At RKM Homes we treat universal design as a foundation, not an afterthought — starting on the blueprint so accessibility, comfort and long-term flexibility are baked into the floor plan and site work. Designing and building on a client’s lot in the Denver area means we account for topography, prevailing sun and seasonal freeze-thaw cycles when placing entries, paths and garages so you can achieve zero-step or low-threshold approaches, covered landings and easy driveway-to-entry transitions. Early attention to lot grading and orientation reduces expensive retrofits later: a slightly regraded approach, a relocated garage, or a shallow ramp tucked into the landscape can create true universal access without compromising curb appeal.
Practical dimensions and details get translated into the drawings so contractors know exactly what to build. We commonly specify 36-inch exterior doors and a minimum 36-inch clear hallway with a 60-inch turning circle in key living spaces to accommodate wheelchairs and mobility aids, curbless showers with built-in seats and handheld wands, and toilet heights in the comfortable 17–19 inch range. Kitchens and baths are drawn for multi-height counters and knee-accessible stations, pull-out shelving and roll-under sinks, lever hardware, rocker light switches and outlets placed at accessible heights, slip-resistant flooring and generous lighting and sightlines — all of which improve day-to-day use for every age and ability.
Blueprint-level planning also includes future-proofing and coordination: we dimension reserve spaces and structural backing for later installs (wheelchair lifts, residential elevators, grab bars), include mechanical and electrical rough-ins for smart controls and automated doors, and document materials and tolerances so subcontractors deliver consistent results. We collaborate with homeowners, designers and, when appropriate, accessibility consultants during schematic and construction-document phases to balance local code, budget and personal needs — producing a set of plans that build a beautiful, durable home that’s welcoming now and adaptable for decades.
How do I design site access, entries, and parking to be universally accessible?
From the builder’s side I start the blueprint at the property line: orient the driveway and primary parking so the shortest, gentlest route ties into the main entry. Keep the approach slope as shallow as site constraints allow — aim for walkways under about 5% where possible — and reserve space for a level landing directly outside the door. If the property grade forces a rise, lay out where a ramp run or switchback will fit early in the site plan (so it doesn’t conflict with utilities, landscaping or sight lines) and locate gutters and drains to move water away from that path.
Make the parking and drop-off practical for day-to-day use: place at least one designated accessible stall or a garage/driveway spot within a few yards of the entry, and provide an adjacent clear access aisle for loading/unloading. On custom builds we often detail a covered drop-off or porte-cochere so someone can exit a vehicle protected from weather; when a garage is used, plan the garage-to-house route as a zero-step path into a mudroom or entry vestibule to avoid outdoor transfers. Coordinate stall width and the aisle width with your local code and with the mobility needs of household members — the plan should show clear maneuvering room at the vehicle and at the entry landing.
Detailing and maintenance considerations keep access usable year-round in Denver’s climate. Specify firm, slip-resistant paving (tight joints, textured concrete or pavers), minimize changes in surface plane at transitions, and show dedicated snow-storage areas on the site plan so shoveled snow won’t block the route. Provide a sizeable covered entry or recessed landing where people can pause to buckle a child, stow a walker or put on outerwear, and leave room in your layout for future add-ons (a portable ramp, a vertical lift or a wider covered landing) by keeping walls and adjacent slabs free of obstructions and noting structural backing where hardware might later be anchored.
What doorway, hallway, and circulation clearances should I plan for to make a custom home truly usable for everyone?
As a custom home builder I recommend planning for wider clear openings than the absolute minimums — call for 3’0″ (36″) clear doorways on all primary routes and at least 44–48″ hallways where the floor plan allows. A 36″ clear door makes it easy for wheelchairs, walkers, strollers and movers, and a 44–48″ corridor gives two people comfortable passing room and makes furniture moves far simpler. On the blueprint, mark “36” clear minimum at all primary interior and exterior doors” rather than leaving widths to the trim package, and coordinate that width with door hardware and trim so the clear opening isn’t reduced by casing or thresholds.
Show turning and maneuvering clearances on the plan — a 5‑foot (60″) diameter turning circle (or an equivalent T‑turn) in the living room, primary bedroom, kitchen work area and at primary entrances will prevent bottlenecks and make daily tasks easier. Where space is tight, note alternative solutions on the blueprint: pocket or sliding doors at bathrooms and closets, 42–48″ clearances between kitchen counters (wider if you expect two cooks), and 18″ of clear landing on the latch side of doors so someone using a mobility aid can approach and operate the door. Specify continuous, low‑profile thresholds and flush flooring transitions on the drawings so changes in floor height don’t create barriers.
On the construction side, build in future flexibility: plan rough openings for 36″ doors (or larger) even where you might install a narrower door today, reserve adjacent closet or storage space that can be reallocated to widen a corridor later, and specify pocket door framing where you want a no‑swing option. Note on the plans to reinforce jambs and blocking in key walls so you can add grab rails, handrails, or wider door hardware later without major demolition. Finally, use full‑scale templates during the permit and framing stages to verify clearances are working with actual furniture and appliance layouts before finishing.
How do I design an accessible kitchen and bathroom that follows universal design principles?
