South Lyon, Michigan Building Permit Guide

In the City of South Lyon, the city’s own Building Department at 335 S. Warren Street reviews plans, issues building and trade permits and inspects the work; Ken Pike is the Building Official. Permit staff answer (248) 437-5255 from 9 a.m. to 2 p.m. on weekdays. The department takes no online submissions, so applications are filed on the city’s forms. Under the schedule of fees adopted February 23, 2026, a building permit is $75 for the first $1,000 of construction cost and $15 for each further $1,000, with the cost taken from the ICC chart.

What requires a building permit in South Lyon?

The Building Department says a permit is needed before work starts on new construction, additions, decks, driveways and many remodeling projects, and that electrical, plumbing and mechanical work may need permits of its own. Staff will tell you whether a project meets the zoning ordinance and whether a permit is needed. Appeals from a building code decision go to the Construction Board of Appeals, which has its own application form. Smaller exterior projects go on a zoning compliance application instead of a building permit.

The fee schedule charges $50 for a zoning permit for structures that do not need a building permit, and starting work without a permit doubles the permit fee. If your home is in a homeowners association, the department suggests checking the association’s rules before you change the exterior.

What South Lyon decides and what the state holds

The construction code and contractor licensing are set by the state, and no city can amend the code. The Bureau of Construction Codes’ Statewide Jurisdiction List shows South Lyon enforcing all four codes (building, electrical, mechanical and plumbing) itself, while Oakland County has no county program. The city adds its own fee schedule, contractor registration, zoning ordinance, a $500 cash bond on new houses, and water and sewer tap-in charges.

South Lyon building department: who handles permitting

The Building Department enforces the construction and zoning codes, reviews plans, issues permits and inspects. Before applying, call to confirm the job address is inside the city: the South Lyon mailing address also covers four surrounding townships, and the city department issues permits only inside the city limits.

South Lyon permit types

The department posts a separate form for each permit: building (with checklist), electrical, mechanical, plumbing, sign, residential water heater replacement, residential HVAC replacement and zoning compliance, plus a contractor registration form, a hold harmless agreement, a gas pipe sizing worksheet, a deck cross-section, an A2L refrigerant affidavit and a zoning review plot plan checklist. The building application says plumbing, mechanical and electrical work each need their own application.

Residential permits

• New houses pay plan review of $450 for up to 3,000 square feet including the basement, plus $0.15 for each square foot above that, and post a $500 cash bond.
• Decks carry a $54 plan review; in-ground pools $450 and above-ground pools $100 per pool.
• Equipment swaps: a residential furnace or air-conditioner replacement, alone or combined, and a like-for-like water heater are each $80 on their own short forms.
• Construction documents are required unless the Building Official waives them because the description shows code compliance; houses under 3,500 square feet do not need an architect’s or engineer’s seal.

Building or remodeling a home here? Alliance handles residential permit expediting, so the crew isn't waiting on the counter.

Commercial permits

Commercial plan review is priced by building volume and the number of trades reviewed, from $325 for one trade on a building of up to 60,000 cubic feet to $650 for four. Hood and duct plan review is $300 and spray booth review $250. A new business pays a $75 inspection, and the certificate of occupancy is 5% of the building permit fee.

For tenant improvements and new commercial builds, Alliance handles commercial permit applications through issuance. More on this: commercial building permits explained.

What comes before the building permit

• Zoning review. The building application and zoning compliance application both rely on the zoning review plot plan checklist. Planning and zoning applications are reviewed by the city’s consultants, and applicants pay consultant charges, with escrow deposits for site plans, rezonings and special land uses.
• Pre-application meeting. The first one is free; later meetings are billed at consultant rates.
• Planning Commission. Meets at City Hall on the second Thursday of the month at 7 p.m.; single-family site plan review is $650 plus $4 per lot or unit and a $2,000 escrow.
• Zoning Board of Appeals. Meets on the third Thursday of each month at 7 p.m. when there are cases; applications cost $450, and the city posts 2026 meeting dates and filing deadlines.
• Soil erosion. The Oakland County Water Resources Commissioner runs the Part 91 program in South Lyon, for earth changes over one acre or more than 225 square feet within 500 feet of a lake, stream, wetland or drain.
• Water and sewer. New connections pay a water tap-in of $3,800 and a sewer tap-in of $5,200 per unit factor, with unit factors assigned by the county, plus a $30 water and sewer inspection.
• Street work. Work in the public right-of-way needs a right-of-way construction permit: $100 for aerial cable or wire work, $150 for boring, jacking or tunneling and $250 for pavement cuts, or a $2,500 annual blanket permit for utilities.

South Lyon permit costs and fees

City Council adopted South Lyon’s current schedule of fees on February 23, 2026. It replaces the 2008 schedule still mentioned on the 2017 building application form. The building permit fee includes one inspection, and the ICC chart is used to set the cost of construction.

Worked example from the schedule: if the ICC chart puts a new house at $300,000, the building permit is $75 plus 299 × $15, or $4,560. A house of up to 3,000 square feet adds $450 of plan review, the certificate of occupancy adds 5% of the permit fee ($228), and the $500 cash bond is posted separately, before trade permits and tap-in fees.

