About this tool
A dog house is not a miniature human house. It is a den, and dogs judge dens differently than people judge rooms. A person wants space to move, but a dog wants a space that feels enclosed, warm, and safe, with just enough room to stand, turn around, and stretch out. A dog house size calculator translates your dog's body into those dimensions, so the house you build or buy fits the dog rather than your idea of a house.
The key measurement is shoulder height, taken from the ground to the top of the shoulders while the dog stands naturally. DogHouse uses that number to derive the rest: interior length about one and six-tenths times shoulder height, width about one and one-tenth times, height about one and a quarter times, and a door about three-quarters of shoulder height. A Labrador at 60 centimetres at the shoulder therefore gets a house about 96 by 66 by 75 centimetres, with a 45 centimetre door.
Why not simply build bigger? The answer is warmth. Dogs heat their sleeping space with their own body heat, and a house that is far too large cannot be warmed that way. In winter, a dog in an oversized house loses heat to the empty air around it and may sleep cold despite a thick coat. A snug house, by contrast, holds warmth through the night. The rule is counterintuitive to humans, who equate bigger with better, but for a den animal, snug is comfortable.
Length matters because dogs sleep stretched out as well as curled. A house that only allows curling forces the dog into one position all night, which is uncomfortable for older dogs and for dogs with joint problems. The length formula accounts for this by giving the dog room to lie with legs extended. Width matters for turning: a dog should be able to enter, turn around, and settle without backing out to reposition.
The door deserves as much thought as the walls. A door about three-quarters of shoulder height means the dog ducks slightly on entry, which is natural and comfortable, while the smaller opening keeps out rain, wind, and draughts. A door that is too tall lets weather in and lets warmth out. A door that is too small, on the other hand, forces a dog to crouch painfully or to avoid the house altogether, especially as the dog ages.
Placement is the next decision after size. A dog house should sit on raised ground that drains well, in a spot with shade in summer and shelter from prevailing wind in winter. The entrance should face away from the wind and rain, and the house should not sit in a hollow where water collects. A raised floor inside the house, even a few centimetres off the ground, keeps bedding dry and insulates against cold earth.
Materials and construction follow from the climate. Wood is the traditional choice because it insulates, breathes, and is easy to repair. A pitched roof sheds rain better than a flat roof and gives the dog a little extra headroom at the centre. A hinged roof is a practical luxury, because it lets you clean the house and change bedding without crawling inside. Avoid metal houses in extreme climates, because metal conducts heat and cold directly to the interior.
Bedding completes the house. Straw is a classic choice because it insulates even when slightly damp and dogs can arrange it into a nest. Blankets are comfortable but need frequent washing, and they lose insulation when wet. Cedar shavings smell pleasant and repel some insects, but some dogs are sensitive to them. Whatever you choose, bedding should be changed regularly, because a dirty house is a house a dog will avoid.
Age changes the equation. Puppies grow quickly, so a house bought for a puppy should be sized for the adult dog, with temporary bedding or a divider to make it feel snug while the puppy is small. Senior dogs need a house with a low threshold, a door they can enter without jumping, and extra bedding for stiff joints. A house that fitted a dog at three may need adjustments at twelve, and noticing that is part of good ownership.
Finally, remember that a dog house is a shelter, not a home. No house, however well sized, replaces time with people, exercise, and a warm place indoors in severe weather. Dogs are social animals, and the house should be a retreat the dog chooses, not a place of exile. Build it to the right size, place it well, keep it clean, and your dog will use it happily. That is the whole goal of DogHouse: a house measured to the dog, not to the catalogue.
Dog behaviour explains why a house should feel like a den. Wild canines rest in dens that are enclosed, dark, and just large enough, because such spaces are defensible and warm. Domestic dogs retain that preference, which is why many dogs choose to sleep under tables, in corners, or in crates with the door open. A dog house that mimics a den, with a small entrance and an enclosed interior, will be used voluntarily. A house that is open, draughty, or oversized will be ignored in favour of the porch.
Crate training and dog houses share principles, and owners who understand one understand the other. A crate is an indoor den, sized so the dog can stand and turn but not so large that the dog can soil one end and sleep in the other. A dog house follows the same logic outdoors, with the added needs of weather protection and durability. Dogs that are comfortable in a crate usually take to a well-sized house quickly, especially if bedding from the crate is moved into the house to carry a familiar scent.
Multiple dogs need a decision, not an assumption. Some bonded pairs sleep curled together and share a house happily, while others need separate spaces to avoid guarding the entrance or competing for the warmest spot. If you house two dogs together, size the house for the larger dog plus room for the second, widen the door, and watch for signs of tension, such as one dog hesitating to enter. When in doubt, two houses side by side give each dog a retreat and prevent most conflicts.
Winter care goes beyond insulation. Water bowls freeze, bedding gets damp, and paws suffer on ice, so a winter dog house needs a routine: fresh unfrozen water, dry bedding checked daily, and a path cleared of ice to the door. A door flap, which the dog pushes through, keeps wind out while allowing free entry, and it is one of the cheapest improvements to any house. In extreme cold, even the best house is not enough, and dogs should come indoors, because no outdoor shelter replaces a heated home.
Summer care is the mirror image. A dog house in direct sun becomes an oven, so shade is essential, either from a tree, a canopy, or a reflective roof. Ventilation matters too: vents near the roof let hot air escape, while the door lets cooler air in. Fresh water should be available outside the house, in shade, and bedding should be light and washable. A dog that pants heavily in its house is telling you the house is too hot, and the solution is shade and airflow, not a larger house.
Building your own house is a satisfying project, and sizing is only the first step. Use exterior-grade plywood or tongue-and-groove boards, seal joints against rain, and raise the floor on skids so air circulates underneath. Make the roof removable or hinged for cleaning, and avoid treated timber inside the sleeping area where the dog may chew it. Finish with non-toxic paint or stain, and let it cure fully before the dog moves in. A house built with care, to the right size, will serve for years and will be a place your dog genuinely chooses to sleep.
Frequently asked questions
How do I measure my dog for a dog house?
Measure shoulder height from the floor to the top of the shoulders while the dog stands naturally, and measure length from chest to base of tail. Shoulder height drives the house height and door size.
How big should a dog house be?
Large enough for the dog to stand, turn around, and lie stretched out, but not much larger. An oversized house loses body heat in winter and feels less secure to the dog.
Why should the door be smaller than the dog?
A door about three-quarters of shoulder height lets the dog duck in comfortably while keeping rain, wind, and cold draughts out of the sleeping area.
Should a dog house be insulated?
In cold climates, yes. Insulated walls, a raised floor, and a door flap make a large difference. In hot climates, shade and ventilation matter more than insulation.
What is the best floor for a dog house?
A raised wooden floor keeps the dog off cold, damp ground and allows air underneath. Add washable bedding on top, and avoid bare concrete in winter.
Can two dogs share one house?
Only if the house is sized for both dogs together and they genuinely get along. Most dogs rest better in their own space, and a shared house should be generously sized with a wider door.