An indoor play space beats an outdoor playhouse in Colorado Springs for one simple reason: the weather never touches it. We get more than 240 sunny days a year here, but I’ve been out at a client’s place on a January morning at -10°F, watched an October snowstorm bury a playset overnight, and patched July hail dings on a roof. Indoors there’s no sun fading, no swings between wet and dry, and no cold or heat extremes, which opens up the full range of stage-set materials: fabric, wallpaper, detailed murals, padded seating, and raised textured surfaces. From building sets for shows like The Lion King to La Tosca, this is the build where I get to go all in on the design (my favorite kind of project).
Why Does Scale Matter More Than Size for an Indoor Play Space?
The mistake I see most often: homeowners assume a bigger space makes a bigger impact. It doesn’t. A large themed room with half-finished details works less well than a small space that fully commits to its world.
Children experience space at a different scale than adults. A low ceiling feels cozy and secret to a child, not cramped. A door you have to duck through signals that you are entering a different world. A window set at a child’s eye level, not an adult’s, frames the right view.
The best indoor play spaces use scale on purpose. The under-stair den (usually 6–8 feet deep, 3–4 feet wide, with a ceiling that starts at 7 feet and slopes down to 2 feet) is already built to a child’s scale. You don’t have to change anything to make it feel like a hideaway. The shape of the space does the work.
Before you decide how big the space should be, decide what it should feel like. Cozy and secret: smaller is better. Epic and adventurous: go larger, with different ceiling heights and several zones. Active and physical: leave enough headroom and open floor for moving around. Creative and hands-on: use surfaces kids can touch and play with, plus built-in features that set the scene.
The Concepts: What Indoor Play Spaces Can Be
The Under-Stair Den
The space under a staircase is one of the most wasted spots in a house, and I’ve cleared out more dead space under a staircase than I can count. In most Colorado Springs homes it is either storage or nothing: a triangular area that is too odd-shaped to use as a real room but too valuable to ignore.
Turned into a play den, it becomes one of the most magical spaces in the house, exactly because of its small size and odd shape. The entry is the doorway to another world: usually a small door cut into the stair wall, sized for a child so an adult has to duck. The triangular space beyond it is built to a child’s scale.
The hobbit hole: The under-stair space already has a round, natural shape to it. Line the inside with curved panels, paint the door frame as a rounded opening, and add warm, soft lighting. The result is a Shire-style hideaway that costs a fraction of an elaborate outdoor build. The round door is the detail that changes everything. You can build it from plywood, cut it into a circle or oval, and paint it to look like old timber.
The pirate cave: Dark walls, rope details, and a porthole window: a round opening in the inside wall, fitted with a clear acrylic panel, that looks into a lit display or the next room. Add a treasure chest, which is really built-in storage with pirate-style hardware. The cave look works with the low ceiling at the deep end. It feels like you have crawled into something.
The reading cottage: Warm wood paneling, a cushioned bench at the back, shelves built into the sides, and a canopy of string lights overhead. Add one good reading light on a dimmer. This is the most practical under-stair build and the easiest for older kids to grow into.
The Bedroom Loft and Reading Nook
A bedroom with a tall enough ceiling (usually 9 feet or more) can fit a sleeping loft, which adds a second level inside the room. The space under the loft becomes a den, a reading nook, a play area, or a study spot. The sleeping platform up above stays raised and private.
The loft frame itself is the canvas for the theme. A castle theme puts crenellated railings on the loft, meaning the notched, tooth-like top edge you see on castle walls. You cut them from plywood and paint them to look like stone. A treehouse theme uses posts shaped like branches and a leafy canopy over the sleeping surface. A cabin uses rough log-look posts and a wood-plank ceiling on the loft platform.
The critical code point: If a loft counts as a “sleeping room” under the building code, it has to meet rules for egress and ceiling height. Egress means a legal escape route: a window or door big enough to climb out of in a fire. Check with the Pikes Peak Regional Building Department before you build. A loft used only as a play area, not for sleeping, has fewer rules to meet. Most built-in bedroom lofts in Colorado Springs are cosmetic add-ons to an existing room and don’t trigger a formal code review. Still, the difference matters if you ever sell the home or have it inspected.
The reading nook: A built-in window seat with storage underneath and bookshelves on each side of the window is one of the longest-lasting features you can add to a child’s room. You carry the theme through the seat frame, the shelf details, and the cushion. It needs no major structural work, it creates a clear “special place” inside a larger room, and it grows with the child from picture books to chapter books to the teenage years.
The Room Conversion
A dedicated playroom (a spare bedroom, a bonus room, or a den handed over to the kids) is a full-room canvas. Here the theme covers all four walls, the floor, the ceiling, and every built-in piece.
The forest room: A mural wraps all four walls into one continuous forest. Tree-trunk shapes stand at the corners, built from framing lumber and foam and textured to look like bark. A branch-shaped canopy hangs from the ceiling with built-in LED lighting that mimics sunlight coming through leaves. The carpet is a natural green. This is the most immersive approach and the closest thing to a stage set inside a home.
