Concrete patio construction in Renton WA - a slab that drains away from your house
Water sitting against the house, or an old slab that's cracked and sunk? We build patios on a packed base, sloped so rain runs off.
- Licensed and insured.
- Free in-person estimates.
- We respond within 1 business day.
What goes into building a concrete patio in Renton?
Concrete patio construction in Renton means digging out the area, building a firm base and pouring a slab sloped away from your house, then finishing and curing it so you get a solid, dry place to sit outside.
Most calls start with a back door that opens onto mud, or an old slab that's cracked, sunk or sending water toward the house. The price moves with the patio's size, how much digging and base work the ground needs, how we reach your backyard, whether a drain belongs in the plan and the finish you pick, from a plain broom texture to stamped concrete. The schedule turns mostly on the prep, the weather on pour day and the curing wait before you can use the patio, and on the city too if a permit applies, so I put all of that in a written estimate once I've seen your yard.
How do you know it's time for a new patio?
Water pooling by the house
If rain collects on the patio or runs toward your siding, the slab usually tips the wrong way or has settled near the wall. The longer it goes on, the longer water sits against your foundation every time it rains.
A slab that has sunk
One section lower than the next, or a lip at the door, usually means the base under it was raked flat and never packed, so it settled with the dirt. Waiting tends to widen the gaps and leaves an edge someone will trip on.
Bare ground by the door
A worn patch of lawn or mud where everyone steps out tells you the yard is already being used like a patio. Each wet season makes it softer and messier, and the mud ends up inside.
What our concrete patio construction includes
We start at the estimate by looking at downspouts and wet spots, so a drain can go into the plan from the beginning instead of being added later. On the job we dig down to firm subgrade, the ground the slab sits on, and pack a base over it in layers, because a base that's only raked level settles along with the dirt. We set the forms so the patio slopes away from your house, pour early rather than in midday heat that can leave a weak, dusty top, and give it a broom finish, a light texture that gives you grip when it's wet. Then we cut control joints, shallow grooves that tell the slab where to crack, and let it cure, which means keeping it protected while it gains strength before you put furniture on it. A narrow side gate or a set of stairs changes how we bring material in, and I'll tell you that up front. If the ground itself looks doubtful, one concrete supplier's guidelines say to bring in a geotechnical engineer, and I'd tell you so rather than guess. When a budget needs trimming, I'd suggest giving up some finish before any base work, since nobody sees the base on day one but it's what keeps the patio flat.
Patios rarely stand alone. If you'd like pattern or color, our stamped concrete services go on the same kind of base, and if the patio needs a path to the driveway or gate, we can do the concrete sidewalk building in the same plan so the slopes and joints line up.
Plain broom-finished patio
This suits most households that want a sturdy, slip-resistant spot for a table and a grill. It puts more of the budget into the base, which is where I'd rather it go.
Stamped or colored finish
This suits homeowners who want the look of stone or tile on a patio that's in full view of the house. It costs more than a plain finish, so it makes the most sense once the base is planned properly.
Replacing a failed slab
This suits a yard with an old patio that has sunk, cracked through or tipped toward the house. We break it out and haul it away, then rebuild the base instead of pouring over the problem.
Patio with a walk or drain
This suits a yard with wet spots, downspouts close by or no clear path to the patio. Planning the drain or the walk along with the slab saves cutting into new concrete later.
Get a written patio estimate for your yard
We reply within one business day. I'll come out for a free, obligation-free estimate, walk the yard with you and put the scope in writing so you can compare it with any other quote.
(425) 264-4089- Based in
- Renton, WA 98057
- Hours
- Mon–Sun: 7 AM–11 PM
What happens after you call about a patio in Renton?
Here's how a patio job runs on your side, from the first call to the day we walk the finished slab together.
Call and set a visit
Call (425) 264-4089 or send the form, and I'll set a time to come out. It helps to mention if we'll reach the backyard through a narrow gate or down stairs.
Walk the yard together
I look at the site, take measurements and ask how you plan to use the space. A dining table and a grill corner want different sizes and shapes, so this shapes the plan.
Review your written estimate
You get a written estimate that explains the prep, the concrete work and anything we'll ask of you before pour day, so you can see what each part of the price pays for. We also go over what the city or county may want to see.
Pour, finish and walk through
On the job we keep the area neat and cover what needs covering, such as nearby siding and plantings. Before we pack up, we walk the finished patio with you.
