5/5 — 6 verified reviews

Optima 12 x 12 storage shed

  • 117 sq ft interior
  • 13′ × 11′ footprint
  • 7′3⅝″ walls
  • 52″ double door
  • All dimensions ↓
$8,895 Free shipping
Buy now, build later — or pick your delivery date and we hold the kit

Three things to know before you buy

  • 1
    You'll need a level base. Gravel, slab or deck blocks — sized 12′1″ × 10′1¼″. Not included.
  • 2
    Roof boards are included; the top layer isn't. The 4° slope needs metal, rolled or PVC — shingles won't shed water at that pitch.
  • 3
    It arrives as sanded, kiln-dried, untreated spruce. Bare wood has no weather protection, so stain or paint it within the first few weeks — you pick the color.
What that adds to the budget →
$5,695.00
Adding to cart… The item has been added
Price my whole project
SB
Talk to a real person — start to finish Sizing, foundation, delivery, permits — call (800) 590-2508. We pick up.
  • 1-year warranty on parts & workmanship
  • Sustainably harvested spruce
  • Free shipping, 48 states
  • DIY build, 8–20 hrs

Size & specs

Every dimension, drawn to scale.

The measurement to get right first is the foundation — 11′9¾″ × 11′9¾″. The inside floor and every other number are below.

Dimensioned drawing — outside front & sidePerson 5′9″ shown for scale
Footprint — top view, inside dimensions136 sq ft inside

In the box — and not

One pallet. Almost everything.

Every wood part is pre-cut and numbered. Three things are deliberately left to you, because climate and taste vary too much to ship one answer.

Included in the kit

  • Double tongue-&-groove wall panelsSustainably harvested Norway spruce, untreated
  • Roof boards, floor kit & joistsT&G spruce floor on pressure-treated joists
  • Glazed double door, lock & keys4′4″ × 6′2″ dual-pane glass
  • 1 tilt-&-turn window2′3″ × 3′ dual-pane
  • All hardware, manual & blueprintPlus the full video library — build in 1–2 days

You'll add — and roughly what it costs

  • Foundation DIY $250–700 · pro slab $1,200–2,500Level, well-drained, 11′9¾″ × 11′9¾″. Built before the pallet arrives — size it in the foundation calculator.
  • Roofing material $200–600The 15° slope needs metal, rolled or PVC roofing — shingles won't shed water at that pitch.
  • Stain or paint $100–3001–2 gallons outside, about a gallon inside, and a quart for trims and floors. Try the colors on the 3D model before you buy a can.

Typical owner-built total: the kit price plus $550–$1,600 in materials. Hiring out the base and the build adds roughly $2,700–$5,500.

Price my project — free calculator Numbers feel fuzzy? Call (800) 590-2508 and we'll walk it with you.

Make it yours

Put the light where you want it.

One kit, 4 factory-verified layouts. Tap one to compare, or inspect it in 3D — the free ones you decide during assembly, at no extra cost.

Double doors · Window
Double doors · Window Keep the standard Optima front wall exactly as supplied.

Every layout is a complete, factory-verified arrangement — rendered from the same CAD geometry as the assembly manual.

Add-on double window

$495

Flower box

$195

Window shutters

$255

Veranda deck

$995

Add-ons

Compatible accessories.

From our warehouse to your curb

Delivery, then a weekend.

Step 1

Order — on your schedule

Buy now, build later: tell us when you want delivery and we hold the kit. Free shipping in the lower 48.

Step 2

Arrives in 1–3 weeks

One flat-packed pallet, about 2,260 lbs, every board pre-cut and numbered.

Step 3

Curbside drop-off

The dispatcher calls to agree a window. The pallet is too big for a liftgate, so it comes off by hand — plan on two people for about an hour. Driver-assisted unloading and expedited delivery can be added for a fee; ask us for a quote when you order.

Step 4

Build it — 8–20 hrs, 2 adults

Check the pallet against the packing list in the first 30 days — anything damaged or missing ships free. Boards interlock tongue-and-groove; no framing skills needed. Manual, blueprint and video library included. Prefer not to? A local handyman can build it — ask us and we'll recommend someone if we cover your area.

Tight street, steep drive, or an island address? Call before ordering — we'll check the route with the carrier so there are no surprises on the day.

Customer reviews

What shed owners say.

5 out of 56 verified reviews
Chad LaComb ★★★★★

Beautiful structure!

“Beautiful structure!”

Verified buyer · 5th Feb 2025
Steve ★★★★★

Spectacular value

“I'm blown away by this shed that I'm using as a home office. Took about 3 weeks to arrive in CA. It was a blast to install, with the main body taking about a day. I added a hardwood floor and a layer on the roof with insulation (you can't insulate the walls). I added the extra double window, although it needed adjustments to the supporting boards to fit properly. Door is very nice, but the wood is very green, and the resulting warp is drafty and requires some insulation (on that note...you must build IMMEDIATELY upon receipt because the wood is so green). The shed is HUGE and high quality. I may have the nicest office in the company now, and at an amazing price!”

Verified buyer · 15th Nov 2022
Victoria Downie ★★★★★

Fantastic product and service!

“We had a great experience from beginning to end. We got our shed fast and the driver was great and very helpful. It was easy to set up and their customer service was fantastic with all the questions we had. We are VERY VERY pleased with our purchase!”

