Looking for a barndominium builder in Lannon, WI? Describe your project once and up to three barndominium builders who work in Lannon and Waukesha County get back to you with a quote. It's free and there is no obligation.
Lannon is home to about 2,048 people (2024 Census Bureau estimate), a growing community (+51.5% since 2020). With 828 people per sq mi, it is a semi-rural area. Rural acreage around here suits barndominiums, which combine a home and a shop on one slab.
Lannon at a glance
- Population (Census Bureau estimate, 2024)
- 2,048 (+51.5% since 2020)
- Rank in Wisconsin
- 264th of 607 cities and towns
- Land area
- 2.5 sq mi
- Population density
- 828 people per sq mi (semi-rural)
- Type
- Village (Lannon village)
- Main county
- Waukesha County
What to check before hiring in Lannon
- Permit: in Wisconsin, a barndominium used as a home needs a residential building permit where the county or city requires one.
- Site work: a well, a septic system, power and a driveway can add significantly to rural builds.
- Shell or turnkey: make sure every quote covers the same scope.
- Financing: ask lenders early about construction loans for barndominiums.
Useful official resources
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ICC: International Code Council
Publisher of the building codes most states and cities adopt.
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EPA: septic systems
If the land has no public sewer.
Services available in Lannon
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Barndominium construction
Construction of a steel or post-frame barndominium, shell or turnkey, with the permit.
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Barndominium plans
Custom or adapted plans and engineering for a barndominium, ready for the permit and the builder.
Frequently asked questions in Lannon
How much does a barndominium cost in Lannon, WI?
It depends on the size, the structure, the finish level and the site work. Describe your project: builders who serve Lannon reply with a quote.
How long does it take to build?
Often six months to a year from plans to move-in, depending on permits and finish-out.
Steel or post-frame?
Both are common: steel frames allow wide clear spans; post-frame (wood) is often cheaper and easier to finish. Ask builders for both options.
Which barndominium builders will contact me?
Up to three independent barndominium builders who serve Lannon and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.