Septic Permitting
We handle the full permitting process. From site evaluation to final approval, we make sure your project stays compliant and on schedule.
Septic Design & Engineering Services
Permitting-Ready Septic System Designs for Homes, Businesses & Builders
Whether you’re building on raw land or expanding a property with an aging system, septic design is where your project begins — and where approvals can stall if you don’t get it right. At WeCo Septic & Excavation, we provide code-compliant, DES-ready septic engineering and design services that keep your timeline moving.
The Right Design Means Faster Permits and Fewer Surprises
A poorly designed system leads to delays, rejections, and costly mid-project changes. WeCo works with builders, homeowners, and property owners to develop septic system designs that meet site needs, pass inspection, and hold up for years to come.
Design & Engineering Services We Offer
Engineered Septic Systems
Custom-designed systems for challenging sites, poor soil, or high-capacity needs, built to meet code and perform reliably.
Avoid These Common Setbacks
Delays from Missing Paperwork
Designs Rejected by DES or Local Officials
Wrong system for the site (costly mid-project changes)
Incomplete plans that slow down contractors or installers
Who We Serve
- Residential New Builds
- Custom Homes on Difficult Lots
- Commercial Developments
- Subdivision and Multi-Lot Builders
- Renovations and Septic Upgrades
Why Work With WeCo?
Local Expertise
We know South Carolina’s septic codes, soil types, and permitting processes inside and out.
Builder-Friendly Communication
Fast updates, clean plans, and minimal delays.
Upfront Pricing
Transparent fees and phased billing if paired with install.
Start-to-Finish Service
Design, permit, install — all under one roof if you choose.
Residential Septic Services FAQs
What happens during a septic inspection?
A septic inspection checks the tank, pipes, baffles, sludge levels, and drain field performance.
How often should a septic system be inspected?
Most experts recommend inspections every 1-3 years depending on household size and system use.
Do I need an inspection before buying a home?
Yes, a septic inspection is highly recommended before purchasing a property with a septic system.
Can septic inspections detect leaks?
Yes, inspectors can often identify leaks, cracks, and blockages that may cause major problems later.
Are inspections required by law?
Requirements vary by state and county, but many areas mandate inspections during real estate transactions.
How long does a septic inspection take?
Most inspections take between 1-3 hours depending on accessibility and system size.
What Our Customers Say Says It All
We don’t just talk tough — we show up, do the work, and leave people glad they called. Here’s what homeowners, builders, and property managers across West Columbia have to say about working with WeCo.