Skip to main content

Whole House Generator Installation Cost Guide

Electrical

Standby generator installation with automatic transfer switch. Keep your home powered during outages.

📊Showing National Average Pricing

Enter your ZIP code below for personalized local pricing

Basic

Small portable generator with manual transfer switch

$5,500
$4,500 - $6,500

Typical Scope:

  • ✓7,500-10,000 watt portable unit
  • ✓Manual transfer switch (6-8 circuits)
  • ✓Basic essential circuits only
  • ✓Gas-powered generator
  • ✓Outdoor storage required
  • ✓Manual start-up required
  • ✓1-2 day installation
Standard

Mid-size standby generator with automatic transfer

$8,250
$6,500 - $10,000

Typical Scope:

  • ✓14-20 kW standby generator
  • ✓Automatic transfer switch
  • ✓Power most essential circuits
  • ✓Natural gas or LP connection
  • ✓Permanent concrete pad
  • ✓Automatic start on outage
  • ✓2-3 day installation with permits
Premium

Whole-house generator with complete home coverage

$12,500
$10,000 - $15,000

Typical Scope:

  • ✓22-26 kW whole-house generator
  • ✓200-amp automatic transfer switch
  • ✓Power entire home including AC
  • ✓Generac or Kohler brand
  • ✓Sound-attenuated enclosure
  • ✓WiFi monitoring and alerts
  • ✓3-5 day professional installation

Frequently Asked Questions

How much does Whole House Generator Installation cost?

The average cost for Whole House Generator Installation is $7,500. Actual costs vary based on project complexity, materials chosen, labor requirements, and your location. Get multiple quotes for accurate pricing.

How do I choose the right contractor?

Look for licensed, insured contractors with good reviews, local references, and transparent pricing. Get detailed written estimates from 3-4 contractors. Avoid door-to-door solicitors and unusually low bids.

What should be included in the estimate?

A complete estimate should include materials, labor, permits, cleanup, timeline, and warranty information. Be wary of estimates that seem too vague or don't itemize major components.

What payment schedule is standard?

Typical schedule: small deposit (10-15%) to start, progress payments at milestones (30-40% each), final payment (10%) after completion and inspection. Never pay 100% upfront. Large upfront demands signal risk.

How can I verify a contractor's credentials?

Check state licensing board, verify insurance with provider directly, search court records for liens/lawsuits, check Better Business Bureau rating, read recent online reviews across multiple platforms, and ask for client references from past 6 months.

Get Matched with Local Contractors

We'll connect you with up to 4 qualified professionals in our network who will contact you at the phone number you provide.

📞 Expect calls within 1-2 business days to discuss your project

Enter 10 digits (e.g., 2145551234)

Enter 2-letter state code

How it works: We connect homeowners with qualified service professionals through our partner networks. By submitting your information, you'll be matched with up to 4 contractors who can provide quotes for your project.

By clicking "Get Matched" below, you agree that ServiceCostPro and our partner networks may contact you at the phone number provided using automated phone calls and text messages. Your consent is not required to purchase any goods or services. Message and data rates may apply.