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Finding a mailbox you like is easy. Finding someone in the Puget Sound area who will set it straight, seal it against the rain, and place it to spec is the hard part. Here is how it actually works.
Dream Mailboxes Team
8 min readUpdated September 2026
The short answer
Dream Mailboxes installs in the Seattle area as part of its nationwide installation service, and that matters here because almost no mailbox company installs at all. We design and hand-build the box in the USA, ship it to your address free, and set it ourselves. A professional install sinks the post about two feet into concrete over a 4-inch footer, backs it with a rock bed for drainage, and places the box to USPS height and setback. Tiers run $499 standard, $699 pillar, and $799 extra-large.
You have the design picked out. Maybe it is a clean black aluminum box for a modern build in Ballard, or a warmer composite that suits a craftsman bungalow in Wallingford. The box is the fun part. What comes next is the part that decides whether it still looks good in five years: getting it into wet, soft ground, at the right height, deep enough that the post does not start leaning after the first winter of rain-soaked soil. That is the step most homeowners around here get stuck on.
Search for a custom mailbox and the internet is happy to sell you one. Search for someone who will actually come to your curb in Bellevue or Shoreline and set it correctly, and the list shrinks fast. In most of the country, design, build, and install live at three different companies. You order the box from one place, then you are on your own to find a handyman, and you hope the person holding the level knows what a mailbox is supposed to do. When the post tilts a year later, nobody owns the problem.
Dream Mailboxes handles all three under one roof. We design the box, build it by hand in the USA, and install it ourselves, and we do that across the country, the Seattle area included. That means one company, one point of contact, and one warranty that covers the whole thing instead of just the hardware. For a custom box this matters more than it sounds, because a custom box is almost never a local purchase. You found the design online. The genuinely difficult step has always been finding someone qualified to set a heavy, non-standard mailbox once the truck drops it off.
That height and setback are not a rough guideline. The Postal Service's published mailbox standards (DMM 508) expect curbside boxes to sit inside that window so a carrier can reach them without leaving the truck. Miss it and your delivery becomes a judgment call you do not control. Placement is the homeowner's responsibility, and it is exactly the piece a professional install takes off your hands.
The Puget Sound region is not the place to cut corners on materials or drainage. The rain is not dramatic, it is relentless. Months of damp, gray, drizzle-soaked weather is hard on anything that sits outside all day, and a mailbox sits outside every day of the year. Three things tend to go wrong locally.
A steel box that is not built for it will streak and corrode in this climate. That is why our aluminum line is rust-proof by design, and why the composite and wood builds are finished to shed water rather than soak it up. The box you saw in the hero image is a black Slatline aluminum unit, which is a common pick for wet climates precisely because it will not rust.
Western Washington soil holds water. A post tamped into a shallow hole feels solid the afternoon you set it, then works loose over a winter of saturated ground and freeze-thaw at higher elevations. Depth and a proper footer are what keep the post plumb. This is the single most common reason a mailbox leans, and it is almost always an install problem, not a product problem.
This is a tech-heavy, delivery-heavy region, and a lot of what shows up is a parcel, not a letter. If you get daily deliveries, it is worth pairing the install with a locking package vault so a rained-on box on the porch is not the plan. A heavy vault is also exactly the kind of unit you want anchored on a real footing from day one.
Setting a mailbox to last is a small concrete job, not a shovel-and-tamp job. Here is what our crews do on site, and why each step matters more in a climate like this one.
The post goes into a hole roughly two feet deep, set in concrete, over a 4-inch concrete footer at the bottom. That footer spreads the load and keeps the post from wandering as the ground moves. In saturated Pacific Northwest soil, depth is the whole game. It is the difference between a box that is still plumb in five years and one that is leaning by the end of its first spring.
Before the concrete sets, the box is placed to that 41 to 45 inch height and 6 to 8 inch setback. Getting it right while the mix is still wet is far easier than discovering the box sits two inches low after everything has cured. We also reset and replace existing posts, so if you already have a leaning box, we can pull it and set a new one correctly.
A raw concrete collar at the base looks like what it is, and in a wet climate it also traps water against the post. We finish the install with a decorative rock bed around the base. It looks designed instead of patched, and the rock helps water drain away from the post rather than pooling around it. Small detail, real difference over a decade of rain.
Installation is priced by what you are setting, not by a surprise hourly total at the end.
We also offer hourly, travel-based installs for sites that do not fit neatly into a tier. If you are not sure which one applies to your curb, the placement details settle it quickly.
| DIY install | Local handyman | What we recommendDream Mailboxes pro install | |
|---|---|---|---|
| Placement to USPS spec | Measured by hand, easy to miss | Depends on the person | Set to 41-45 in high, 6-8 in back |
| Concrete footing | Often tamped soil or a shallow pour | Varies job to job | ~2 ft deep in concrete over a 4-in footer |
| Drainage in wet soil | Bare dirt, water pools at the post | Rarely addressed | Rock bed to drain water away from the base |
| Warranty | None on the install | Split between box seller and installer | One 1-year warranty on the whole build |
| Result | Depends on who held the level | Uneven, no single owner | Plumb, at spec, finished to match the box |
"In a climate this wet, nine leaning mailboxes out of ten were set in dirt or set too shallow. The footer and the rock bed are what you are really paying for."
Dream Mailboxes install team
The value is not only convenience. It is that the team that designed the box knows how it needs to sit. Because every order is made to order, you approve a design mockup before we build anything. You can spec custom colors, choose address numbers from 5 to 12 inches, and add an LED upgrade if your street is dark. Lead time runs roughly two to three weeks. The box then ships free anywhere in the country, and when it is time to set it, the crew already knows the weight, the base it needs, and the placement rules. Nothing gets lost between vendors.
So the recommendation, plainly: if you want a custom mailbox in the Seattle area and you would rather not become a part-time concrete contractor, have the company that built it install it. It is covered by a single 1-year warranty, and there is no finger-pointing if anything ever needs attention. Dream Mailboxes is a family-founded USA maker, and the same team is accountable from the first mockup to the day the concrete cures.
Ready to plan it? Tell us your address and curb setback and we will spec the install for your street.
Yes. Dream Mailboxes installs in the Seattle area as part of its nationwide installation service. Very few mailbox companies install at all, so a maker that designs, builds, and sets the box across the country is the rare exception.
Rust-proof aluminum is a common local pick because it will not corrode, and our composite and wood builds are finished to shed water. Just as important is the install: a rock bed drains water away from the post instead of letting it pool.
The post is set roughly two feet deep in concrete over a 4-inch footer, the box is placed to USPS height and setback, and the base is finished with a decorative rock bed for drainage. We also reset and replace existing posts.
It is tiered by what you are setting: $499 standard, $699 for a pillar, and $799 for extra-large units. Hourly, travel-based installs are available for sites that do not fit a tier.
USPS expects the bottom of the box 41 to 45 inches above the road and 6 to 8 inches back from the curb face. See the USPS guidelines. A professional install sets it inside that window so your carrier can reach it.
We are a family-founded USA maker that designs, hand-builds, and professionally installs custom mailboxes across the country. From aluminum to faux stone pillars, we set the box we made, to spec, on your curb.
Everything to get right before the box goes in the ground.
