DIY Dog Ramp: Should You Build or Buy One?
A dog ramp is one of the simplest things you can build in a weekend, and one of the easiest to get wrong in ways you won't notice until your dog refuses to use it. Before you cut any wood, it helps to know what a ramp actually has to do: hold a moving animal at speed, on an angle, sometimes in the rain, for years.
Most people start this project for one of three reasons. Cost is the obvious one: a sheet of plywood and some hinges cost less than a finished ramp. The second is fit: your car boot, your sofa height, your dog's stride length, none of it is standard, so a ramp sized to your own measurements can outperform anything off a shelf. The third reason is simply that building things is satisfying, and a dog ramp is a manageable size for a first serious carpentry project.
This guide walks through what a ramp needs to survive, how to build one, and where DIY plans genuinely fall short. Most of what you'll find online about ramp angles, widths and load limits turns out to be unsourced convention repeated from blog to blog. We checked. This article tells you plainly which numbers are measured and which ones are guesses, so you can decide with your eyes open rather than copying a figure nobody actually tested.
Key Takeaways
- Two independent studies measured real force on a dog's front legs during car jumps and landings: the numbers are higher than most people expect, and cutting the drop height in half did not cut the landing force in half.
- Common DIY figures, ramp angle in degrees, width by dog size, a load-bearing safety margin, are not backed by any published measurement. They are repeated across blogs from a single unsourced origin.
- The four failure points DIY builders miss most often are side rails, ramp slippage at the base, wet-surface grip, and mid-span flex, all mechanical, not anecdotal.
- Verified UK material costs for a basic plywood ramp run roughly £80 to £110 before tools, and that excludes your own time.
- Building is the right call if you already own the tools and enjoy the process or need an odd size to fit; buying makes more sense if you want a tested, ready-to-use surface without guessing at your own numbers.
What a ramp actually has to withstand
A ramp is not a static plank. It has to absorb a moving dog's weight at an angle, repeatedly, which is a different engineering problem from a flat surface holding a stationary load.
Two studies give real numbers here, and they're worth reading closely because they change how you think about ramp height.
Pardey et al., Veterinary Record (2018) measured peak vertical force on dogs' front limbs during jumps out of a car boot, using force plates on 15 dogs. At a 0.55 metre drop, peak force on the front legs reached 27.35 N/kg of body weight. At 0.65 metres it rose to 30.84 N/kg, and at 0.75 metres, 34.12 N/kg. In plain terms: the higher the boot, the harder the front legs land, and the increase is not small between those three heights.
Pogue, Zink and Kieves, Frontiers in Veterinary Science (2022) measured landing force from two obstacle heights, 16 inches and 20 inches, in nine border collies. Landing force reached 266.4% of body weight from the 20 inch height and 260.9% from the 16 inch height. Peak contact pressure was 395.56 kPa versus 390.05 kPa. The difference between the two heights was not statistically significant (p=0.4228 for force, p=0.6227 for pressure).
That last result is the important one. Dropping the obstacle height by 4 inches, roughly a fifth of the starting height, did almost nothing to the force on landing. If you've read anywhere that a lower ramp angle solves the impact problem, this study says otherwise: the force comes from the drop and the dog's own movement, not primarily from how many degrees the ramp is tilted. A gentler slope helps with traction and control on the way up, but it does not substitute for removing the jump entirely. The ramp's job is to eliminate the free-fall landing, not just to make the fall slightly shorter.
This matters for dogs with joint problems specifically. Blue Cross, reviewed by two veterinary surgeons (MRCVS) on 22 September 2023, puts it directly: "You should support them if they need to climb stairs, get on and off the sofa or beds, or into the car – using a ramp where possible can be a big help." The advice is about removing the jump, not softening it.
Building the ramp: materials, cuts, and the numbers nobody has actually measured
Here's the honest part. If you search for how to build a dog ramp, you'll find the same handful of numbers everywhere: an 18 to 25 degree incline, width sized to the dog's breed, a 30% weight capacity buffer over the dog's body weight. These figures appear on ostensibly independent sites, but ramp research and standards review during preparation of this article traced them to unsourced convention, not any dog-specific engineering source or study. Even the widely cited "AKC recommends a 1:4 slope ratio" line doesn't hold up: the American Kennel Club's own ramp advice page discusses ramps in general, encouraging terms, and gives no numeric slope ratio at all.
That doesn't make these numbers wrong. A gentle-looking angle is obviously better than a steep one, and a wider ramp is obviously more stable than a narrow one. But it means you should treat every number below as a starting point to test against your own dog and your own car, not a spec to trust blindly.
Materials
- 18mm structural plywood, sized to your ramp's length and width. This is your ramp surface and needs to resist flex under a moving dog. Thinner ply will bend more than you expect once you're standing partway up it testing weight.
