St. Louis, Missouri Permit Guide
Find St. Louis, Missouri permit offices, local planning notes, application documents, and inspection questions in one guide.
Individual permit guides for St. Louis
- St. Louis Residential Building Permit Guide
- St. Louis Fence, Deck, Shed, and Historic Permit Guide
- St. Louis Trade, Demolition, and Residential Occupancy Permit Guide
- St. Louis, Missouri ADU and Garage Conversion Permit Guide
- St. Louis, Missouri Pool Spa and Barrier Permit Guide
- St. Louis, Missouri Roof Window and Exterior Permit Guide
- St. Louis, Missouri Kitchen Bath and Basement Remodel Permit Guide
- St. Louis, Missouri Solar EV Charger and Generator Permit Guide
- St. Louis, Missouri Driveway Fence Shed and Site Permit Guide
- St. Louis, Missouri Addition Deck Porch and Patio Cover Permit Guide
- St. Louis, Missouri Electrical Panel Circuit and Rewiring Permit Guide
- St. Louis, Missouri Plumbing Water Heater Repipe and Sewer Permit Guide
- St. Louis, Missouri HVAC Heat Pump Gas and Ventilation Permit Guide
- St. Louis, Missouri Foundation Retaining Wall Grading and Drainage Permit Guide
- St. Louis, Missouri Demolition Structural Wall Fireplace and Chimney Permit Guide
Start with jurisdiction and project scope
Before applying in St. Louis, confirm whether the property is within city limits or in unincorporated county territory. Describe the complete work to the office serving that parcel, including electrical, plumbing, structural, and site changes. Building, zoning, utility, and private HOA approvals can be separate.
Open the local official sources or prepare a project checklist.
Source availability audit: . This checks links, not every local rule. These compiled notes are starting points; confirm current dimensions, exemptions, fees, and adopted codes with the cited offices.
Residential Building Permits
St. Louis residential building permits are required for new structures, major alterations, decks, porches, accessory buildings, fences, pools, roof work, and structural repairs.
Permit and scope questions
For St. Louis, ask the permit office to confirm the current area limit and the method used to measure it; whether retained soil, adjacent slopes or supported loads require engineering; how structure use, attachment and utilities affect any accessory-building exemption; whether attachment, a roof, stairs or required exit access changes the deck review; the pool or spa classification and the required access barrier; and which roof repairs, material changes or structural work require a permit before treating this project as exempt or permit-required. St.
Zoning and placement
Historic districts, city landmarks, flood areas, encroachments, redevelopment areas, and special conditions can add approvals before a building permit is issued.
Building and trade review
Separate plumbing, mechanical, and electrical permits may also be required when those trades are part of the work.
Discuss your project early when: Call before applying if the work includes structural framing, a new accessory building, deck, porch, fence, pool, roof sheathing, basement or attic conversion, historic property, or floodplain location.
Sources for this topic:
Fence, Deck, Shed, and Historic Permits
St. Louis requires permits for new fences, decks, porches, retaining walls, and accessory buildings over 50 square feet, with extra review for historic districts and landmarks.
Permit and scope questions
For St. Louis, ask the permit office to confirm the current area limit and the method used to measure it; whether retained soil, adjacent slopes or supported loads require engineering; the fence material, yard location and visibility restrictions; how structure use, attachment and utilities affect any accessory-building exemption; and whether attachment, a roof, stairs or required exit access changes the deck review before treating this project as exempt or permit-required. St.
Zoning and placement
Properties in city historic districts or city landmarks require approval for exterior painting, gutters, windows, doors, tuckpointing, all fences, awnings, canopies, and similar exterior work.
Building and trade review
Replacement of existing fencing of the same height, material, and location in rear or side yards usually does not require a building permit unless historic review applies.
Discuss your project early when: Contact St. Louis before ordering materials or starting work to resolve the current area limit and the method used to measure it; whether retained soil, adjacent slopes or supported loads require engineering; whether age, historic status or an overlay triggers additional review; the fence material, yard location and visibility restrictions; how structure use, attachment and utilities affect any accessory-building exemption; and whether attachment, a roof, stairs or required exit access changes the deck review. Bring the proposed dimensions, location and scope so the answer is tied to the project.
Sources for this topic:
Trade, Demolition, and Occupancy Permits
St. Louis residential projects may need separate electrical, mechanical, plumbing, demolition, occupancy, or Housing Conservation District inspections in addition to building permits.
Permit and scope questions
St. Louis says building permits may also require separate plumbing, mechanical, and electrical permits, and those trade permits must be applied for by the appropriate licensed contractor when required.
Zoning and placement
Encroachments, high hazard uses, special conditional uses, redevelopment areas, historic properties, and flood areas can add approvals before permits are issued.
Building and trade review
A Housing Conservation District inspection is required before occupancy of many residential units, and all St. Louis property is located in a Housing Conservation District.
Discuss your project early when: Call before applying if the project includes electrical, mechanical, plumbing, demolition, occupancy, sale or rental of a residential unit, encroachment, or redevelopment-area property.
Sources for this topic:
Prepare a complete application conversation
- Online or in-person building permit application
- Project address
- Construction plans if required
- Historic or flood information if applicable
- Trade permit information if applicable
- Site plan
- Fence, deck, porch, or shed drawings
- Historic district information if applicable
- Retaining wall height
- Flood area information if applicable
- Building permit number if linked
- Licensed trade contractor account
- Demolition scope if applicable
- Housing Conservation application if occupancy is involved
- Payment information
Bring enough detail for staff to identify the correct application. Ask which plans need dimensions or a professional seal, how files should be named, and whether other departments must approve the proposal first.
Inspection planning
- Apply through STL City Permits or the permit counter
- Resolve required reviews
- Obtain separate trade permits when needed
- Schedule inspections
- Keep final records
- Confirm historic and flood requirements
- Apply for the building permit
- Use residential construction guidelines when plans are needed
- Schedule inspections before covering work
- Obtain building and trade permits
- Request required trade inspections
- Complete Housing Conservation inspection before occupancy when required
- Keep certificates of inspection
Questions to resolve before work starts
- Which building, zoning, trade, utility, or public-works approvals apply to this exact scope?
- Is an apparent exemption limited to the building permit, while zoning or trade approval still applies?
- Which current fee schedule, code edition, and local amendments will be used?
- Who may apply, and which licensed trades must perform or supervise the work?
- Which inspection stages cannot be covered, and how is the final approval recorded?
Official source directory
- St. Louis Residential Permit Criteria
- St. Louis Apply for a Building Permit
- St. Louis Building Division Permits
- St. Louis Residential Construction Guidelines
- St. Louis Additional Permits Required
- St. Louis Electrical Permits
- St. Louis Mechanical Permits
- St. Louis Residential Occupancy Permit
If an official link is unavailable or redirects to a general page, use that government's site search or contact its permit office. Some government sites restrict automated access; that does not establish that a page is missing.