Looking for a basement contractor in Martensdale, IA? Describe your project once and up to three basement contractors who work in Martensdale and Warren County get back to you with a quote. It's free and there is no obligation.
Martensdale is home to about 413 people (2024 Census Bureau estimate), a shrinking community (−1.7% since 2020). With 1,087 people per sq mi, it is a suburban area. Full basements are common here and often the cheapest way to add living space.
Martensdale at a glance
- Population (Census Bureau estimate, 2024)
- 413 (−1.7% since 2020)
- Rank in Iowa
- 482nd of 940 cities and towns
- Land area
- 0.4 sq mi
- Population density
- 1,087 people per sq mi (suburban)
- Type
- City (Martensdale city)
- Main county
- Warren County
What to check before hiring in Martensdale
- Moisture first: waterproof before finishing.
- Egress: in Iowa, a basement bedroom needs an escape opening.
- Radon: test before you finish.
- Price drivers: size, bathroom, ceiling height, finishes and egress.
Useful official resources
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ICC: International Code Council
Official information and guidance.
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EPA: radon
Official information and guidance.
Services available in Martensdale
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Basement finishing
Framing, insulation, electrical, drywall and flooring of a basement, with permit.
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Basement bathroom or rental unit
Bathroom, kitchenette or legal basement unit with egress and plumbing.
Frequently asked questions in Martensdale
How much does basement finishing cost in Martensdale, IA?
It depends on size, bathroom and finishes. Describe your basement: contractors who serve Martensdale reply with a quote.
How long does it take?
Often several weeks.
Can I rent it out?
Only if local rules allow an accessory unit; check zoning.
Which basement contractors will contact me?
Up to three independent basement contractors who serve Martensdale 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.