The castle great hall: Stone-pattern wall panels (carved foam or cement board) on the outer walls. A painted banner or coat-of-arms as a focal point. Built-in seating with hidden storage that looks like a window seat or a throne-room bench. An arched frame around the doorway. A built-in “fireplace” as the centerpiece: it doesn’t work, but it is detailed to look real at a child’s scale.
The spaceship: The hard part of a spaceship room is the shape. Straight walls and a flat ceiling don’t look like a spacecraft on their own. The fix is added surface detail. Use dark paint or trim to draw grid lines on the walls, so they look like the metal hull panels on a ship’s body. Add rows of dome-head screws or bolt caps to look like rivets. Build a cockpit zone: a set-back section of wall with an “instrument panel” made from real hardware, meaning switches, gauges, and lights. That becomes the room’s centerpiece. Lighting matters most here. Use cool-white LEDs, recessed and aimed, to copy the tight, controlled light of a spacecraft instead of the warm light of a normal room.
The Basement World
A full basement is the biggest canvas you have for an indoor play space. It also gives you the most freedom. It sits below grade (below ground level), it is usually unfinished or barely used, and you have the whole floor-to-ceiling space to work with without touching the living areas upstairs.
A basement is where the full stage-set approach becomes possible. You can build several zones in one large space: a dungeon entry room that opens into a great hall and then an armory, a forest entrance that deepens into a cave, or a spaceship hallway that opens onto the bridge. You move between zones with simple building features: an arched doorway, a change in ceiling height, or a different floor surface.
The code point: A finished basement in Colorado Springs may need egress windows in any room people live or sleep in. Egress windows are windows large enough to climb out of in an emergency. Check with PPRBD (the Pikes Peak Regional Building Department) to see whether your plans trigger this rule. A play space that also gets used for sleeping (kids at a sleepover, or a movie room that doubles as an occasional bedroom) falls under stricter rules than a space used only for play.
The material freedom: In a heated, dry basement, you can use the full range of stage-set materials. Wallpaper, which won’t hold up in an outdoor playhouse, works fine on inside walls. You can use fabric for canopies, booth seating, or accent walls. You can paint detailed murals without worrying about the sun fading them. The build stops being an “outdoor structure” and becomes a “finished room.”
What Surface Treatments Make Indoor Spaces Believable?
Indoor builds get access to a wider range of surface treatments than outdoor builds ever will, and this is where the stage-set background pays off. The ones that produce the most dramatic results:
Sculpted foam panels: Sheets of EPS foam (the white rigid foam used in packaging and insulation) can be carved, shaped, and painted to look like stone, brick, rock, or bark. The panels are light and fairly cheap. You glue them to the wall, paint them in several layers of color to build up depth, and seal them. Up close you can tell it is foam, but from arm’s length and back the illusion holds. It’s a standard stage-set trick (one I used long before I ever built one into a kid’s bedroom), just used here as a permanent part of the room.
Raised wall details: Wood strips, molding, and shaped pieces added to a flat wall create shadow and depth. In a forest room, instead of the straight strips of standard wall paneling, you can use curved, uneven edges that suggest bark or the outline of leaves. From a distance, these raised details read as texture and depth.
Trompe l’oeil murals: Trompe l’oeil is a French term that means “fool the eye.” These are murals painted to look three-dimensional: a painted forest that seems to keep going past the wall, a painted sky on the ceiling that looks like open air, or a painted castle window that looks out onto a painted landscape. These take a skilled muralist, but the result is the most immersive surface you can add. In a fully themed room, the trompe l’oeil wall is the painted backdrop behind the rest of the set.
Built-in lighting: In a themed space, lighting does as much work as any surface. An LED strip hidden at the edge of a canopy creates a soft glow. Small round recessed LED lights (called pucks) in a spaceship ceiling look like stars or instrument lights. Warm LEDs in a cabin give off a firelight glow. Put the lights on dimmers so the space can shift from a bright daytime mode to a cozy evening one, which stretches how much the space gets used.
Growing the Space With the Child
In my experience, the best indoor play spaces are the ones designed to grow with the child. A space built for a 4-year-old that still works at 10, and can shift to a new use at 14, gives you the best return on what you spent to build it.
The elements that grow well:
- Built-in storage (always useful, adapts to what’s being stored)
- Bookshelves (function regardless of age)
- A dedicated desk or study zone within the themed space (the spaceship cockpit becomes a homework station)
- Quality lighting (useful for reading, creating, studying)
The elements that age out:
- Very small-scale features. A child outgrows a 4-foot clearance door.
- Highly specific theming tied to a single moment in childhood (the exact characters of a current favorite property rather than the underlying world)
The design advice: build the world around the general idea, not a specific brand or character. A forest world outlasts one brand’s forest character. A castle outlasts one princess franchise. The original idea lasts longer than any licensed version of it.
For a conversation about an indoor play space for your Colorado Springs home, call (719) 243-9718.
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