Hiring a contractor to pour a patio runs $8 to $15 per square foot, which turns a modest 12-by-12 slab into a $1,500 to $2,000 bill. Pour it yourself and that same patio drops to $4 to $6 per square foot, mostly the cost of bagged concrete and a few rentals. A cheap DIY concrete patio is one of the highest-payoff weekend projects a homeowner can take on, and with careful forming and finishing the result looks every bit as good as a pro pour. This guide walks the whole job, from layout to the final broom finish.
Part of our Decks & Outdoor guide — explore the full guide →
What It Costs to DIY
For a 12-by-12-foot patio (144 square feet) poured 4 inches thick, you need roughly 1.8 cubic yards of concrete. Mixing 80-pound bags yourself, that is about 90 bags at $5 each, or around $450. Add gravel base, 2×4 form lumber, rebar or wire mesh, stakes, and tool rentals, and the full materials list lands near $700 to $900. Renting a gas-powered mixer for $60 a day saves your back and is worth every penny. The same slab from a contractor would cost $1,200 to $2,200, so you keep $500 to $1,300 in your pocket.
For slabs larger than about 200 square feet, ordering ready-mix from a truck (roughly $150 to $200 per cubic yard with a small-load fee) becomes cheaper and far easier than mixing dozens of bags by hand.
Tools and Materials You Need
- Concrete mix (80-lb bags) or ready-mix delivery
- Gravel (crushed stone) for a 4-inch compacted base
- 2×4 lumber, stakes, and 3-inch screws for forms
- Rebar (#3) on a grid or 6-inch welded wire mesh for reinforcement
- A screed board, bull float, edger, groover, and steel or magnesium trowel
- A wheelbarrow, mixer, shovel, and a stiff push broom for the finish
Prepare the Base
Mark your patio with stakes and string, then dig out 7 to 8 inches of soil so you have room for gravel and a 4-inch slab. Slope the excavation about 1/4 inch per foot away from your house so rain drains off, not toward the foundation. Spread and compact 4 inches of crushed gravel with a hand tamper or rented plate compactor; a solid, level base is what keeps the slab from cracking and settling. Skipping compaction is the number-one cause of failed DIY patios.
Build and Brace the Forms
Set 2×4 forms on edge around the perimeter, screwed to stakes driven every 2 to 3 feet. Check the top edges with a level (carrying your drainage slope across), because the wet concrete will follow exactly what you build. Brace the forms well, since fresh concrete is heavy and will bow weak boards outward. Lay rebar or wire mesh on small chairs so the steel sits in the middle of the slab thickness, where it does the most good.
Mix, Pour, and Screed
Mix concrete to a thick oatmeal consistency, not soupy, since too much water weakens the cured slab. Work in sections, starting at the far corner and pulling concrete into the forms with a shovel or rake. Once a section is full, drag a straight 2×4 screed board across the form tops in a sawing motion to level it. Move fast: depending on temperature you have only 30 to 60 minutes of working time before the mix stiffens. Keep a helper mixing while you place and screed.
Float, Edge, and Finish
After screeding, run a bull float over the surface to push down aggregate and bring up the “cream.” Wait for the bleed water to evaporate, then round the perimeter with an edger and cut control joints every 4 to 6 feet with a groover to direct future cracking. For the final texture, drag a stiff push broom across the slab to create a slip-resistant broom finish, the easiest attractive finish for a beginner.
Ways to Dress It Up Cheaply
A plain gray slab does not have to look plain. While the concrete is still wet, you can press a stamping mat into the surface to mimic flagstone or brick for the cost of a rented stamp. Adding a powdered or liquid color hardener tints the slab earthy tan, slate, or terracotta for a few dollars per bag. After curing, a concrete acid stain ($30 to $50 a gallon) produces rich, mottled, stone-like color, and a sealer adds sheen and protects against stains. These finishes turn a $5-per-square-foot DIY pour into something that reads like a $15 designer patio.
Avoiding Common Mistakes
Most failed DIY patios trace back to a handful of errors. Pouring on an un-compacted base lets the slab settle and crack, so always tamp the gravel. Adding too much water to the mix for easier spreading weakens the cured concrete dramatically, keep it stiff. Skipping control joints guarantees random cracking, so groove them every 4 to 6 feet. Working too slowly in hot, dry weather lets the surface set before you finish; pour early in the day, keep a helper mixing, and mist the slab if it skins over too fast. Finally, never finish concrete while bleed water still sits on top, or you will trap it and create a weak, flaky surface.
Cure It Right
Concrete gains strength slowly. Keep the slab damp by misting and covering it with plastic sheeting for at least 3 to 7 days; curing too fast in the sun causes surface cracking. Wait 24 to 48 hours before walking on it and a full week before setting heavy furniture. Concrete reaches roughly 70 percent of its strength in the first week and keeps hardening for about 28 days, so be patient with heavy loads. Done right, your cheap DIY concrete patio will serve for decades and look like it cost twice what you spent.
Once it has fully cured, brush or roll on a quality concrete sealer to lock out water, oil, and stains and to keep the surface from spalling through freeze-thaw winters. Reapply the sealer every two to three years, and the slab will stay clean and crack-resistant far longer. For the cost of materials and a couple of weekends of labor, you end up with a durable outdoor living space that adds real usable square footage and resale appeal to your home.
