Renovating a ranch, split-level or Cape Cod in the Chicago suburbs

Many homes in the Chicago suburbs were built in the decades after the Second World War. They often have room to grow but dated kitchens, small bathrooms and closed-off layouts.

Predominantly mid-twentieth-century suburban types, with Cape Cod forms also drawing on earlier precedents.

Ranches spread living across one level, split-levels organize short flights around distinct zones, and Cape Cods place compact rooms beneath a steep roof. They share a practical scale but need different planning responses.

Retain, repair, reproduce or replace?

RetainKeep sound character-defining material in place.
RepairCorrect the cause and preserve usable material.
ReproduceUse documented evidence when a missing feature matters.
ReplaceUse compatible new work when condition or present needs require it.

Use evidence from the actual house. A property-specific assessment is still required.

Read the house first

Identifying details

Ranch: long, low roof and direct relation to the yard
Split-level: staggered floors connected by short stairs
Cape Cod: compact mass, steep roof and upper rooms within the roof volume
Attached garages and later additions are common variables

Exterior materials

Keep roof geometry and entry scale coherent. Replacement windows, siding and garage changes should follow the house’s horizontal or compact rhythm rather than applying an unrelated historic costume.

Spatial planning

Ranches can support accessible circulation but long mechanical runs need coordination. Split-levels demand careful stair, guard and sightline work. Cape Cod upper floors require honest headroom, insulation and egress analysis.

Interior language

Windows, doors, trim, floors & stairs

Mid-century houses often suit restrained trim, broad openings and simple built-ins; Cape Cods can carry smaller-scale painted or natural woodwork. Flooring transitions should reinforce the plan rather than fragment it.

Furniture, lighting & color

Ranches and split-levels respond well to warm woods, brick, stone, textured fabrics and focused modern fixtures. Cape Cod rooms benefit from lighter surfaces, smaller furnishings and compact lighting under sloped ceilings.

A low, horizontal brick ranch house with broad windows and a sheltered entry. — Ranch house

A brick and siding split-level house with staggered rooflines and an attached garage. — Split-level house

A compact Cape Cod revival house with a steep roof, dormers and symmetrical windows. — Cape Cod revival house

Kitchens and baths

Open a kitchen only after understanding structure and circulation. Put bath ventilation and plumbing routes on the drawings early, especially where upper rooms sit inside roof framing.

Restore or adapt?

Improve insulation, air sealing and glazing as a coordinated enclosure project. Additions should continue the house’s roof logic without creating valleys and junctions that invite water problems.

Where professional work begins

Never assume a low interior wall is nonbearing or that attic space can become a room; structure, egress, insulation and mechanical conditions need verification.
A style guide is a starting point, not a diagnosis. Original drawings, physical evidence and later alterations matter more than a label.
Bring in the appropriate architect, engineer or specialist before changing structure, egress, masonry, roofing, mechanical systems, plumbing, electrical work or gas service.
Before disturbing painted or concealed materials in an older house, determine whether lead or asbestos may be present. Do not sand, cut or remove suspect material as a discovery exercise.

Sources and further reading

These sources explain preservation principles and regional context.

What it is

Across metropolitan Chicago, bungalows lost favor with buyers after World War II, and ranches and split-levels became the dominant house forms in newly built areas.
Source: Bungalows, by Joseph C. Bigott (Encyclopedia of Chicago, archived copy) (opens in a new tab)
Ranch and raised-ranch homes (1940s-1970s) are asymmetrical with low-pitched roofs and wood or brick cladding, one story or two if raised. Split-levels (1950s-1960s) have two or three levels, with the garage and family room lowest and bedrooms upstairs.
Source: Chicago Vintage Home Styles (Chicago Bungalow Association) (opens in a new tab)
Cape Cods in the Chicago area (1930s-1960s) are typically brick, one and a half stories with a front gable, and belong to the Minimal Traditional trend in small homes, resembling pared-down Tudor Revivals with lower roof pitches.
Source: Chicago Vintage Home Styles (Chicago Bungalow Association) (opens in a new tab)

Renovating one today

The U.S. Consumer Product Safety Commission says homes built before 1965 rarely have aluminum branch-circuit wiring, but wiring installed from 1965 to the mid-1970s, in new homes, additions or rewires, may be aluminum, whose connections can overheat.
Source: Repairing Aluminum Wiring, Publication 516 (U.S. Consumer Product Safety Commission) (opens in a new tab)
Illinois public health officials say central and northern Illinois have higher radon levels in soil and that lower floors such as basements tend to test higher. The state emergency management agency licenses radon testing and mitigation professionals.
Source: Radon FAQs (Illinois Department of Public Health) (opens in a new tab)

Programs and resources

Home Energy Savings Program (Chicago Bungalow Association with ComEd, Nicor Gas, Peoples Gas and North Shore Gas) (opens in a new tab)
Income-qualified energy assessment and weatherization help for homes located within ComEd's service territory.
Illinois Property Tax Assessment Freeze for historic residences (opens in a new tab)
Statewide program that also covers locally designated landmarks in Illinois communities whose preservation ordinances are approved for it, so it applies only to suburban homes with historic status.

How we approach it

Opening up a layout is planned around what the walls are actually carrying, checked with a structural engineer where needed, before it goes into the written scope.

Each suburb has its own permit office and rules. Our area pages link to the official source for each one.

Services that fit

Facts on this page were checked on September 30, 2026. Follow the source links for the full details.

Suburban homes