or head.
Project example
A mini-split installation routes the line set through the wall, protects the penetration, and connects it to the outdoor condenser.
Projects and trades
Resubmittal
Also called permit revision, correction response, recheck, revised submittal
A revised permit package returned to the AHJ after reviewers request corrections, clarification, or additional documents.
Project example
A deck resubmittal may include a response letter, a revised site plan with missing setbacks, and updated framing sheets carrying the same revision date.
Permits and process
Right of Way (ROW) Permit
Also called street opening permit, excavation permit, curb cut permit
Authorization to work in public right of way such as streets, sidewalks, or parkways.
Right of way · street sectionNot to scale Project example
A new driveway may need a building or zoning approval on private property and a separate right-of-way permit for the apron, curb cut, or sidewalk work.
Water, utilities and right of way
Rough-In Inspection
Also called rough inspection, pre-cover inspection
An inspection of concealed work such as wiring, plumbing, ducts, or framing before walls and ceilings are closed.
Project example
A basement remodel can schedule electrical and plumbing rough-ins before drywall hides the new circuits and drain lines.
Inspections and closeout
S
Septic System
Also called OWTS, onsite septic, drainfield
Onsite wastewater treatment system that includes a tank and drainfield.
Septic system · sectionDistances set by code Project example
A detached garage may need county health review when its footprint or driveway approaches the septic tank, drainfield, or reserved replacement area.
Water, utilities and right of way
Setback / Building Line
Also called yard setback, building setback line, building line
The minimum required distance a structure must be from a lot line, street, or easement.
Project example
A shed shown five feet from a backyard fence may still violate the rear setback if the recorded lot line sits two feet inside the fence.
Lot and zoning
Shed
Also called storage shed, utility shed, outbuilding
A small accessory building for storage or hobby use; not intended for dwelling.
Project example
A 120-square-foot prefab shed may be exempt from a building permit in one municipality but still require zoning approval for its setback, height, foundation, or lot coverage.
Projects and trades
Site Plan / Plot Plan
Also called plat with markups, site sketch
A drawing showing lot lines, structures, setbacks, and proposed work.
Project example
A garage site plan may show the lot, house, garage footprint, driveway, easements, north arrow, and dimensions from the garage to every required lot line.
Plans and records
Stop-Work Order
Also called stop work notice, construction hold
A formal direction from an AHJ to pause construction until a violation, missing permit, safety issue, or review condition is addressed.
Project example
Installing a detached garage before zoning placement is approved can trigger a stop-work order even if the structure is otherwise code-compliant.
Problems and enforcement
Stormwater / Erosion Control
Also called SWPPP, silt fence, NPDES
Measures that manage runoff and prevent sediment discharge during construction.
Erosion control · planNot to scale Project example
A garage project that disturbs a sloped yard may need inlet protection, stabilized access, silt fencing, and a plan for keeping sediment off neighboring property and streets.
Water, utilities and right of way
Structure
Also called improvement, built work
Anything constructed with a fixed location on the ground.
Structure or not · elevationLocal code decides Project example
A roofed pergola may be regulated as a structure even if it has no walls, changing the setback and permit analysis compared with an uncovered patio.
Building code and structure
T
TPR Discharge Pipe
Also called T&P discharge, relief valve pipe
The temperature-and-pressure-relief discharge piping that safely directs water away if a water heater relief valve opens.
Project example
A replacement water heater needs a correctly sized, routed, and terminated TPR discharge pipe rather than a capped valve.
Projects and trades
U
Utility Disconnect
Also called utility release, service disconnect
Documented disconnection or capping of electric, gas, water, sewer, or other services before work that could disturb them.
Project example
A demolition permit may require the gas and electric utilities to be disconnected before the structure is removed.
Projects and trades
V
Variance
Also called zoning variance, deviation
Relief from a dimensional rule such as a setback due to a documented hardship.
Project example
An unusually narrow lot may leave no compliant garage location, leading the owner to request the minimum side-yard relief needed for a workable design.
Lot and zoning
W
Well
Also called private well, domestic well
Onsite potable water source that may trigger health department review for new construction.
Private well · planRadius set by code Project example
An addition may need to shift when the site plan shows that its foundation or septic field would violate the required separation from an existing private well.
Water, utilities and right of way
Y
Yard
Also called required yard, yard area
Open space on the same lot as a building, measured to lot lines (front, side, rear).
Project example
On a corner lot, the area an owner thinks of as a side yard may be regulated as a street-facing yard with a larger setback and a lower fence-height limit.
Lot and zoning
Z
Zoning Permit / Certificate of Zoning Compliance
Also called zoning certificate, zoning approval, CZC
Approval confirming the proposed use and placement meet zoning rules before a building permit is issued.
Project example
A garage can meet structural code and still fail zoning review because its footprint crosses a setback, easement, height limit, or lot-coverage cap.
Lot and zoning
From a term to a filing
A definition tells you what a word means. The Playbook shows how it plays out at the counter, and the permit guides show which office reviews it where you build.
From the Playbook
From definition to filing
Turn permit language into a project checklist.
Check the address first, then build the requirements, documents, and approval path for the actual job.