Market facts for spray foam contractors in Charleston
Each figure links to its public source and shows the date it applies to.
Population
159,423
Estimate for July 1, 2025
Source: U.S. Census Bureau, Vintage 2025 population estimates for cities and towns. As of July 1, 2025.
County
Charleston County
County that contains the city's central point
Source: U.S. Census Bureau Geocoder (2020 county boundaries). As of 2020.
IECC climate zone
3A
humid climate, zone 3 of 8
Source: U.S. DOE and PNNL, Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270). As of October 21, 2022.
Heating degree days per year
1,623
Normal, base 65 F, measured at CHARLESTON CITY
Source: NOAA NCEI 1991-2020 U.S. Climate Normals. As of 1991-2020.
Cooling degree days per year
2,448
Normal, base 65 F, measured at CHARLESTON CITY
Source: NOAA NCEI 1991-2020 U.S. Climate Normals. As of 1991-2020.
Median year homes were built
1996
National median: 1981 (survey estimate, with a margin of error)
Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates, table B25035. As of 2024.
Homes built before 1980
34%
National: 48% (survey estimate)
Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates, table B25034. As of 2024.
Owner-occupied homes
54%
National: 65% (survey estimate)
Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates, table B25003. As of 2024.
Median home value
$600,300
Owner-occupied homes. National: $360,600 (survey estimate)
Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates, table B25077. As of 2024.
Drawn from the sourced figures above. No new numbers.
Homes built before 1980
Owner-occupied homes
Median home value
Heating and cooling load in a typical year
Degree days per year, a standard measure of how much heating or cooling a climate needs.
What this means for your marketing in Charleston
54% of occupied homes in Charleston are owner-occupied (nationally: 65%), and the median home value is $600,300 (nationally: $360,600). That is close to the national mix of owners and renters. Higher home values tend to go with owners who spend on comfort and performance, so quality, warranty and results messaging usually works better than leading with price.
Charleston is in Charleston County, which falls in IECC climate zone 3A. NOAA's 1991-2020 normals for CHARLESTON CITY (about 4 miles away) show 1,623 heating degree days and 2,448 cooling degree days in a typical year, so cooling is the larger load. For a spray foam or insulation contractor, that tends to move what homeowners search for toward hot attics, high summer energy bills and rooms that will not cool. The "A" in 3A marks a humid climate, so moisture control and air sealing deserve space in your content.
The Census Bureau's 2024 American Community Survey puts the median home in Charleston at a build year of 1996 (nationally: 1981), and 34% of its homes were built before 1980 (nationally: 48%). That is a younger housing stock than most of the country. A larger share of the work comes from new construction and recent builds, so builder and developer outreach deserves a place next to homeowner retrofit pages.
Charleston had an estimated 159,423 residents on July 1, 2025 (U.S. Census Bureau). Google Maps rankings change from one part of a market to the next, so being visible near your shop does not mean being visible across the whole service area. The free Market Visibility Audit shows your ranking at a grid of points around your business.
How the Google Maps grid works in a market like Charleston
Google Maps does not show one ranking for a whole city. The result changes block by block, depending on where the searcher is standing. Our audit searches from a grid of points around your business and records where you appear at each one. Green means you are in the top 3 at that spot. Red means customers there are not finding you.
Example from a client in Baton Rouge, Louisiana, not Charleston
Services for Charleston contractors
SEO Services for Insulation Companies
Rank higher on Google, attract the right local traffic, and convert visits into real leads with organic growth built for spray foam contractors.
Google Business Profile Optimization
Improve your Google Business Profile and local search visibility so your insulation company appears more often across Google Maps, manages reviews well, and turns views into phone calls.
Google Ads Management
Capture demand from homeowners and builders actively searching for a contractor right now, while your Google Maps and SEO visibility build behind it.
Facebook & Instagram Ads
Paid Facebook and Instagram campaigns with lead forms, landing pages and retargeting that turn homeowners scrolling their feed into estimate requests.
Website Development
Fast, mobile-friendly websites built for SEO, lead conversion, and trust, engineered to turn visitors into paying customers.
Reputation Management
Get more 5-star reviews, respond to feedback fast, and build a reputation that wins trust and wins more local jobs.
Results from other markets
These are real client results from the markets named. Client companies are not identified, and results vary by market.
Spray foam marketing in Charleston: FAQ
What climate zone is Charleston in, and why does it matter for my marketing?+
Charleston County is in IECC climate zone 3A (U.S. Department of Energy and PNNL, 2022). Climate zone drives what insulation work homeowners ask about, so it shapes which services and keywords to put first on your website and in your ads.
Is heating or cooling the bigger driver in Charleston?+
NOAA's 1991-2020 normals for the nearest weather station show 1,623 annual heating degree days and 2,448 annual cooling degree days. Cooling is the larger number, which is a useful starting point for choosing what to promote.
How old are the homes in Charleston, and does it change what I should sell?+
The Census Bureau's 2024 American Community Survey estimates a median build year of 1996 and 34% of homes built before 1980 in Charleston. A younger stock means new-construction work matters more, so reach builders as well as homeowners.
Do most people in Charleston own their homes?+
The 2024 American Community Survey estimates that 54% of occupied homes in Charleston are owner-occupied, compared with 65% nationally. Owners are usually the ones who buy insulation work, so this is the size of the group your marketing is aimed at.
How big is the Charleston market?+
The U.S. Census Bureau estimated 159,423 residents in Charleston on July 1, 2025. Population is only one input. The audit shows how many positions you actually hold on Google Maps across the area.
Do you have an office in Charleston?+
No. Our office is in Vancouver, Washington. We work with spray foam and insulation contractors across the United States and Canada.
How do I see where my company ranks in Charleston?+
Run the free Market Visibility Audit. It checks your Google Maps ranking at a grid of points around your business and shows the map in a few minutes.
Other areas in South Carolina
See where your company ranks in Charleston.
Get a free market visibility audit and see where you show up, and where you do not, across your service area.
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