Residential Foundations by Legacy General Contractor
RESIDENTIAL FOUNDATION SYSTEMS — SLAB, CRAWL SPACE, BASEMENT & PIER FOUNDATIONS
We build every type of residential foundation — monolithic slab foundations for grade-level construction, stem wall and post-tension slabs, crawl space foundations with pier and beam or perimeter wall systems, full basement foundations, daylight basements, walkout basements, and concrete pier/caisson foundations. Each foundation is designed for the specific soil conditions, frost depth, and structural loads of your project.
Starting at $8 per sq ft
Residential Foundations Services
Select a service below for pricing, process details, and FAQs.
Basement Foundation Construction
Full basement foundation — excavation, footings, poured walls, waterproofing, and backfill. New construction and additions.
From $20 per linear ft of wall
Learn MoreCrawl Space Foundations
Crawl space foundation walls, footings, and encapsulation. Proper ventilation, vapor barriers, and moisture control.
From $12 per linear ft of wall
Learn MoreSlab-on-Grade Foundations
Monolithic and stem wall slab foundations for garages, additions, and outbuildings. Thickened edges, vapor barriers, and insulation.
From $7 per sq ft
Learn More5 Highlights on Residential Foundations
Slab foundations
monolithic slab, stem wall, and post-tension systems for grade-level construction. Proper moisture barrier, insulation, and reinforcement for Minnesota conditions.
Crawl space foundations
pier and beam, perimeter wall, and crawl space wall installation with proper ventilation and moisture management.
Basement foundations
full basement, daylight basement, and walkout basement construction with waterproofing, drainage tile, and structural reinforcement.
Pier foundations
concrete pier installation, drilled piers, and caisson foundations for difficult soil conditions or elevated structures.
All foundations set below Minnesota frost line (42-60 inches) to prevent heaving and structural damage from freeze-thaw cycles.
Why Choose Our Residential Foundations
Legacy General Services builds residential foundations that last generations. We understand Minnesota soil conditions — clay soils, frost depth requirements, and water table levels — and design accordingly.
Our foundation crews handle the complete process from excavation through backfill, coordinating with engineers, inspectors, and other trades to keep your project on schedule.
Every foundation includes proper waterproofing, drainage systems, and structural connections. We don't cut corners on the elements that keep your foundation dry and stable.
We back every foundation with a written workmanship guarantee covering defects in forming, pouring, and finishing.
Signs You Need Residential Foundations
1. Building a new home
New construction requires a properly engineered foundation designed for the specific soil conditions and structural loads of your project.
2. Adding a major addition
Additions need new foundation work that properly ties into your existing structure and supports the added load without differential settlement.
3. Existing foundation beyond repair
When foundation damage is too severe for repair — extensive cracking, bowing, significant settlement — full replacement may be the best long-term solution.
Our Residential Foundations Process
Step 1 — Site Evaluation
Assess soil conditions, review engineering plans, and confirm footing locations, depths, and dimensions.
Step 2 — Excavation
Excavate to required depth with proper clearance for footings, walls, and waterproofing systems.
Step 3 — Footing Installation
Pour footings to specified dimensions with rebar reinforcement. Allow initial cure before wall construction.
Step 4 — Wall Forming & Pour
Set wall forms, install rebar, anchor bolts, and window/door bucks. Pour walls in continuous operation.
Step 5 — Waterproofing & Drainage
Apply waterproofing membrane and install drainage tile system around the foundation perimeter.
Step 6 — Inspection & Backfill
Pass all required inspections. Carefully backfill to protect waterproofing. Install sump system if required.
Brands We Use
- CEMEX — ready-mix concrete for foundation pours
- W.R. Meadows — waterproofing membranes and sealants
- Mar-flex — foundation waterproofing systems
- NDS — drainage systems and accessories
- Simpson Strong-Tie — anchor bolts and structural connectors
Our Work
FAQs About Residential Foundations
How deep do footings need to be in Minnesota?
Minnesota requires footings at least 42 inches below grade in the southern metro area and up to 60 inches in northern regions to get below the frost line.
Poured concrete vs. block foundation — which is better?
Poured concrete is generally superior for water resistance (no mortar joints) and lateral strength against soil pressure. It's the standard for new construction in Minnesota.
How long does a foundation take to build?
A typical residential foundation takes 2-3 weeks from excavation to backfill, including cure time. Footings take 1-2 days, walls 1-2 days, plus 7+ days minimum curing before backfill.
Pricing
$8 - $25
per sq ft
*Varies by project scope and site conditions.
Related Services
Leave Concrete to the Pros
Because with Legacy General Services,
You Get More Than a Guarantee
When you choose Legacy General Services for your concrete project in the NW Metro, you're choosing a partner committed to quality that lasts.
Reputation
MN-registered contractor since 2023. Insured and trusted by homeowners across the NW Metro.
Transparency
No hidden fees or surprise charges. Upfront pricing on every concrete project—big or small, start to finish.
Efficiency
On-time scheduling and reliable project timelines. We show up when we say we will and finish on schedule.
Quality
Air-entrained, freeze-thaw resistant concrete built for Minnesota winters. Every pour meets or exceeds code.