Start at the plan stage by dimensioning circulation and clear floor space on the blueprint. I always place a 60-inch turning circle in at least one central area (kitchen or master bath) so a person using a wheelchair can turn without negotiation; if space is tight, show a 36″x60″ T‑turn. In kitchens, plan 42–48 inches between opposing counters for comfortable two‑person circulation and a minimum of 36 inches for single‑user aisles. In bathrooms, show clear floor space in front of the sink, toilet, and shower (aim for a 30″x48″ clear approach at fixtures) and indicate door swings that don’t block usable floor space.
Call out specific fixture and cabinet heights and types rather than leaving them as “standard.” On the blueprint, specify at least one lowered work surface (30–34 inches high) with a 27‑inch minimum knee clearance beneath for seated use, plus adjacent standard height counters to provide choice. Use pull‑out drawers and shelves, full‑extension drawers in base cabinets, and locate everyday storage between about 15 and 48 inches above the finished floor so items are reachable from a seated or standing position. For appliances show side‑hinge or wall ovens at accessible heights, front‑mounted cooktop controls, drawer‑style dishwashers or dishwashers set slightly elevated, and refrigerators with accessible storage configurations—label these choices in your spec sheet on the blueprint so trades know exact mounting and rough‑in heights.
Design showers and toilets around safe, usable details that you can dimension now. Specify curbless (zero‑threshold) showers with a 60″x36″ or larger roll‑in or roll‑through area when possible, a built‑in bench at 17–19 inches high, a handheld shower on a slide bar, and a thermostatic valve set within reach from the bench—note these on the plan and include a linear drain or properly sloped floor detail. For toilets use a “comfort height” bowl (about 17–19 inches to the seat) and allow clear approach space; for sinks show wall‑hung or cabinet sinks with at least one roll‑under option and single‑lever or touch controls. Finally, call out non‑slip flooring and reachable lighting/switch heights on the blueprint so finish selections and electrical rough‑ins support the accessible layout.
How do I plan structural provisions and future adaptability into my custom home blueprint?
As a custom home builder I recommend treating adaptability as a structural discipline from day one rather than an afterthought. That means locating a utility/vertical core (mechanical room, stacked closets or a reserved shaft) where future systems—an elevator, stair lift, or enlarged plumbing stack—can be installed with minimal disruption. On the blueprint we call out this core, show a reserved footprint (commonly at least a 5′ x 5′ area for a compact elevator) and coordinate it with roof/attic access, venting and the mechanical layout so you won’t have to chase ductwork or cut through finished spaces later.
Specify reinforced framing and blocking in the plans so anchors and heavy equipment have solid attachment points. Ask that interior walls at bathrooms, stairs, and key circulation routes receive full-height plywood or 2x blocking between studs, and that ceiling joists over bedrooms and living areas be sized or laminated to accept a point load for a future ceiling lift or tracked system. Also request a heavier subfloor (3/4″ T&G plywood) and an engineered joist layout in areas where you may later place medical or mobility equipment—these are inexpensive to add during framing but costly to retrofit.
Make the blueprint include “future-ready” infrastructure notes: an electrical panel with spare capacity and space for a subpanel, reserved conduits between floors for low-voltage/medical wiring, and capped plumbing/drain stubs in locations where a main-floor bath or laundry could later be added. Label these provisions clearly on permit drawings and get the structural engineer to stamp load ratings for reserved beams or lifts so contractors know what’s in place. This approach gives you practical, measurable options for adaptation as needs change and keeps retrofit costs and downtime far lower.
How do I plan controls, lighting, finishes, and safety features for universal design?
As a custom home builder, I treat controls and lighting as part of the blueprint’s accessibility strategy, not an afterthought. Specify layered lighting zones on the plan — ambient, task, and accent — and show dedicated circuits for key areas (kitchen counters, stairways, bathrooms). Put switches and primary controls where they can be reached from a seated position by noting their heights on elevations; a practical approach is to plan switch locations at about chest height for someone seated and to place outlets for small appliances higher on islands and counters. Use large-paddle or rocker switches, lever handles, and plan for dimmers and motion/occupancy sensors in corridors and bathrooms; prewire for smart controls (a low-voltage bus or extra conduit) so future voice or app control can be added without opening walls.
Choose finishes on the blueprint with usability and safety in mind. Call out non-slip flooring materials for wet areas and level thresholds (or specify curbless shower details) so flooring transitions are obvious and safe; indicate matte or low-glare finishes and contrasting colors where edges matter (stair nosing, countertop-to-cabinet junctions) to help people with low vision. Specify easy-clean, durable surfaces (porcelain tile with a high coefficient of friction, quartz counters with eased edges, low-VOC paints) and universal hardware — lever pulls, pull-out drawers, and full-extension shelves — directly on the millwork and finish schedules so contractors and suppliers match the accessibility intent.
Make safety features integral to the structural and mechanical notes on the blueprint. Show blocking locations in stud walls for future grab bars and handrails, and call out reinforcement in shower and toilet walls at the design stage so bars can be fitted without demolition. Specify anti-scald devices (thermostatic mixing valves) in plumbing notes, plan for visual and audible alarms in sleeping areas and living spaces, and call out continuous handrails and contrasting stair nosing in the stair detail. Putting these items on the plans — with exact locations for blocking, wiring, and finish transitions — saves cost and preserves options for aging-in-place adaptations later.