# Indigo Construction > Indigo Construction LLC is a Sioux Falls, South Dakota contractor owned by Trent Allen. It specializes in basement egress windows (cut-in egress openings, window wells, covers and ladders) and also does basement finishing, foundation repair, drywall, finish carpentry and flooring across eastern South Dakota, from Chamberlain and Mitchell east to the Minnesota line and from Huron and Brookings south to Canton. It holds City of Sioux Falls Residential Building Contractor license #16860 and is BBB Accredited (A+). Key fact: inside Sioux Falls city limits, the city's amendments to the 2021 IRC set the minimum egress opening at 5.0 sq ft (not the model code's 5.7), the maximum sill height at 48 in (not 44), and require a window-well ladder only past 48 in deep. Clear height 24 in and width 20 in are unchanged. Wells need 9 sq ft with 36 in projection and width, and must drain. - Phone: (605) 381-1601 - Email: ta.indigoconstruction@gmail.com - Hours: Mon-Fri 7:30am-8pm, Sat-Sun noon-6pm - Business address: 21215 485th Ave, Elkton, SD 57026 - Sioux Falls office: 4400 E 69th St, Suite 325, Sioux Falls, SD 57108 - Website: https://indigoconstructionsd.com/ ## Main - [Home](https://indigoconstructionsd.com/): Egress window installation, window wells, basement finishing, foundation repair, drywall and carpentry in Sioux Falls and eastern South Dakota. Owner-run. Call (605) 381-1601. ## Services - [Egress windows](https://indigoconstructionsd.com/egress-windows/): Basement egress window installation in Sioux Falls: we cut the foundation, set the well and window, and finish the opening inside. Built to IRC R310. Call (605) 381-1601. - [Window wells and covers](https://indigoconstructionsd.com/egress-windows/window-wells-and-covers/): Egress window wells, covers and ladders in Sioux Falls: steel, composite and stone wells sized to code, drained properly, with covers that open from inside. - [Basement finishing](https://indigoconstructionsd.com/basement-finishing/): Basement finishing in Sioux Falls, egress first: legal bedrooms laid out around a code-sized escape window, then framing, drywall and trim. Call (605) 381-1601. - [Foundation repair](https://indigoconstructionsd.com/foundation-repair/): Foundation crack and seepage repair in Sioux Falls and eastern South Dakota. We fix the crack and the reason for it, and tell you plainly when a wall needs an engineer. - [Drywall](https://indigoconstructionsd.com/drywall/): Drywall hanging, taping, finishing and repair in Sioux Falls: basements, remodels and patch-and-match. Year-round interior work. Call (605) 381-1601. - [Finish carpentry](https://indigoconstructionsd.com/carpentry/): Finish carpentry in Sioux Falls: casing, baseboard, doors, stair trim, egress window returns and built-ins. Call Indigo Construction at (605) 381-1601. - [Flooring](https://indigoconstructionsd.com/flooring/): LVP, laminate and hardwood flooring installation in Sioux Falls and eastern South Dakota, from basement slabs to main floors. Call Indigo Construction at (605) 381-1601. ## Guides - [Egress window code requirements and checker](https://indigoconstructionsd.com/egress-windows/code-requirements/): Sioux Falls egress window rules: 5.0 sq ft clear opening, 24 in high, 20 in wide, 48 in max sill (the city amended the 2021 IRC's 5.7 sq ft / 44 in). Check your window free. ## Service area - [Service area](https://indigoconstructionsd.com/service-area/): Indigo Construction serves Sioux Falls and eastern South Dakota: Brookings, Madison, Mitchell, Huron, Chamberlain, De Smet, Tea, Harrisburg, Brandon, Dell Rapids and out to the Minnesota line. - [Sioux Falls, SD](https://indigoconstructionsd.com/service-area/sioux-falls/): Egress window installation, window wells, basement finishing and foundation repair in Sioux Falls, SD. Owner-run by Trent Allen. Call (605) 381-1601. - [Brookings, SD](https://indigoconstructionsd.com/service-area/brookings/): Egress windows, window wells and basement finishing in Brookings, SD, from a Sioux Falls contractor who works all of eastern South Dakota. Call (605) 381-1601. - [Tea, SD](https://indigoconstructionsd.com/service-area/tea/): Egress windows and basement finishing in Tea, SD. Add code-compliant basement bedrooms to newer Lincoln County homes. Call (605) 381-1601. - [Harrisburg, SD](https://indigoconstructionsd.com/service-area/harrisburg/): Egress windows, window wells and basement finishing in Harrisburg, SD. Owner-run Sioux Falls contractor. Call (605) 381-1601. - [Brandon, SD](https://indigoconstructionsd.com/service-area/brandon/): Egress windows and basement finishing in Brandon, SD, from a Sioux Falls contractor. Window wells, covers and foundation repair. Call (605) 381-1601. - [Madison, SD](https://indigoconstructionsd.com/service-area/madison/): Egress windows, window wells and basement finishing in Madison, SD (Lake County). Call Indigo Construction at (605) 381-1601. - [Mitchell, SD](https://indigoconstructionsd.com/service-area/mitchell/): Egress windows, window wells and basement finishing in Mitchell, SD. Built to Mitchell's 2012 IRC, permit handled with the city. Call Indigo Construction at (605) 381-1601. - [Huron, SD](https://indigoconstructionsd.com/service-area/huron/): Egress windows, window wells and basement finishing in Huron, SD. Permits handled with Huron's Inspections Department. Call Indigo Construction at (605) 381-1601. - [Dell Rapids, SD](https://indigoconstructionsd.com/service-area/dell-rapids/): Egress windows, window wells and basement finishing in Dell Rapids, SD. Built to Dell Rapids' 2006 IRC, not the Sioux Falls amendments. Call (605) 381-1601. ## Company - [About](https://indigoconstructionsd.com/about/): Indigo Construction LLC is an owner-run Sioux Falls contractor founded in 2023 by Trent Allen, specializing in basement egress windows. - [Contact](https://indigoconstructionsd.com/contact/): Request an estimate for egress windows, basement finishing, foundation repair, drywall or carpentry in Sioux Falls and eastern South Dakota. Call (605) 381-1601.