5 DIY Kitchen Remodel Mistakes That Cost Saint Louis Homeowners Thousands

Every month a Saint Louis homeowner calls us halfway through their DIY kitchen remodel asking for help. Usually we can save the project. Sometimes we cannot. After 400+ kitchen deliveries and hundreds of conversations with DIY remodelers across Saint Charles, O'Fallon, Wildwood, and the rest of the metro, here are the five mistakes that cost real money.

None of them are about picking the wrong paint color. These are the structural, order-of-operations mistakes that turn a $25,000 remodel into a $38,000 remodel.

1. Ordering cabinets before finalizing appliance dimensions

This is the single most common and most expensive mistake we see.

Homeowners fall in love with a fridge, a slide-in range, or a dual-zone wine column, decide they want it, then order cabinets sized for "a standard fridge" or "a 30-inch range." The appliance arrives. It is 36 inches wide, or it is taller than 72 inches, or it needs 1 inch of ventilation clearance on each side.

Now your cabinets are wrong. Either you return a cabinet run (delivery fee, restocking fee, 2-week delay), or you settle for an appliance that does not fit the look you wanted.

How to avoid it

Before you order cabinets, buy the appliances (or at minimum, get the exact spec sheets for the models you plan to buy). Write down:

• Refrigerator: width, depth (including door swing), height, clearance required above/sides
• Range: width, height from the floor, whether it is a slide-in (needs 0 counter overhang) or a freestanding (needs trim pieces)
• Dishwasher: standard 24 inch or larger panel-ready
• Wall oven / cooktop: cutout dimensions, electrical vs gas

Share this with your cabinet dealer before you finalize the order. We catch this problem weekly. Ten minutes of spec sheet review saves $2,500 on average.

2. Demoing before the cabinets arrive

This one hurts because it always feels like progress. You take the weekend, rip out the old cabinets, haul them to the dumpster, and feel great about the $1,200 you saved on demo labor.

Then life happens:

• Delivery delayed by 4 days
• Cabinet shipment shorted by one specialty unit you need to restock
• Your plumber says the drain line under the sink needs to be rerouted
• The dishwasher supply line you assumed was fine needs to be replaced

You are now eating takeout from paper plates for three weeks instead of one. Your kids are using the guest bath sink to brush their teeth.

How to avoid it

Do not demo your old kitchen until your new cabinets are in the driveway. Schedule demo for the morning of delivery. The "old kitchen" is useful right up until the new one lands. Once it is delivered, you have a hard deadline to finish.

3. Skipping the plumber walk-through

Kitchens built in the 1970s, 80s, and early 90s across Saint Charles, Saint Peters, and inner-ring Saint Louis suburbs almost always have one plumbing surprise:

• Galvanized supply lines that need replacing when the disposal moves
• S-traps under the sink (no longer to code)
• No GFCI outlet under the sink
• No shutoff valve on the dishwasher supply
• A dishwasher drain that goes straight into the disposal without an air gap (required in some municipalities)

Homeowners find this out after the cabinets are installed. Now the plumber has to work around brand-new $8,000 cabinets, which doubles the labor cost and risks damage.

How to avoid it

Have a plumber walk your existing kitchen before demo. Spend $75 on an inspection. They will tell you what needs to change, you can budget for it, and the work happens before new cabinets are in the way.

4. Not measuring for crown molding, light rail, and fillers

Cabinets do not magically hit every corner and ceiling. You need:

• Fillers (blank vertical panels) where cabinets meet walls that are not perfectly plumb
• Crown molding at the top of uppers if they do not go to the ceiling
• Light rail (under-cabinet trim) if you want to hide under-cabinet LED lighting
• Toe kick across the base that hides the plywood toe kick board
• Scribe molding for the side of any cabinet that butts against a wall

DIY homeowners routinely order the box cabinets and forget all five of these accessory pieces. They arrive, install, and realize the kitchen looks unfinished. Now they are back online ordering accessories, waiting another 1-2 weeks, stopping the project.

