$4,000 Back for a Soggy Yard? Talk to a Landscape Architect Before Anyone Digs
Revised October 21, 2026
Is a landscape architect worth it?
Often, yes, when your yard has slope, standing water, walls or a big hardscape budget. Missouri lets only licensed professionals call themselves landscape architects, and their work covers grading and drainage plans, not just plants. For a simple planting bed, a garden center or landscape contractor can legally draw the plan.
Keep reading ↓The low corner of the yard in Pagedale is a brown pond again, and that water could be worth up to $4,000 back from MSD, if nobody touches a shovel too soon. You heard it start after dark: the downspout choking, then a steady gurgle at the corner of the house. By morning, mulch has floated up against the fence like driftwood, the grass squelches under your slippers, and the basement has that faint wet-cardboard smell again.
So the questions pile up. Do you need a landscape architect, a designer, or just a crew with a skid steer? What does any of it cost? Here’s the turn: in St. Louis, the most expensive mistake has nothing to do with who you hire. It’s letting anyone start digging too soon.
Is a landscape architect worth it?
Often, yes, when the yard has slope, standing water, walls to hold back or a big hardscape budget, because that’s the work the license covers. Under Missouri law, professional landscape architecture includes site plans, landscape grading and landscape drainage plans, irrigation plans, planting plans and construction details. You can see the difference from the back step after a storm: water sheeting across a patio toward the door, or water sliding into a planted swale and disappearing. A plan drawn by someone trained in grading costs less than ripping out a patio that was poured the wrong way.
Missouri also guards the title. No one may hold themselves out as a professional landscape architect in this state unless they’re licensed, yet the same law lets people in nursery occupations, gardeners and landscape contractors prepare planting plans, as long as the project doesn’t put public health, safety and welfare at risk. Translation: the garden center can sketch your new beds. For grading that decides where a storm goes, hire someone licensed.
Before anyone digs: MSD’s rainscaping money
Here’s the St. Louis piece to know before you sign anything. The Metropolitan St. Louis Sewer District runs a Rainscaping Small Grants Program that reimburses homeowners after they add rainscaping to better manage stormwater runoff, and residential projects can request up to $4,000. A rain garden that gives runoff a safe place to go, away from your foundation, is the kind of fix it was built for.
A local TV news report told the story of a homeowner near Tower Grove Park whose small backyard had patches of grass and steep brick slopes that sent rainwater straight into the alley. A landscaper added permeable pavers and native plants with deep roots, and MSD reimbursed her family several thousand dollars.
Now the line worth taping to the fridge. MSD’s program page puts it bluntly: do NOT begin installation until your application is approved and you have received a Notice to Proceed. Applications go by mail or hand delivery, because electronic applications are not accepted. MSD recommends applying by January for a spring installation and by June for a fall one, and the Rainscaping Team takes questions at (314) 577-0202. Money depends on your program area, and some areas fill up and waitlist new applications, so check your address on the program’s eligibility map first.
What does hiring a landscape architect cost in St. Louis?
There’s no posted price list, and anyone who names a firm number before walking your yard is guessing. Landscape architects generally charge one of three ways: by the hour, as a flat design fee, or as a percentage of construction cost. An hourly consultation and a full master plan for a steep, wooded lot sit at very different price points, and the scope of your yard moves the number far more than your zip code does.
For a floor under any quote, look at what the profession earns here. O*NET’s local wage data puts the median landscape architect in the St. Louis, MO-IL area at $31.77 an hour, with the 90th percentile at $47.91. That’s the paycheck, not the bill. A firm’s billed hour also has to carry insurance, licensing, software and the evening spent redrawing your patio, so expect the invoice rate to sit above the wage, and ask what each billed hour includes.
What pushes the price up or down
Lot size and slope matter most, because a flat yard is far simpler to plan than a hillside that sheds water toward the house. Complexity adds design time too: drainage fixes, retaining walls, outdoor kitchens, lighting and irrigation each need their own details. So does the level of drawing you want. A rough concept sketch costs much less than a full set of construction documents a contractor can build straight from.
Hourly, flat fee or percentage
Each model fits a different job. Hourly billing suits a consultation or one defined question, like where to put a rain garden. A flat design fee suits a clearly scoped project, since you know the cost before the work starts. A percentage of construction cost shows up on big, involved builds, where the design effort scales with the budget. Whatever the model, get the fee, the scope and the number of revision rounds in writing.
What the fee actually pays for
You’re paying for thinking, not just drawings: measuring and mapping the yard, reading how water moves across it, solving grade problems, and producing a plan detailed enough to price and build. Good documents also let several contractors bid the exact same scope, so you compare apples to apples instead of three guesses scribbled on the back of a business card.
Does the design fee count toward the build?
Sometimes, but don’t assume it. Some design-build firms credit part of the design fee if you hire them for the installation. Independent landscape architects who only design usually bill separately, which keeps their advice free of any pull toward a bigger build. Ask early, so the total holds no surprises at signing.
Architect, landscape architect or designer: who does what here
An architect designs buildings. A landscape architect designs the land around them, and Missouri’s definition draws the line clearly: the practice of professional landscape architecture does not include the design of structures or facilities ordinarily included in the practice of engineering or architecture. A designer, a nursery or a landscape contractor can prepare planting plans, but can’t call themselves a landscape architect without the license.
All of those licenses sit under one roof: the Missouri Board for Architects, Professional Engineers, Professional Land Surveyors, Professional Landscape Architects, and Licensed Interior Designers. Before you sign, run the name through the state’s Professional Registration licensee search. It takes a minute at the kitchen table, and it’s the cheapest insurance in the whole project.
