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Professionally Built Window Catios – Custom Designs, No Kits

Professionally Designed & Built – No Kits or Prefab

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What is a Window Catio and Why Your Cat Needs One

How a Window Catio Works

A window catio is a secure, enclosed outdoor structure that connects directly to your home through a window. Your cat accesses it by stepping through an open window or a cat door, entering a space where they can enjoy the outdoors—without any of the dangers.

At Cat Topia, our window catios are fully custom-built to fit your space and lifestyle. Whether you prefer a permanent installation seamlessly attached to your siding or a freestanding design that rests beside your home, we tailor each build for aesthetics, durability, and feline enjoyment.

Ideal for Apartments, Small Spaces & Townhomes

Window catios are a perfect solution for pet parents with:

  • Limited backyard space
  • HOA or rental restrictions
  • Second-story windows
  • Urban environments with no ground access

 

Because they’re compact and mounted or freestanding, they work beautifully for condos, townhomes, apartments, and even multi-level homes with balconies or ledges.

Top Reasons Your Cat Will Thank You:

1. Safe Outdoor Access 

Your cat gets to sunbathe, watch birds, and feel the breeze—all without the risks of traffic, predators, or getting lost.

2. Boredom Buster

New smells, moving leaves, chirping birds—your cat enjoys a stimulating environment that curbs boredom and reduces anxiety-driven behaviors.

3. Health & Happiness

Fresh air and daily sunlight help regulate mood, reduce stress, and even improve sleep patterns—for you and your cat.

4. Enrichment for Apartment Living

Even in a high-rise or small patio, a window catio gives your cat a “room with a view.” It’s their private outdoor nook—without you needing a yard.

5. Peace of Mind for You

No more leash walks or open-window anxiety. Your cat gets the outdoor life you’ve always wanted for them, with the safety you demand.

Designed Just for Your Space | Not a One-Size-Fits-All Kit

Every Catio We Build is Unique

At Cat Topia, we don’t believe in out-of-the-box cat enclosures. Every catio we build, especially our window catios, is designed from scratch to fit your home, your cat’s habits, and your style preferences. Whether you’re in a modern condo or a craftsman bungalow, we tailor every structure to blend seamlessly with your architecture and meet your cat’s lifestyle needs.

Click here to learn how our process works

What Makes a Cat Topia Catio Truly Custom

  • Precision Fit for Your Window & Exterior – We design based on exact window measurements, siding type, and architectural style, so your catio looks built-in, not bolted on.
  • Built with Professional-Grade Materials – From chew-resistant welded wire mesh to weather-sealed cedar and heavy-duty brackets, we only use materials designed to last and most importantly keep your cat safe.
  • Designed for Safety, Styled for Your Home – Your catio will never be an eyesore. Each build balances feline function with curb appeal, so it complements your home’s design as much as it enriches your cat’s life.

Cat Topia Custom:

  • Designed to match your exact window & trim
  • Weather-sealed cedar, redwood, or pressure treated 
  • Welded steel mesh for durability & safety
  • Professionally installed or guided custom build
  • Integrated to blend with your home’s exterior
Before After cat in window catio design

Window Catio Examples – Custom Builds We’ve Done

Location: Thornton, CO

Catio Size: 40 inches wide x 39 inches tall x 24 inches deep

Structure: Window-mounted cedar catio built for compact spaces, offering secure outdoor enrichment with a minimalist footprint and clean design

Fencing Type: 1” x 1” black PVC-coated welded wire (Critterfence) for durability, airflow, and unobstructed visibility

Wood Type: Painted white cedar, selected for its natural weather resistance and ability to complement a wide range of home exteriors

Roof: Clear polycarbonate roofing for full sun exposure and protection from rain—ideal for year-round use without blocking natural light

Angled view of a tall, white framed window catio with mesh sides and a clear roof, securely mounted to a white brick wall above a brick patio.
Outdoor side view of a small white window-mounted catio with a clear polycarbonate roof and tall support legs on a brick patio.
Black and white cat peering through a small elevated window box catio attached to a white brick house, with two white patio chairs and a round glass table in front.

Location: Denver, CO

Catio Size: 5 ft wide x 2 ft tall x 2 ft deep

Structure: Window-mounted pressure treated catio built for a compact space

Fencing Type: 2″ x 3″ galvanized steel wire 

Wood Type: Painted blue pressure treated lumber, selected for its weather & rot resistance 

Roof: Corrugated metal roof, provides protection against all elemnts 

Front view of a small custom catio painted bright blue with wire mesh panels, angular wooden framing, and a corrugated roof, mounted below a window on a beige exterior wall.
Full view of a custom wall-mounted blue catio with an attached wooden tunnel ramp leading to a secondary window, set against a beige stucco house.
Close-up side view of a small bright blue catio with wire mesh, a pitched corrugated roof, and triangular decorative elements, mounted outside a house window.
A blue wall-mounted custom catio with geometric wood framing and wire mesh, supported by angled wooden posts and attached to a house window above a garden of blooming yellow flowers.

Location: Denver, CO

Catio Size: 7 ft wide x 3 ft tall x 2 ft deep

Structure: Freestanding design

Fencing Type: 2″ x 3″ galvanized steel wire 

Wood Type: Painted white pressure treated lumber, selected for its weather & rot resistance 

Roof: Pressure treated lumber with garden box on top

Custom catio with a rooftop garden, built beneath a window and filled with blooming flowers and greenery above an enclosed mesh cat space.
A low-profile white catio with a mesh enclosure and window access, positioned against a brick house and covered with a soil-coated roof.
Side view of a small white catio with a slanted soil-covered roof, mesh panels, and a built-in cat door connected to a brick house.
Two vertical white climbing posts with staggered perches, set against a rock-patterned wall inside a custom-built catio.

Location: Chicago, IL

Catio Size: 3 ft wide x 3 ft tall x 2 ft deep

Structure: Attached to window

Fencing Type: 2″ x 3″ galvanized steel wire 

Wood Type: sealed cedar, selected for its weather & rot resistance 

Roof: Clear Polycarbonate, selected for its uv resistant and provides great protection from weather

Elevated wooden catio with wire mesh and clear roof panels mounted on a stone exterior wall
Close-up view of wooden catio with gable roof and natural branch support mounted on a stone house
Wooden window-mounted catio with pitched roof attached to a stone exterior wall
White cat sitting in a soft bed inside a window catio with pitched roof and mesh siding

Ready to Design Your Custom Window Catio?

Your cat deserves more than a prefab box. At Cat Topia, every window catio is thoughtfully designed and built for your unique space, your home’s style, and your cat’s personality.

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