How to avoid it

Ask your dealer for a "complete kitchen" checklist. A dealer that knows what they are doing will include all trim pieces in the quote. Ours does. Look for these specific line items:

• Toe kick (1 piece per 8 linear feet of bases)
• Crown molding (1 piece per 8 LF of uppers that do not go to ceiling)
• Light rail (same)
• Fillers (count the walls your cabinets touch, you need one per wall intersection)
• Scribe molding (one per exposed cabinet end)

5. Underestimating the electrical work

Modern kitchens need more power than 1985 kitchens. What adds circuits:

• An island needs its own dedicated 20-amp circuit if it has outlets (code requirement)
• A kitchen with a microwave built into an upper cabinet needs a dedicated circuit for it
• Under-cabinet LED lighting usually needs a switched circuit
• A range hood that vents outside needs a dedicated circuit if it is more than 300 CFM
• Any appliance upgrade from gas to induction needs a 240V circuit and usually a panel upgrade

A Saint Louis licensed electrician runs $85-$135 per hour. A full kitchen electrical refresh on an older home is typically 8-16 hours of work. That is $1,000-$2,000 the homeowner did not budget for because they did not know they needed a new circuit.

How to avoid it

Book a licensed electrician for a one-hour walkthrough before you demo. They will tell you what circuits you need, where your panel needs more space, and whether an upgrade is required. Same rule as the plumber. $100 in up-front inspection saves $2,000 in scrambling.

Bonus: the order-of-operations cheat sheet

Here is the order we recommend for every Saint Louis DIY kitchen remodel:

1. Measure the space (we have a measuring guide on our site)
2. Pick appliances (or at minimum get the spec sheets)
3. Get a cabinet quote that includes all trim pieces
4. Plumber walkthrough ($75-$100)
5. Electrician walkthrough ($100-$150)
6. Order cabinets (2-4 week lead time)
7. Book installer, plumber, electrician, painter, flooring crew (schedule them)
8. Demo the morning the cabinets are delivered
9. Electrical rough-in (with cabinets in the garage as reference)
10. Plumbing rough-in
11. Cabinet install
12. Countertop template (24-48 hours after cabinets)
13. Paint and drywall touch-ups
14. Flooring (if LVP or click-lock, after cabinets; if tile, before)
15. Backsplash
16. Countertop install (7-10 days after template)
17. Sink and appliance install
18. Punch list

Follow this order and you save yourself the two most expensive DIY kitchen problems: idle waiting and rework.

How we help DIY remodelers

Saint Louis homeowners have been showing up in our Saint Charles showroom for years to build their own kitchens. We help by:

• Quoting a complete cabinet package including every trim piece you will need
• Verifying your appliance cutouts match your cabinet cutouts before the order ships
• Including all hardware (soft-close hinges, drawer slides) standard
• Hand-delivering to your driveway so you do not need to rent a truck
• Passing through our MSI Surfaces dealer pricing on counters and flooring when you buy the kitchen with us

Our cabinet customers are split roughly 60% homeowner-DIY, 30% homeowner-hiring-contractor, 10% contractors doing their own projects. We see all three paths succeed. The ones that fail almost always fail on one of the five mistakes above.

Ready to plan it right

Start your free quote →. We send a full line-by-line quote within 24 hours, including every trim piece and accessory you will need.

Or come see us at 1618 Country Club Plaza Drive in Saint Charles, or call (314) 441-5620 and we will talk through your project.

Frequently asked

Q: Can you recommend plumbers and electricians in Saint Louis? Yes. We keep a list of tradespeople our customers have been happy with across Saint Charles, O'Fallon, Chesterfield, and the metro. Call us and we will share the names.

Q: How much should I budget for "surprise" costs? 10% of your total project budget is a safe number for a home in good condition. 15-20% for homes built before 1970.

Q: What if I want to DIY everything including install? Totally doable. Our cabinets ship preassembled so there is no assembly step. You just need a helper for lifting uppers, a level, a drill, and a stud finder. Budget a weekend for a standard 10-15 cabinet kitchen.

Q: Do you deliver outside Saint Louis? We hand deliver within roughly 50 miles of Saint Charles. Anywhere else in the continental US ships via freight. See our shipping policy.

Q: What if I screw something up mid-install? Call us. If we sold you the cabinet, we will help troubleshoot. If you need a replacement part we usually ship within 5-7 business days.