Check the map before the shovel. Look up your address on MSD’s rainscaping eligibility map, then compare local crews in our roundup of top landscaping services in St. Louis.
If you’re the landscape architect, the designer or the install crew a soggy-yard homeowner calls next, those homeowners are your next customers, so see who AI names instead of you.
St. Louis clay doesn’t forgive a bad plan
Clay is the quiet reason so many local yard projects go sideways. It’s the slick gray stuff that clings to your boots; dig a hole in July and the walls come out smooth as pottery, dig the same hole in April and it holds water like a bowl. Much of the soil in St. Louis is high in clay, the Missouri Botanical Garden notes, and clay tends to compact into a hard, dense layer that keeps water, air and fertilizers from moving downward, which is why a rain garden or a new bed here needs a plan for where the water goes, not just a pretty plant list.
That’s also why the heaviest storms do so much damage on a badly graded lot. Water that can’t sink in has to go somewhere, and without a plan it finds the lowest point, which is too often your foundation or the neighbor’s side yard. A landscape architect’s grading and drainage plan is, at bottom, a decision about where every heavy rain will end up.
What should you expect during the design process?
Expect phases, not one visit. Most landscape architects move from a consultation to a concept or master plan, then to detailed construction documents, and each phase ends with something you review and approve before the next begins. That rhythm protects your budget, because you never commit to the whole project on the strength of one hopeful conversation in the yard.
The first walk-through
It starts on your property, ideally after a rain. The architect walks the yard, watches where water collects, asks how you actually use the space, and takes rough measurements and photos. Talk budget honestly here. A good professional is listening for the real problem, which often isn’t the one you called about.
Concept, master plan and the MSD packet
Next comes the plan on paper: a scaled drawing of the whole property with patios, plantings, paths and drainage laid out. If you’re applying to MSD, its application resources include a sample landscaping plan and blank grid paper for your own drawing, so ask your designer for a version you can submit. Expect a round or two of revisions; this is the document you’ll live with for years.
Construction documents and bidding
For anything built, the last phase turns the plan into instructions: materials, dimensions, grades and details a contractor needs to price and build accurately. With them, several contractors can bid the same scope. Some landscape architects will also review bids and check the work as it goes in, usually for an added fee.
The dig itself has a clock too. Missouri law says whoever excavates must notify the notification center at least two working days, but not more than ten working days, before the digging starts, so the buried lines get marked. A careful landscape architect builds both clocks into the schedule. A rushed crew skips them.
When a designer is the smarter call
Hire a designer, or a strong install crew, when the job is mostly plants and looks on flat, well-draining ground: fresh beds, a new plant palette, a front yard that finally matches the house. Save the licensed architect for grading, drainage, retaining walls and anything structural, where one wrong elevation turns into a muddy, expensive redo. A modest patio on level ground may not need one at all; the same patio on a steep Roxana lot probably does.
Pavers, plants and a rain barrel add up fast. Here’s where St. Louis bargain hunters stretch the rest of the budget.
How do you choose the right landscape architect in St. Louis?
Choose on license, portfolio and how well they listen, not on price alone. Ask to see projects a few years old, since a landscape only proves itself once it has grown in and weathered a couple of hard summers. Ask who does the installation, because some firms design only and hand off to contractors while others run the whole build. Then get the scope, the fee and the schedule in writing, including who files the utility-locate request before anyone digs.
If you’re still deciding whether to hire out at all, or the yard is one piece of a bigger plan, these guides pick up where this one stops:
- DIY lawn care versus hiring a pro in St. Louis
- What it costs to build a garage in St. Louis
- Trusted sprinkler repair near you
Frequently asked questions
What does a landscape architect charge per hour?
There’s no standard billed rate, so get it in writing before the first visit. For context, the median landscape architect in the St. Louis, MO-IL area earns $31.77 an hour in wages, and a firm’s billed hour sits on top of that. Bigger projects often move to a flat design fee or a percentage of construction cost. Ask whether the first site visit is billed.
Is $100 an hour too much for landscape work?
It depends on what the hour buys. For licensed design time, where someone is solving the grading and drainage that decide where a storm goes, a professional rate can pay for itself by preventing a single tear-out. For mowing or planting labor, the same rate would be steep. Judge it against the skill the task needs and the cost of getting it wrong.
What’s the difference between an architect and a landscape architect?
An architect designs buildings; a landscape architect designs the land around them. Missouri’s definition of professional landscape architecture covers site plans, grading, drainage, irrigation and planting plans, and it leaves out the design of structures ordinarily included in engineering or architecture. Architects and landscape architects fall under the same Missouri licensing board.
Do I need a landscape designer or architect?
Choose by the problem. Missouri law lets gardeners, nursery staff and landscape contractors prepare planting plans, so new beds and curb appeal on flat ground rarely need more. When water, slope, retaining walls or a big patio are in play, a licensed landscape architect’s grading and drainage plan is the safer place to spend.
What should I ask a landscape architect before hiring?
Ask whether they hold a Missouri license, then check it on the state’s licensee search. Ask how they charge, what’s included and how many revision rounds come with the fee. Ask who installs and who requests the utility locates. And if water is the problem, ask whether they’ve designed rainscaping for an MSD grant before.
What are the common landscape design mistakes?
Ignoring where the water goes until it pools against the foundation. Planting for how things look today, not how big they’ll grow. Building in disconnected weekend pieces with no master plan. Fighting St. Louis clay instead of planning around it. And, in MSD territory, starting installation before the grant approval and Notice to Proceed arrive.
Written by a dedicated team of St. Louis locals who live, work, and play right here in the St. Louis metro. Founder Lane Forman and team are committed to building the region’s most trusted directory by verifying listings and connecting local businesses with loyal customers across Missouri and Illinois.