In-Law Suites & Multigenerational Living in O'Fallon, Missouri

O'Fallon homes and this kind of project

An in-law suite in O'Fallon means working in two-stories and atrium ranches from the 1985 to 2010 boom, so on our first visit we look at zoning limits on second kitchens, the HOA indenture and which part of the house suits the person moving in.

The housing stock here: mostly 1985 to 2010 production two-stories, ranches and atrium ranches, with older ranches and bungalows near the original town center.

Walkout basements in homes of this era make the most economical suites.

Lots, exteriors and approvals in O'Fallon

Decks from the 1990s are reaching the end of their life, and we replace many with composite. Wood brickmould and garage door trim rot at the base. Established trees give some lots good shade, but west-facing patios still call for a roof.

Subdivision lots in O'Fallon have defined building lines and easements, and HOA indentures that may be decades old but still binding. Most additions go to the rear. Matching vinyl or hardboard siding that is no longer made sometimes means re-siding a whole elevation.

What is included

We meet with O'Fallon planning staff or the county before finalizing the design, so the kitchenette, entrance and utility setup are approved on paper before construction money is spent.

We take on in-law suite work across O'Fallon, from Wyndgate to the Highway K corridor and old town O'Fallon.

What we watch for

Subdivision indentures in O'Fallon sometimes prohibit anything that resembles a second dwelling. We read them alongside the zoning code, because HOA approval is a separate hurdle from the building permit.

O'Fallon properties tend to be established subdivision lots with fenced rear yards, and that affects how we stage materials, where the full range of trades park and how debris leaves the site.

Permits and approvals in O'Fallon

In O'Fallon, an in-law suite is reviewed by the City of O'Fallon building division. What follows is zoning review plus the usual building and trade inspections.

Since this work shows from outside, also plan on neighborhood HOAs and, in WingHaven, a master association. We prepare that submittal alongside the permit.

Schedule and getting to you

Plan on six weeks to six months depending on the approach of site work for an in-law suite in O'Fallon, once permits and materials are in hand.

From our Wentzville base, O'Fallon is fifteen minutes or so east on I-70 or I-64. That is close enough that your project lead can stop by most days.

What moves the price in O'Fallon

We price in-law suites & multigenerational living in O'Fallon from a site visit, not a square-foot figure. These are the items that change the number.

• Exterior entrance, walkway and any ramp.
• Basement conversion versus addition versus garage conversion.

More detail

Our step-by-step method for this work, and the factors that move its price, are laid out on the main in-law suites & multigenerational living page. More about the area is on our O'Fallon page.