Mainline Construction Inc

Construction company in Johnston, IA 50131

Call (515) 491-5819

About this company

Mainline Construction Inc is listed as a construction company based in Johnston, Iowa, in Polk County. Federal motor carrier records list 3 drivers and 4 trucks for the company. It is one of 18 general contractors in ZIP 50131.

Other construction companies nearby

All Star Concrete LLC4989 NW Johnston Dr, Johnston
(515) 224-6394
Dynasty Homes8018 NW 104th Ct, Johnston
(844) 351-4084
Dynasty Homes8018 NW 104th Ct, Johnston
(844) 351-4084
Garagetips-101.com / American Holdings, L.L.C.10335 Norfolk Dr Unit 8, Johnston
(641) 777-5424
Grimm Concrete Services Inc.6895 NW 93rd Ct, Johnston
(515) 240-1922

Housing market around ZIP 50131

Figures describe the local area, not this company.

Typical home value$401,000+0.9% past year · +48% in 10 years
Typical rent$1,356+0.6% past year
12-month value outlook+1.4%
New homes permitted, 20254,730Polk County
Days to sale agreement32Des Moines metro · 28 a year ago
Listings with a price cut33.3%Des Moines metro
Sale price vs list98.2%Des Moines metro
New construction sales218Des Moines metro, Aug · −7% from last year

Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.

Typical home value, last 10 years

$300K$350K$400K201620182020202220242026$401K

Source: Zillow Home Value Index, Sep 2026.

Local building angle: Polk County permitted 4,730 new homes in 2025, including 2,310 apartment units. 62% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.