Question 1

What has to happen before I can pull a building permit on a Jefferson County lot?

Accepted Answer

The septic permit comes first. Most of Jefferson County, Missouri outside the incorporated cities is not on public sewer, so a ground-up build there runs on an onsite wastewater treatment system. The county Health Department reviews an Onsite Sewage Disposal Permit Application plus a plot plan and a preliminary soil investigation, an Environmental Health Specialist visits the site to do a soils examination, and only after that sewage permit issues does the building permit issue. Only a registered OWTS Onsite Soil Evaluator may perform the site and soil work, which is a scheduling dependency on a small pool of licensed evaluators, not a paperwork step you can rush. We size interest reserve for the soil evaluation, not for the framing.

Question 2

Does Jefferson County publish permit fees or an impact fee for new construction?

Accepted Answer

Not that we could source. We looked for a Jefferson County permit fee schedule, a plan-review turnaround time, and any impact fee on new construction and could not find one from a primary source, so we do not print one here or promise a number in your term sheet. Bring us your actual quote from the county or from Arnold's Building Department and we size the draw schedule and interest reserve around it.

Question 3

Building inside Arnold itself: does the city require anything at completion?

Accepted Answer

Yes, an occupancy sign-off, and it is enforced at the point of sale too. Arnold's Code of Ordinances Section 500.090 makes it unlawful to sell, transfer, mortgage or lease a structure until it has secured a Certificate of Compliance, issued after a Property Maintenance Inspection by the Arnold Building Department. Effective January 15, 2026 the city rewrote the ordinance to also require a certificate of occupancy at completion of construction activity. If you are building on spec inside Arnold and expect to sell or refinance on completion, plan for that inspection as part of your exit, not an afterthought after the last draw.

Question 4

Arnold sits near the Meramec. Does that change the build sequence?

Accepted Answer

It adds a permit if your lot is in the mapped floodplain. Arnold participates in the NFIP, and the city's own floodplain page states that work in a Special Flood Hazard Area requires a Floodplain Development Permit before work begins, with an Elevation Certificate sometimes required on top of it. Arnold sits at the Meramec's confluence and was one of the country's original repetitive-loss flood buyout communities after the 1993 flood, so the city takes floodplain review seriously. Confirm your parcel's flood zone before we set the draw schedule; a permit that has to be pulled before ground is broken is a schedule item, not a formality.

Question 5

I'm building on a lot with a private well. Is there anything to check before we close?

Accepted Answer

Yes: the whole county sits inside a single Superfund site, and well testing is free. EPA's own fact sheet states the Southwest Jefferson County Mining NPL Superfund Site covers all of Jefferson County, Missouri, with lead as the contaminant of concern. Operable Unit 5 covers private drinking-water wells, and EPA offers free testing of a private well and residential yard soil under that unit. We are not saying any specific parcel is contaminated; we are saying a private well on a countywide NPL site should get that free OU-5 test before your loan funds, the same way you would order a survey.

Question 6

How much leverage can I get on an Arnold, Missouri ground-up build, and how long is the term?

Accepted Answer

Up to 70% LTV and 85% of cost, whichever binds first, on a 12 to 24 month term. That covers a lot purchase or a teardown, spec or build-to-rent, up to $5M, with draws released against your build schedule. On a lot outside the sewer service area, plan the schedule around the soil evaluation and septic permit ahead of the building permit; on a lot inside Arnold's Special Flood Hazard Area, plan around the floodplain permit as well. Experienced builders can access higher leverage on cost. Subject to underwriting.

Ground-Up Construction in Arnold

How it works

Run your Ground-Up Construction numbers.

Ground-Up Construction in Arnold, answered.

More Ground-Up Construction questions, answered on the program page

Guides for Ground-Up Construction

Other programs in Arnold

Ground-Up Construction elsewhere in Missouri

Funding Arnold deals fast.