- Softwood framing timber, roughly 45x95mm, for the underside frame that stiffens the plywood and raises the ramp's low end off the ground.
- Anti-slip tape or a textured non-slip coating for the ramp surface. Bare plywood is dangerously slick, especially with any moisture.
- Heavy-duty hinges if you want the ramp to fold for storage or fit in a car boot when not in use.
- Screws and wood glue, exterior-rated if the ramp will live outdoors or in an unheated garage.
- Side rails (more on why these matter below), which can be the same softwood framing timber run along both edges.
Measuring your own angle instead of copying a number
Rather than cutting to a fixed degree figure with no verified source, measure the actual rise you need: the height difference between the ground (or your car's boot floor) and where the ramp needs to land. Then decide the ramp's length based on how gentle a slope your dog will comfortably walk, not run, up. Test with a piece of scrap board or cardboard at a few different lengths before committing to a cut. A longer ramp is always gentler for the same rise; the tradeoff is storage space and portability.
If your dog hesitates, backs away, or scrambles rather than walks steadily, the ramp is too steep for that dog at that length, regardless of what any chart says it should be. This is also the moment to introduce the ramp patiently rather than expect immediate use. Read our 7-day method for introducing a ramp if your dog is nervous about a new surface.
Measuring width
Width recommendations by dog size are another figure that circulates without a clear source behind it. The practical approach: measure your dog's shoulder width and add enough margin that the dog is not concerned about placing a paw off the edge while walking normally, including some allowance for a slight side-to-side wobble at a trot. A visibly nervous, hugging-the-centre gait is a sign the ramp is too narrow for that dog.
Assembly steps
- Cut the plywood to your measured length and chosen width.
- Build the underside frame from the softwood timber, positioned to support the plywood at the edges and at least one point along the middle span, to reduce flex.
- Attach the plywood to the frame with screws and wood glue, glue first for rigidity, screws for holding power while it cures.
- Sand any rough edges, particularly along the sides where a paw might catch.
- Apply the anti-slip surface across the full width and length of the walking surface, not just the centre strip.
- Attach side rails along both edges, raised enough to act as a visual and physical guide, not just a trim strip.
- If building a folding ramp, attach the heavy-duty hinges at the fold point and test the folding action fully loaded before first use.
- Test with your dog at a walk, on leash, before allowing unsupervised use.
Four things DIY builders underestimate
These four issues come up repeatedly in ramp design discussions, and each one has a mechanical explanation rather than being a matter of taste.
Side rails
A flat plank with no raised edge gives a dog nothing to register where the edge is, especially at a trot or when nervous. A dog that drifts sideways near the edge of a rail-less ramp has no warning before a paw goes off the side. Raised side rails, even a modest few centimetres, give a visual and tactile boundary that a flat board doesn't.
Base slippage
A ramp that isn't secured at its base can shift backward under the weight and forward motion of a dog climbing it, particularly on smooth flooring or a car boot lip. This is a stability problem, not a strength problem: the ramp can be perfectly rigid and still slide out from under a dog if the bottom isn't anchored or braced against the surface it rests on.
Wet surface grip
Anti-slip tape and coatings lose effectiveness when wet, and a rained-on ramp left outside is functionally a different surface than the same ramp dry. If the ramp will see any outdoor use, plan for a surface that sheds water or a routine of checking grip before each use in damp conditions, not just a one-time application of tape.
Mid-span flex
A long unsupported span of plywood will flex under a dog's weight, and that flex is what a dog feels as instability underfoot, which is often what makes a hesitant dog stop walking rather than any visible danger. This is why the frame needs a support point along the middle of the span, not just at the two ends. A ramp that looks solid sitting empty can still flex noticeably once a 20kg dog is standing on the middle third of it.
If your dog is older and this is specifically about age-related mobility rather than a general accessibility need, it's worth reading about what to do when a senior dog can't jump into the car anymore, since the underlying problem and the ramp's job are the same regardless of whether you build or buy.
What it actually costs
Material prices below were checked directly against UK supplier product pages on 16 September 2026. Prices change with stock and promotions, so treat these as a snapshot, not a guarantee.
| Material | Specification | Price (GBP) | Source |
|---|---|---|---|
| Structural plywood | 18mm, 1220x2440mm sheet | £37.50 | Wickes |
| Anti-slip tape | 18m x 50mm roll | £17.19 | Screwfix (490JJ) |
| Heavy-duty gate hinges | 2-pack, 183x508x60mm | £19.89 | Screwfix (4508J) |
| Softwood framing timber | C16, 45x95x2400mm | £6.40 (promotional price, normally £7.00) | Wickes |
That totals roughly £81 for one length of framing timber, one sheet of plywood, one roll of tape and one pair of hinges, before screws, glue, sandpaper and any tools you don't already own. Most ramp builds will need more than one length of framing timber for a full frame, so budget closer to £90 to £110 for materials on a typical build.
