Answer
What do home system upgrades cost?
Electrical panel upgrade: $8,000–$15,000. Plumbing replacement: $15,000–$30,000. HVAC system: $8,000–$20,000. Combined systems work typically runs $30,000–$60,000+ depending on home size and scope.
Electrical Panel Upgrade
$8,000–$15,000
Increased capacity, updated breakers
Plumbing System
$15,000–$30,000
Replace old lines, upgrade fixtures
HVAC System
$8,000–$20,000
Energy-efficient unit, ductwork, zoning
Ventilation & Moisture
$5,000–$12,000
ERV/HRV, exhaust fans, dehumidifiers
Timeline
Assessment & Planning
1–2 weeks
Inspect systems, identify upgrades needed
Permitting
1–3 weeks
Electrical, plumbing permits if separate
Installation
2–4 weeks
Remove old systems, install new
Testing & Inspection
1 week
Test all systems, final approval
Carolina Coastal Construction · Charleston, SC
Systems & Infrastructure Upgrades That Support the Whole Home
Behind-the-wall improvements that protect your renovation investment, improve performance, and prepare your home for long-term coastal living.
Request an Infrastructure ReviewServing Charleston, Mount Pleasant, Daniel Island, Sullivan's Island & surrounding coastal communities.
Infrastructure That Makes the Rest of the Home Work
In coastal South Carolina homes — particularly those built in the 1970s through early 2000s — outdated electrical panels, aging plumbing, undersized HVAC, and compromised moisture barriers are more the rule than the exception. These aren't cosmetic issues. They affect safety, performance, insurance eligibility, and the long-term integrity of any renovation work done on top of them.
Carolina Coastal Construction approaches systems and infrastructure work as a coordinated renovation discipline — not a checklist of trade callouts. We review existing conditions, identify what needs to be updated, sequence the work correctly with other renovation phases, and coordinate the trades required to complete it cleanly.
Whether you're upgrading ahead of a larger renovation or addressing aging systems independently, we build a clear scope with transparent pricing — no guesswork about what's being done or why.
Scope of Services
What We Handle
A complete, coordinated scope — managed by your dedicated project manager.
Why Coastal Homes Need Infrastructure Attention
Charleston and Mount Pleasant homes experience infrastructure degradation faster than inland properties. High humidity accelerates corrosion in electrical systems and accelerates pipe degradation. Salt air affects HVAC coil life significantly. Moisture intrusion through older building envelopes creates conditions where insulation, framing, and electrical components suffer long before visible damage is apparent.
Many coastal homeowners discover infrastructure issues when they're mid-renovation — when walls are already open and schedule and budget pressure is highest. A pre-renovation systems assessment identifies these conditions before they become construction emergencies.
Addressing infrastructure before or during a renovation, rather than after, is almost always the more cost-effective approach. Systems that are properly upgraded provide a foundation that extends the life and performance of everything installed above them.
Ready to discuss your project? Our team is standing by.
How It Works
Our Process
A structured, managed approach from first meeting through final walkthrough.
Discovery & Site Review
We visit your property, review existing conditions, assess your goals, and identify any structural, permit, or coastal considerations that affect your project.
Planning & Scope Development
We define a clear, detailed project scope — materials, sequencing, trade coordination, and schedule — so nothing is left to guesswork before construction begins.
Proposal & Timeline
You receive an itemized proposal with transparent pricing, a phased timeline, and payment milestones clearly documented before we break ground.
Construction Coordination
Your dedicated project manager oversees every phase, coordinates trades, handles inspections, provides weekly written updates, and ensures quality at every step.
Start Planning Your Project
Tell us about your project and we will follow up to discuss your goals, timeline, and next steps.
Common Questions
Frequently Asked Questions
Ready to Review Your Home's Infrastructure?
Tell us about your property and any concerns you're aware of. We'll assess what's relevant and develop a prioritized, transparent scope.
Schedule a ConsultationOr call us: (843) 310-2160
Planning a Coastal Renovation in Charleston?
Start with the right plan, materials, and construction team before the first decision becomes expensive. Let's discuss your vision and create a winning strategy.