Planning fees sit in the same schedule. A zoning verification letter is $100 and a sign permit review $150. A single-family rezoning is $850 plus $5 per acre with a $2,000 escrow, a special land use is $300 plus the site plan fee and a $1,000 escrow, and a land division or lot split review is $325 plus $30 per resulting lot. Permanent signs pay the same as a building permit, while temporary signs, allowed for up to 60 days, are $20.

Trade permits and who may pull them

South Lyon issues electrical, mechanical and plumbing permits itself on separate applications, each with a $30 application fee, item charges, a $35 re-inspection and a $55 final inspection fee. Trade contractors register their state license with the city for $15, and building contractors for $20.

• Electrical: a service up to 200 amps is $20, circuits $5 each and light fixtures $6 per 25; fire alarms start at $50 for up to 10 devices.
• Mechanical: a heating system in a new house is $50, gas-burning equipment $30, and duct and piping $0.05 per foot with a $25 minimum. Since November 1, 2025 the city requires A2L refrigerant systems to be tested, and it posts an A2L affidavit.
• Plumbing: fixtures and floor drains are $5 each. A sump pump drain line needs a plumbing permit and an inspection, and that permit can be taken out by an excavator, as with the sewer connection and water tap.

Residential builders and maintenance and alteration contractors are licensed by the state, as are electrical, plumbing and mechanical contractors, and the building application asks for the builder’s license number and expiry date. The city’s pages do not set out a separate homeowner permit procedure, so ask the department before you apply for your own work.

How to apply for a South Lyon building permit

Review, corrections and what causes delay

The department reviews plans before issuing a permit, and the building application has boxes for any ZBA case number and site plan review number tied to the job. Consultant charges for meetings and reviews of planning applications are passed on to the applicant, which is why site plans, rezonings and special land uses need escrow deposits. Cancelling a permit costs 35% of the permit fee, and reactivating an abandoned permit costs 35% of the fee, but only after the department confirms nothing in the submitted plans has changed.

Inspections and certificates in South Lyon

Inspections run Monday to Thursday only and need 24 hours’ notice by phone at (248) 437-5255. The building permit fee covers one inspection; each additional inspection or re-inspection is $35, and special or overtime inspections are $45 an hour with a $90 minimum. Trade permits charge a $55 final inspection, and sump pump drain lines must be inspected.

The certificate of occupancy costs 5% of the building permit fee, and a new business inspection is $75. Water and sewer connections carry a separate $30 inspection. Demolition permits are issued only after the applicant certifies that every utility has been notified and disconnected, and the fee is $50 plus $0.05 per square foot.

Michigan building code in South Lyon

FEMA’s Community Status Book lists the City of South Lyon (community 261037) as participating in the National Flood Insurance Program; its flood map is dated September 29, 2006 and is marked as having no base flood elevations determined. The building application includes a flood zone sign-off along with zoning, fire, soil erosion, water supply and sewer approvals.

Michigan enforces one statewide construction code under the Stille-DeRossett-Hale Single State Construction Code Act (1972 PA 230); local units cannot amend it, and enforcement sits with the city, village or township, a county program or the state Bureau of Construction Codes, sometimes split by trade. Michigan rules

South Lyon permit search and official resources

South Lyon has no public online permit search, so call the Building Department about a permit on your own property. For copies of permit files and other records, send a Freedom of Information Act request to the City Clerk/Treasurer on the city’s October 2026 FOIA request form; the office is at City Hall, (248) 437-1735, and FOIA requests are charged at actual cost under the fee schedule. Assessment questions go to Oakland County Equalization at (248) 858-8792.

• South Lyon Building Department and permit forms
• Schedule of fees adopted February 23, 2026
• Building permit application
• Planning and Zoning Department
• Planning Commission
• Zoning Board of Appeals
• Clerk/Treasurer and FOIA forms
• Oakland County soil erosion permits
• BCC Statewide Jurisdiction List
• FEMA Community Status Book, Michigan

South Lyon building permit FAQs

Can I apply for a South Lyon permit online?

No. The Building Department does not accept online submissions; file the city’s forms at City Hall, 335 S. Warren Street.

How much is a building permit in South Lyon?

$75 for the first $1,000 of construction cost and $15 for each further $1,000, using the ICC chart; a $300,000 house is $4,560 before plan review and other charges.

Do I need a permit for a fence or shed?

Fences and sheds under 200 square feet go on a zoning compliance application rather than a building permit.

Does replacing a furnace or water heater need a permit?

Yes. Residential HVAC replacements and like-for-like water heaters each have an $80 permit on their own form.

When are inspections done?

Monday to Thursday only; call (248) 437-5255 at least 24 hours ahead.

Is my South Lyon address in the city?

Not always. The South Lyon mailing address also covers four townships, so call the department to confirm before applying.

How do I appeal a zoning decision in South Lyon?

File a Zoning Board of Appeals application ($450); the board meets on the third Thursday of the month at 7 p.m. when it has cases, and the city posts filing deadlines.

Who handles soil erosion permits?

The Oakland County Water Resources Commissioner, for earth changes over one acre or more than 225 square feet within 500 feet of water.

Simplify South Lyon permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Michigan. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about South Lyon permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.