Beyond materials, factor in your own time: a first-time build with careful measuring, cutting, assembly, sanding and finishing realistically takes an afternoon to a full weekend, longer if you're also building in a fold mechanism. If you don't already own a saw, drill, and clamps, add the cost or hassle of borrowing or buying them, which can easily exceed the material cost on a one-off project.
Building versus buying: an honest comparison
Building makes sense in specific situations, and it's worth being clear about which ones rather than pretending there's one right answer.
Building is the better choice if you already own basic woodworking tools and know how to use them safely, if your car or furniture has an unusual height or shape that off-the-shelf ramps don't fit well, or if the process itself is something you want to do. None of that is a compromise. A well-built DIY ramp, sized correctly and finished with proper grip, can work perfectly well.
Buying makes more sense if you want a ramp that arrives ready to use without a weekend of measuring, cutting and testing angles you can't verify against any published standard. It also makes sense if you don't want to guess at width, surface grip, or edge protection using your own judgement as the only quality check.
PetNestCo's Adjustable Wooden Pet Ramp is a reasonable point of comparison here, not because it solves problems a DIY ramp can't, but because it removes the guesswork this article has just walked through. It comes in two lengths, a 70cm model with two height settings for lower sofas, beds and hatchbacks, and a 100cm model with four height settings for taller SUVs and vans. Both are solid wood with an edge-sealed panel, so there are no rough or splintering edges to sand, and the surface uses a scratch-resistant, non-slip mat rather than tape that needs reapplying. There's no assembly, and the support leg folds flat against the panel for storage, which is a hinge geometry you would otherwise have to work out yourself. If it doesn't work for your setup, the 30-day money-back policy applies with no return shipping cost, and delivery is free within 2 to 7 working days.
To be clear about what that comparison does not include: the product page does not publish a tested weight capacity, so this isn't a claim that it's rated for more weight than a DIY build, only that its adjustability, sealed edges and surface finish address the same failure points discussed above without you having to build and test them yourself.
If you're still deciding between a ramp and steps for getting a dog into a car specifically, the tradeoffs are different again: our comparison of ramps versus steps for a car covers that decision in more detail.
Frequently asked questions
What angle should a DIY dog ramp be?
There is no verified, dog-specific standard angle backed by published research. Common figures circulating online, such as 18 to 25 degrees, trace back to unsourced convention rather than a measured study. The practical approach is to measure the rise you need and choose a ramp length that lets your specific dog walk up steadily without hesitating, scrambling or refusing. Test with scrap material before cutting your final board.
How wide should a dog ramp be?
Width should be based on your dog's shoulder width plus enough margin that the dog doesn't hesitate or hug the centre line while walking normally. Published width-by-breed charts are a manufacturer convention rather than a study-backed figure, so measuring your own dog is more reliable than following a generic size chart.
Does a lower ramp angle reduce impact on my dog's joints?
A gentler slope helps with grip and control while climbing, but it does not meaningfully reduce landing force on its own. Pogue, Zink and Kieves (2022) found that reducing obstacle height by roughly a fifth did not produce a statistically significant drop in landing force. The main benefit of a ramp is removing the free-fall jump entirely, not softening the angle of a smaller one.
Can I use regular plywood without any special coating?
Bare plywood is slippery, especially with any moisture from paws, rain, or humidity, and this is one of the most commonly underestimated risks in DIY ramp builds. Anti-slip tape or a textured non-slip coating across the full walking surface is a practical minimum, not an optional finishing touch.
Is it cheaper to build a dog ramp than to buy one?
Materials for a basic plywood ramp run roughly £80 to £110 in the UK as of September 2026, based on directly checked supplier prices, before tools or your own time. Whether that's cheaper than buying depends on what you already own and how you value the time spent measuring, testing angles, and finishing the surface yourself.
Where this leaves you
A DIY dog ramp is a genuinely reasonable project if you go into it with the right expectations. No chart of angles or widths will tell you what your specific dog and your specific car need, because that chart doesn't exist in verified form. What does exist is a clear picture of what a ramp has to do mechanically: remove the jump, keep a moving dog on the surface, and hold that surface steady in wet and dry conditions alike.
Measure your own rise, test the length against your own dog's walking gait, and build in side rails and mid-span support from the start rather than adding them after something goes wrong. If that sounds like more testing and iteration than you want to take on, an adjustable ramp built to a fixed spec removes that guesswork, and the Adjustable Wooden Pet Ramp is one option worth comparing against your own materials list before you buy the plywood.