Why Renton homeowners call Form & Pour Renton Concrete Company for patios
I come out to every estimate
I measure your yard and answer your questions myself, then a small crew I work with does the work while I check in as it goes. The person who planned your slope and base is the one keeping an eye on it.
Pouring concrete since 2017
I started out pouring walkways and fixing steps for neighbors on weekends, learned beside experienced finishers and made it a full business in 2017. Most of our calls still come from Renton and the cities around it, which is why careful prep and a tidy site matter so much to us.
Licensed and insured for your job
We're licensed and insured. That's the first thing worth confirming on any contractor you're considering, and the questions below explain how to look one up with the state.
On a patio, what matters most is the base and the slope you won't see once it's poured, so I'd like to see your yard before we talk numbers. Call (425) 264-4089 or request an estimate.
Concrete patios and site work in Renton
In Renton, City of Renton Permit Services issues a Civil Construction Permit for site work that adds or replaces more than 500 square feet of hard surface, involves more than 50 cubic yards of grading, or clears or disturbs more than 500 square feet. A large patio, or a patio poured along with a new walk, can pass those lines. For a smaller patio, those rules don't settle the question either way, so I'd suggest asking the city's permit staff at PermitTech@rentonwa.gov. At the estimate we go over whether your project may need a permit, check which city or county office covers your address, and can handle the application or help you with yours.
Much of what we see on patio jobs around Renton comes down to getting in and getting water out, with backyards reached only through a side gate or down a run of steps, sloped lots that need a level pad and older slabs that have tipped toward the house. We plan the material around the way in and set the slope before anything else, and we see the same kinds of yards on jobs in Kent and Bellevue.
Questions about concrete patios in Renton
How much does a concrete patio cost in Renton?
The price comes down to the patio's size, how much digging and base work the ground needs, how we get into your backyard and the finish you choose. One Seattle-area patio guide notes that an open, flat yard lets a crew use small machinery, while a narrow side gate or stairs means much of the work goes by wheelbarrow and by hand, which adds labor hours and cost. I measure all of that on site and put each part in writing, so you see your own figure.
Does my patio need a drain?
It may, if the spot tends to collect water or sits near downspouts. A Seattle-area patio guide says a contractor may recommend a channel drain, a narrow grate set into the concrete, or a French drain, a gravel trench with a pipe, in those places, and suggests asking for drain options in each estimate you get. Where the ground stays dry, the slope of the slab usually does the job.
Why does my new concrete patio have small cracks?
Some cracking is normal, and the American Concrete Institute's national slab guide says owners can expect some on every project without it necessarily meaning poor design or construction. The control joints we cut are there to give those cracks a planned place to form. A crack that keeps widening or lets one side drop is a different matter and worth a call.
What causes a concrete patio surface to flake?
Flaking, called scaling, is the top layer of the slab breaking down, and general guidance from a state transportation department outside Washington ties it to over-finishing, water added during finishing, skipped curing or freezing before the concrete gains strength. The same guidance points to a mix without enough air entrainment, tiny air bubbles that give freezing water room, for the climate. Before you hire anyone, ask how they'll finish, cure and protect the slab from freezing, and whether the mix suits local weather.
Do I need a permit for a retaining wall next to my patio in Renton?
In Renton, a retaining wall 4 feet or taller needs a building permit, unless there is a slope above the wall, and the city measures height from the bottom of the footing to the top of the wall. That matters on sloped yards, where leveling a patio often means holding back a bank. If your wall is near that height or has a slope above it, I'd suggest checking with the city early, and we'll go over it at the estimate.
How do I check a Washington contractor before hiring?
Look the business up with the Washington State Department of Labor & Industries, which lists every contractor in its Verify a Contractor tool once it registers. State law requires all construction contractors to register with L&I and to be bonded and insured to protect the public. Under L&I rules, eligible customers can also apply for recovery payments if they lose money because of contractor work.
Related services that pair with a new patio
If you'd like your patio to look like stone or brick, stamped concrete presses pattern and color into the slab while it's still workable, on the same base.
A new patio is easier to enjoy when a walk leads to it from the driveway, gate or back door instead of a worn path across the lawn.
Service areas we cover from Renton
Form & Pour Renton Concrete Company is based in Renton, WA, and builds patios in the cities around it, including Kent and Bellevue. Each of the 12 cities below has its own page, and if you're not sure whether we come out your way, please just ask.
Renton, WA
Book your concrete patio estimate today
Send a few photos of the yard with your message, and mention the gate or stairs on the way in and any wet spots or downspouts, so I arrive knowing what to look at.