Verified buyer · 13th May 2021
Adam ★★★★★

Shed review

“First: The customer service was outstanding! Because I'm pretty inexperienced with this sort of thing, I emailed repeatedly with questions and always received fast and helpful replies, often with useful illustrations. The construction is as easy as promised. Everything made sense and went together easily. Instructions say two people can do it. Probably true, but with limited experience and local temperatures in the high 80s, we found it helpful to have a third pair of hands sometimes -- just for hauling lumber and especially for raising the gables. The shed looks terrific and is very tight and solid. Highly satisfied.”

Verified buyer · 27th Jun 2020
Michael ★★★★★

Excellence customer service

“It does not look or feel like a shed. I bought the Optima 12x10 for a storage shed, but I feel I have no problem to live in there. Looks and feels much better than most of the shed in the market. Great design and quality. It is my second shed I bought, the first for me and this for my father in law.”

Verified buyer · 23rd May 2019
David Cady ★★★★★

i love this shed, but could be a little better

“I purchased this shed in 2018 a few months after my workshop was demolished by hurricane Michael. The hurricane was a cat 4, almost cat5, and wreaked havoc on the town of panama city. I was very excited to get this shed as it looked so much better than my old pole barn. It went together very smoothly, quickly, and all the parts fit very well, I also like the hardware that came with the windows and doors. It didn't come with a subfloor, so I had to build one, and that is an extra cost. I put 8" timber-lock screws through the bottom boards into the subfloor so that should hold well. I put a metal roof on too, which looks much better than asphalt, and will hold up well, but that cost is extra too. A side note, don't use tar paper under the metal, as it gives off an odor on the inside of shed. All in all I am very pleased. The side boards have developed a few cracks, but that is to be expected with wood exposed to the elements. I have yet to put a finish on the exterior, but I think I will prime and paint it as I live in Florida, and the humidity and constant sun exposure is very harsh to even wood that is finished with a varnish or polyurethane. The only problem I have is with the thickness of the boards, and the wind straps that came with it. I think that for this size shed, it may be better to have 1 1/2" thick boards for the sides. The walls do move a little when pressed on them in the middle, not much, but thicker boards I think would alleviate this problem. Also the straps that came with the shed are not very strong. A log cabin has good structural integrity simply from the weight of the logs. But these boards don't have a lot of weight, so another means must be fashioned to hold the sides down. It came with 2x2 boards that had some metal brackets that helped, but I'm not sure they are strong enough. I will probably put a long metal strap in each corner, but being a woodworker, I know how much wood can expand and contract with the humidity, and after time, the straps will not be tight. I will probably just have to readjust the straps periodically to compensate. I'm not sure what other solution there is to this problem. But other than that it is a great shed, and I'm really looking forward to using it to do my woodworking.”

Verified buyer · 29th Mar 2019

Read all SolidBuild reviews on Trustpilot · Customer video stories

Common questions

Frequently asked questions.

At 136 sq ft this model is over the 120 sq ft threshold most US counties use, so plan on a permit — the included blueprint is what the building department will ask for. Rules vary by county and HOA, so one call to your local building department settles it. Every kit includes a blueprint you can hand them if plans are asked for.
A level, well-drained base sized 12′1″ × 10′1¼″, flat within ¼″. A compacted gravel pad, deck blocks or a timber frame all work; a concrete slab is the premium route but is not required. Most owners do it in an afternoon for $250–$700. The foundation calculator gives you the shopping list and cut list.
The 4° slope needs metal, rolled or PVC — shingles won’t shed water at that pitch. Budget $200–600 for 166 sq ft of roof area. Roof boards themselves are included in the kit.
Most owners finish in 8–20 hrs, 2 adults with basic tools — hammer, drill, level, ladder. The wall boards interlock tongue-and-groove, so no framing skills are needed. Manual, blueprint and video library are included, and the support line answers mid-build questions. If you would rather not build it yourself, a local handyman can — we can recommend services in some areas, so ask before you order.
Yes. Insulate the roof above the T&G boards under your roofing layer, and the floor between the joists. The walls are solid 1⅜″ double T&G spruce with good thermal mass; pair with a mini-split for full climate control.
Yes — most office and studio builds do. Conduit surface-mounts neatly along the solid wood walls with clips, so no in-wall channels are needed and the wiring stays inspectable. Plan the trench or overhead run before the build. A shed under 120 sq ft rarely needs a building permit, but the electrical work usually does — ask your city whether it wants a permit and an inspection.
Free curbside freight in the lower 48. One flat-packed pallet of about 2,260 lbs arrives 1–3 weeks after ordering; the dispatcher calls first to agree a window. The pallet is too big for a liftgate, so it comes off by hand, board by board — plan on two people for about an hour. Driver-assisted unloading and expedited delivery can be added for a fee; ask us for a quote when you order.
The two opening side windows install toward the front or the back of the side walls — you decide during assembly, at no cost. The French door and the two tall front windows are engineered into the front wall panel and cannot move. An add-on double window ($495) can go into either side wall.
Call (800) 590-2508 ext. 1 within 30 days of delivery and the replacement part ships free within 10 business days. The 1-year limited warranty covers manufacturing and workmanship defects.

See all answered questions

Second-guessing the size?

The two nearest neighbors.

Most people who return to this page were deciding between these three. Same build, same wood — only the footprint changes.

Still torn? Call (800) 590-2508 — tell us the room you want and we'll tell you which one fits it.

Environmental commitment

25 trees planted with every purchase.

Every order plants 25 trees through the Cauvery Calling movement. The shed itself is slow-grown Norway spruce from our own family mill, sustainably harvested and milled to order.

Sustainably harvestedFamily mill25 trees per shed