Home Additions in St. Charles, Missouri

St. Charles homes and this kind of project

A home addition in St. Charles means working in everything from 1800s brick to 1990s subdivisions, so on our first visit we look at the plat, setbacks and easements, then floor heights, rooflines and HVAC capacity.

The housing stock here: nineteenth-century brick in the historic core, early twentieth-century bungalows and four-squares in midtown, postwar ranches, 1980s to 2000s subdivisions to the west and south, and New Town's neo-traditional homes.

An addition to an old house is set back and kept subordinate, with matching proportions, and may need board approval.

Lots, exteriors and approvals in St. Charles

Historic district properties need approval for exterior changes, including windows, siding, porches and sometimes paint colors. Wood porch restoration is common. Elsewhere, decks, patio covers and siding replacement are the routine exterior jobs.

Adding onto an old St. Charles house is a design problem first. Rooflines, window proportions, siding exposure and foundation height all have to relate to the original, and review boards in historic areas will insist on it. We set additions back and keep them subordinate to the main house.

What is included

A St. Charles addition with us includes feasibility review, design, structural engineering, permits, excavation, foundation, framing, roofing, windows, exterior finishes, all mechanical trades, insulation, drywall, flooring, trim and paint.

We take on home addition work across St. Charles, from Historic Main Street to Frenchtown and New Town at St. Charles.

What we watch for

Matching discontinued siding colors and weathered shingles on St. Charles homes takes planning. Sometimes re-siding or re-roofing one full elevation gives a better result than trying to blend.

Site logistics matter: St. Charles has tight historic blocks near the river and ordinary suburban lots farther west, so we agree with you where an excavator, a foundation crew, framers, a roofer and every interior trade will park, store material and carry out debris.

Permits and approvals in St. Charles

The City of St. Charles is where we file for a home addition in St. Charles, and the job will see plan review plus footing, foundation, framing, trade, insulation and final inspections.

Since this work shows from outside, also plan on historic preservation review in the old districts. We prepare that submittal alongside the permit.

Schedule and getting to you

Most St. Charles clients see three to six months of construction for a home addition.

St. Charles is about half an hour east on I-70, or along Highway 370 to the north side from our Wentzville base. We plan crew days and deliveries around that drive so you get full working days on site.

What moves the price in St. Charles

We price home additions in St. Charles from a site visit, not a square-foot figure. These are the items that change the number.

• What the rooms are. A bedroom costs less per foot than a kitchen or bath.
• Complexity of the roof tie-in and exterior matching, especially brick.

More detail

Our step-by-step method for this work, and the factors that move its price, are laid out on the main home additions page. More about the area is on our St. Charles page.