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Solar site surveys · MissouriA technician on the roof, in the attic and at the service panel, with the survey read against the code editions, AHJs and utilities that apply in Missouri.
Missouri has no statewide building or electrical code for homes, so code editions are set city by city and county by county: the City of St. Louis enforces 2018 I-Codes and the 2017 NEC, while St. Louis County's own guides still cite 2015 I-Codes and the 2014 NEC. Under the Net Metering and Easy Connection Act, systems up to 100 kW net against usage each month, but any monthly surplus is credited only at avoided cost. State law bars deed restrictions from prohibiting rooftop panels on owner-maintained roofs.
The capture spec is the same everywhere. What the engineer and the plan reviewer read it against is not.
With no statewide code, neighboring AHJs can be a code cycle or two apart, such as the City of St. Louis on 2018 I-Codes and St. Louis County guides citing 2015 codes.1,3
St. Louis County's bracing guide uses a 90 mph wind speed and Seismic Design Category C, under which one- and two-family homes need only be designed for wind loads.5
Who reviews the plan set, and what the state layers on top.
Missouri has no retail electric choice for homes; investor-owned utilities, rural co-ops and municipal utilities each follow the state net metering law, and co-ops and municipal systems are covered by the same 100 kW rule.7
The investor-owned utility serving the City of St. Louis, based in St. Louis. Customers or installers apply online for interconnection and net metering, net-metering agreements are capped at 100 kW, and net excess energy is credited at an avoided fuel cost of 3.84 cents per kWh in summer and 3.39 cents in winter under the tariff effective March 1, 2025.12,6,13
Interconnection page ↗Serves Kansas City and western Missouri through its Missouri Metro and Missouri West jurisdictions. Applications need panel and inverter spec sheets, a site plan and a one-line drawing with a production meter placed between the AC disconnect and the main panel, and the meter exchange is requested through Evergy's portal after installation.14
Interconnection page ↗One standard, one visit, the same record in Missouri as everywhere else. What it gets checked against is the code stack above.
There is no statewide edition. The City of St. Louis uses the 2017 NEC, and St. Louis County's published code lists reference the 2014 NEC, so check with each city or county.1,2,3
For systems up to 100 kW, usage and generation net each billing period; any surplus is credited at the utility's avoided fuel cost, not the retail rate.7,6
No for roofs the owner owns and maintains: 442.404 RSMo stops covenants from prohibiting rooftop panels, though associations can set placement rules that do not impair the system or raise its cost.8
Yes. The state law applies to all retail electric suppliers, including rural co-ops and municipal utilities, up to 5% of each supplier's peak load.7
Metro pages for Missouri: St. Louis.
Roof, attic and service panel in one visit
Explore →Roof, structure and switchgear
Explore →Terrain, build and operations
Explore →Roof and electrical, one visit
Explore →Stamped sets, six days from survey
Explore →SA, TOF and TSRF per plane
Explore →Every local fact on this page links to where it came from. Codes, programs and tariffs change: confirm the current requirement with the AHJ and the utility before you design.
Bring your monthly job count and the AHJs you submit into, and we will tell you straight whether we fit.
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