Widening Doorways for Wheelchair Access: What Chicago Suburb Homes Actually Require

The bathroom door in most pre-1980 North Shore homes measures 28 or 30 inches wide. That seems close to the 32-inch clear minimum for wheelchair access - but the difference matters. A 28-inch door provides approximately 26 inches of clear opening after the door hardware and frame reduce the passage. A 30-inch door provides approximately 27.5 to 28 inches clear. Neither comes close to the 32-inch minimum.

Getting to 32 inches clear requires a 36-inch door, because the door slab, frame, and hardware consume approximately 2 inches on each side of the rough opening. Getting to 36 inches clear - the residential best-practice recommendation that accommodates most wheelchair types comfortably - requires a 40-inch door. That means new framing, a new rough opening, and almost certainly a permit. In a home built before 1940, it also means a structural assessment.

Our accessible bathroom remodeling services cover what a complete accessible bathroom project involves beyond the doorway itself, and the accessible bathroom design guide covers the technical design standards in detail.

The 32-Inch Clear Opening: What the Standard Actually Says

The ADA 2010 Standards specify 32 inches clear as the minimum wheelchair passage width for a forward pass-through, measured at the narrowest point of the opening. These standards apply legally to public accommodations and commercial facilities, not to private single-family residences. However, they are the design benchmark for residential accessible work, and they are what architects, accessibility consultants, and the NAHB Certified Aging-in-Place Specialist curriculum use as the reference.

For residential future-proofing, 32 inches clear is the floor, not the target. Most accessibility consultants and the NAHB aging-in-place framework recommend 36 inches clear in residential settings for several practical reasons:

• Standard manual wheelchairs vary from 24 to 28 inches wide at the wheels
• Power wheelchairs and scooters commonly run 24-28 inches wide but need additional maneuvering clearance at the door approach
• Walker and rollator users benefit from wider clearance for maneuvering in the doorway
• Future wheelchair types may be wider than current models

The practical advice for any North Shore bathroom doorway widening: widen to the maximum the existing framing allows during the remodel, not to the minimum. The marginal cost of going to 36 inches clear versus 32 inches clear is a few hundred dollars in framing. The cost of revisiting the work in ten years if 32 inches proves insufficient is the full project cost again.

Non-Load-Bearing vs. Load-Bearing Doorway Widening

The cost and complexity difference between these two categories is significant.

Non-load-bearing doorway widening. A non-load-bearing wall carries no structural weight from floors or the roof above. The framing is dimensional lumber running between the floor plate and ceiling plate as partition walls. Widening the opening involves removing drywall on both sides of the doorway, cutting the existing studs, installing a new header (horizontal member) above the opening, adding trimmer studs on each side, framing in any additional space needed, and patching and painting the wall.

This scope typically runs approximately $600-$2,000 in the Chicago area depending on the extent of drywall work, whether flooring needs to be extended into the widened threshold, and local labor rates.

Load-bearing doorway widening. A load-bearing wall supports the weight of the floor or roof structure above and transfers it to the foundation through the load path. Widening its doorway is a structural engineering problem. The sequence:

1. A structural engineer specifies the header size - typically a built-up LVL (laminated veneer lumber) beam or steel moment connection - based on the span, the load above, and the specific wall’s position in the structure
2. Temporary shoring supports the floor or roof above while the existing framing and header are removed
3. The new engineered header is installed, with proper bearing on trimmer and king studs
4. Shoring is removed and load transferred to the new header
5. Wall is patched and finished

The structural engineering assessment typically costs $500-$1,500. The header and installation add $2,000-$4,000 depending on the span. Total cost for a load-bearing doorway widening often runs $3,000-$6,000 or more, versus $600-$2,000 for non-load-bearing.

Why Pre-1940 North Shore Homes Need Structural Review Regardless

In Kenilworth, Wilmette, Winnetka, Glencoe, and the other communities that built out primarily before 1940, the framing system is typically balloon framing. In balloon framing, wall studs run continuously from the foundation sill plate to the roof rafters without the platform breaks that separate floors in modern construction. This creates a fundamentally different structural behavior than platform framing.

The key issue with balloon framing for doorway widening is that load paths are less intuitive. What appears to be a partition wall may carry load through a stud that runs past the floor level to support the second floor or roof structure. What appears to be a load-bearing wall may in fact be supported by a concealed steel beam in the basement. These conditions cannot be reliably determined from a visual inspection of the finished surface.

The practical guideline: in any home built before 1940 on the North Shore, have a structural engineer review any wall before its opening is widened, regardless of whether the wall “looks” like it carries load. The engineering assessment costs a fraction of the repair cost if a load-bearing member is cut without support.

Doorway Solutions When Width Is the Constraint

Some North Shore bathrooms present a different problem: the framing can be widened, but the bathroom itself is too small to swing a 36-inch or 40-inch door without it blocking the toilet or vanity when open.

Three alternatives that achieve accessible clear width without the swing-radius problem:

Pocket door. A pocket door slides into a cavity in the wall rather than swinging. It creates zero door-swing interference with adjacent fixtures, maintains the full clear opening width when open, and allows a 36-inch or wider rough opening in the same wall space as a standard door. The wall cavity requires sufficient depth (at least 4 inches) and the installation involves framing a pocket into the wall. Not appropriate for load-bearing walls. Cost adds approximately $500-$1,500 to the doorway widening scope for the pocket frame kit and hardware.

Barn door or bypass hardware. A door that slides on surface-mounted hardware past the wall face rather than into a pocket. Simpler installation than a pocket door, no wall cavity needed, and the door can be sized for the full accessible opening width. The drawback is that the door hangs outside the wall when open, which can conflict with light switches or adjacent wall space.

Offset hinges (expandable hinges). For doorways that are close to accessible width but not quite there, offset hinges add approximately 1.5-2 inches of clear width by moving the door swing point outward. A 30-inch door with offset hinges can achieve approximately 32 inches clear in some configurations. This is the least invasive option and does not require a new rough opening, but it only works when the existing door is already close to the minimum.

The Full Accessible Sequence: Doorway First

Doorway widening is typically the first item in an accessible bathroom remodel sequence, because the door opening determines the bathroom layout. You cannot plan a wheelchair turning radius, fixture placement, or curbless shower entry until you know what the entrance clear width will be.

The sequence:

1. Assess the doorway wall for load-bearing status (engineering review in pre-1940 homes)
2. Determine target clear width - 32 inches minimum, 36 inches recommended
3. Select door style - swing, pocket, or barn door based on the bathroom layout
4. Obtain permits (most Chicago suburbs require permits for structural doorway modifications)
5. Frame the new opening; patch and finish
6. Proceed with interior accessible design based on the confirmed entry dimensions

For the complete technical specifications that an accessible bathroom requires - grab bar blocking to 250 lbs in any direction per the U.S. Access Board, curbless shower slope, turning radius - see the accessible bathroom design guide. For what the accessible kitchen equivalent involves, see the accessible kitchen remodeling services page.

For cost context across the full accessible remodel scope, see the accessible bathroom remodel cost guide for the North Shore.

We widen doorways and design accessible bathrooms across the North Shore, including Highland Park, Wilmette, and Winnetka.

Schedule a consultation with Delta - Bathroom and Kitchen Remodeling to discuss doorway widening and accessible design in your specific home. An in-home visit is the only accurate way to assess the structural situation and determine what approach achieves the accessible clear width your household needs.