Zoning, building permits and septic rules in Berkeley, Missouri

At a glance

Zoning

City of Berkeley zoning, Chapter 400¹⁴

Building permits

Issued by the city's Inspections and Code Enforcement division²

R-1 minimum lot

20,000 square feet and 75 feet wide⁵

R-1 setbacks

40 ft front, 10 ft side, 30 ft rear⁶

Mobile homes and trailers

Only as Chapter 415 (trailer parks) allows⁷

Septic

Not confirmed inside the city; St. Louis County Department of Public Health is the office to ask⁸

Flood

Construction must follow Chapter 410, Flood Damage Prevention⁹

Who to call

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Does Berkeley, Missouri have zoning?

Yes. The City of Berkeley zones all land inside its limits under its own Chapter 400 Zoning Regulations, not unincorporated St. Louis County's code¹. The city is divided into these districts: R-1, R-2, R-3 and R-4 for residences, C-1, C-2 and C-3 commercial, M-1 and M-2 industrial, F (floodplain), P (park), AD (airport), and DT-1 and DT-2 downtown⁴. There is no agricultural district on that list, so a rural-style lot or farm use is not a built-in category here⁴.

The city's Economic Development department regulates zoning, subdivision and signs¹⁰. Land divisions fall under the city's Chapter 405 Subdivision Regulations¹¹.

What are the lot size and setback rules in Berkeley's R-1 district?

In the R-1 single-family district, Berkeley requires at least 20,000 square feet of lot area per family and a lot at least 75 feet wide⁵. Required yards are 40 feet in front, 10 feet on each side and 30 feet in the rear (or 20% of lot depth if larger, up to 50 feet)⁶. Maximum building height in R-1 is 35 feet or two and one-half stories¹².

A driveway in an R-1 front yard may not exceed 20 feet in width, and each lot gets one driveway¹³. We have not confirmed the R-2, R-3, R-4 or commercial district figures, so ask the city before assuming the R-1 numbers apply to your lot⁵.

Do you need a building permit in Berkeley, and who issues it?

Berkeley issues building, mechanical, electrical and plumbing permits through its own city office, and some permits also need a zoning approval form². Call the Inspections and Code Enforcement division at (314) 400-3713². For the zoning form, the city directs applicants to Public Works².

We could not confirm the building code edition the city has adopted, the permit fees, whether owner-builders are exempt, or the certificate-of-occupancy process, so get these from the division before you budget. The county's Chapter 1115 building code applies to unincorporated St. Louis County, not to land inside Berkeley's limits¹⁴.

How do septic permits work inside Berkeley?

We could not confirm who permits septic systems inside Berkeley city limits. Missouri requires a construction permit before installing or repairing most onsite wastewater systems, and some single-family lots may be exempt¹⁵. In St. Louis County that permitting authority is the county Department of Public Health or the county plumbing department, depending on the system and whether the property is in an incorporated area⁸.

St. Louis County averages about 1,944 people per square mile¹⁶, so many lots in town are likely on public sewer, but we have not confirmed this for Berkeley. Before you plan a septic system or a well, call the St. Louis County Department of Public Health at (314) 615-0600³.

Can you live in an RV, mobile home or tiny home in Berkeley?

Berkeley allows no trailer coach or mobile home to be parked, used or occupied in any district except as its Chapter 415 trailer park rules provide⁷. Living in an RV or trailer on an ordinary residential lot should therefore be treated as not allowed unless the city confirms otherwise. We could not confirm the city's rules on tiny homes, temporary camping or accessory dwellings; ask the zoning office at (314) 524-3313¹⁰.

Short-term rentals also need a city permit under Article XIII of Chapter 400¹⁷.

Building a home in Berkeley: the steps, in order

1. Confirm your lot's zoning district on the city's zoning map and read the district rules in Chapter 400⁴.
2. Ask Public Works whether your project needs a zoning approval form².
3. Check whether the lot touches the floodplain (F) district; all construction must follow Chapter 410, Flood Damage Prevention⁹.
4. Apply for building, mechanical, electrical and plumbing permits with the city's Inspections and Code Enforcement division².
5. Ask the county health department about septic or well rules if the lot has no public sewer or water³.

What to check before you buy land in Berkeley

Berkeley sits in St. Louis County, whose typical home value is about $293,458¹⁸ and whose effective property tax rate is 1.2%¹⁹. The nearest city of 100,000 or more people is about 15 miles from the county center²⁰. Flood zoning matters: any construction in the floodplain district must follow the city's flood damage prevention chapter⁹.

For land outside city limits, use the St. Louis County page: the county's rules differ from the city's.

Watch-outs

• City rules apply only inside Berkeley's limits; the St. Louis County building code and zoning ordinance govern unincorporated land, so confirm the lot is inside the city before you rely on either²¹.
• We could not confirm Berkeley's adopted building code, permit fees or owner-builder rules; call (314) 400-3713 before you design².
• Missouri law requires a permit for all development in a floodplain, in addition to any city rules²².

Sources

1. City of Berkeley, MO code of ordinances table of contents (eCode360) (Berkeley), quoted and re-checked
2. City of Berkeley Inspections and Code Enforcement (Public Works) (berkeleymo.us)
3. St. Louis County Department of Public Health (stlouiscountymo.gov)
4. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
5. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
6. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
7. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
8. OWTS Construction Permit Process — St. Louis County authorities, quoted and re-checked
9. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
10. City of Berkeley Economic Development (planning and zoning) (berkeleymo.us)
11. City of Berkeley, MO code of ordinances table of contents (eCode360) (Berkeley), quoted and re-checked
12. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
13. Chapter 400 Zoning Regulations, Article II: Districts and District Regulations (eCode360) (Berkeley), quoted and re-checked
14. Chapter 1115 - Building Code (2026 county census)
15. OWTS Construction Permit Process (Missouri statewide rule), quoted and re-checked
16. Population density: Bolthole Index county data
17. Chapter 400 Zoning Regulations, section index incl. Article XIII Short Term Rentals (eCode360) (Berkeley), quoted and re-checked
18. Typical home value (Zillow): Bolthole Index county data
19. Effective property tax rate: Bolthole Index county data
20. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
21. Residential Above Ground Swimming Pool Checklist and Guide for a Building Permit (2026 county census)
22. Floodplain Forms (Missouri statewide rule), quoted and re-checked

Written October 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.