Construction Guide · I'On, SC

New Construction Cost Guide for I'On, SC

I'On's strict architectural pattern book and premium finish requirements push construction costs above typical Mount Pleasant new-build pricing — this is a neighborhood where the design review process shapes the budget as much as the lot itself.

A Private Design Review Drives Real Cost Before the Building Permit

The I'On Design Committee, operating under the I'On Assembly HOA, requires approval to a "Lowcountry Vernacular" pattern book before the Town will issue a building permit. Approved siding is limited to wood clapboard, Hardie Artisan plank, board and batten, brick, or stucco — artificial brick veneer isn't allowed. Front porches must run at least 8 feet deep and cover 40% of the home's façade width, and detached garages are capped at 625 square feet with specific alley-loaded placement and door requirements. Each of these locks in cost and design decisions well beyond a standard production build.

Flood Zone Varies Sharply Across the Neighborhood

Most of I'On sits in FEMA Zone X, outside mandatory flood insurance requirements. But the neighborhood's north and northwest edge, bordering the Lafayette Canal and marsh draining to Hobcaw Creek, carries an AE designation with base flood elevations of 9 to 10 feet — requiring flood insurance if the home is financed. Confirm your specific lot's flood zone before pricing foundation type.

Where I'On Pricing Lands

Charleston-area custom construction runs roughly $175 to $225 per square foot for standard product, $225 to $300 for mid-range, and $300 to $350-plus for high-end work, with true luxury builds in prime locations exceeding $700 per square foot; coastal elevation and hurricane-rated systems add a further 15-30% premium. I'On's mandatory architectural detail — approved materials, required porches, alley-loaded garages — pushes most builds here toward the upper end of that range.

Planning new construction in I'On and want a budget built around the design review process from day one? Contact Chris Eller directly.