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Studios & offices · Farmhouse

The Ranch Office: 12 x 20 Backyard Office Plan with Half Bath

The Ranch Office is a 240 sq ft backyard office plan with a 15 x 12 ft work room, a half bath, a storage closet and a covered porch, on a 12 x 20 ft slab.

The Ranch Office 3D rendering, front view
  • 240sq ft
  • —bedrooms
  • 0.5baths
  • 1level
  • 20' x 12'footprint

Inside The Ranch Office plan set

Preview each drawing before you buy. The full set adds every dimension, the door, window, panel and fixture schedules, framing details and the Texas code notes on each sheet.

The Ranch Office floor plan: office, half bath, closet
RoomSizeArea
Office15'-0" x 12'-0"180 sq ft
Half Bath5'-0" x 6'-0"30 sq ft
Closet5'-0" x 6'-0"30 sq ft

Sheets in the drawing set

  • A0.0 Cover Sheet & Project Data
  • A1.0 Floor Plan & Schedules
  • A2.0 Exterior Elevations
  • A3.0 Building Section & Assemblies
  • S1.0 Foundation Plan
  • S2.0 Roof Framing Plan & Headers
  • E1.0 Electrical Plan & Panel Schedule
  • P1.0 Plumbing Plan & Fixture Schedule
  • G1.0 Materials List
  • G2.0 Cost Estimate

Files in your download (939 KB zip)

  • README.txt3 KB
  • The-Ranch-Office-Construction-Drawings-24x36.pdf122 KB
  • The-Ranch-Office-CAD-Drawings.dxf100 KB
  • The-Ranch-Office-Materials-List.csv8 KB
  • The-Ranch-Office-Cost-Estimate.csv1 KB
  • 3D-Model/The-Ranch-Office.obj83 KB
  • 3D-Model/The-Ranch-Office.mtl1 KB
  • Images/ (11 PNG renders and drawings)912 KB

Floor plan highlights

  • The porch opens into the main office room.
  • A half bath and a storage closet share the end wall.
  • A small tankless heater under the sink supplies hot water.
  • Works as a home office, a ranch office or a client meeting room.

Key features

  • 15 x 12 ft office for two desks or a meeting table
  • Half bath, so nobody walks back to the house
  • Storage closet for files and supplies
  • Covered porch
  • Point-of-use water heater

Texas tip: A half bath needs a sewer or septic connection; on rural land, confirm septic capacity first.

Plan specifications

Total living area240 sq ft
BedroomsNo bedroom
BathroomsHalf bath
LevelsSingle level
Footprint20' x 12'
Overall height12' 6"
Ceiling height9' flat
Roof6:12 gable, standing-seam metal
Exterior walls2x6 wood framing, board-and-batten siding
FoundationStiffened slab-on-grade for expansive clay (verify with a geotechnical report)
Electrical100A, 120/240V single phase, 6 circuits
Heating & coolingDuctless heat pump, 6,000 BTU
Windows / doors6 windows (SHGC 0.25 max.), 3 doors
Files includedPDF drawing set, DXF (CAD), CSV, OBJ (3D), PNG

Design-build in Texas

Have Cowboy Tiny Homes build it

We build our plans across San Antonio, Austin, Dallas, Fort Worth, Houston and rural Texas: site visit, permit drawings sealed by a Texas engineer where required, the slab designed from your geotechnical report, and construction by one team.

Build it with us: if Cowboy Tiny Homes builds this home for you under a contract signed within 12 months of your purchase, we credit the full plan price toward the build.

  1. Free consult We look at your land, budget and timeline.
  2. Site & feasibility Zoning, utilities, soils and, on the coast, windstorm rules.
  3. Permit set We adapt this plan to your lot and get it engineered.
  4. Build One crew from slab to move-in.

What will The Ranch Office cost to build in Texas?

Built from this plan's own 94-line materials takeoff plus labor by trade, then adjusted for each Texas market. Pick your area and finish level.

Who builds it?
Estimated build cost$86,414$360 per sq ft

Excludes land, utility connections, driveway, the geotechnical report and engineering. Coastal sites add windstorm upgrades. A planning estimate, not a bid.

Site & foundation$10,130
Framing & sheathing$12,534
Roofing$6,755
Windows & doors$4,932
Exterior finish$6,597
Insulation$1,564
Drywall & paint$3,702
Flooring & trim$2,958
Cabinets & counters$832
Electrical$6,569
Plumbing$3,908
HVAC & ventilation$3,302
Fasteners & misc.$1,582

Materials Labor

Open the full cost calculatorGet an exact quote from us

The Ranch Office materials list

Every plan set includes a 94-line takeoff with quantities, units and prices, ready to send to a lumberyard for a quote. The summary by category:

CategoryLinesIncludesMaterials
Site & foundation9Excavation, grading and haul-off; Ready-mix concrete, 3,000 psi; Forms, stakes and pump/finishing supplies…$5,476
Framing & sheathing13Pre-engineered roof trusses, 6:12, 12 ft span, @ 24 in. o.c.; 2x6 studs, 9 ft , exterior walls @ 16 in. o.c.; Porch: 6x6 PT posts, beams, joists and roof framing…$6,114
Roofing7Standing-seam / exposed-fastener metal roofing panels with trim; Gutters 5 in. K-style with downspouts; Ice & water shield at eaves and valleys, 2 square roll…$3,860
Windows & doors6Vinyl single-hung / slider window, low-E, U-0.30 / SHGC 0.25 max., 3'0" x 4'0"; Exterior prehung door 36 x 80 in., fiberglass, half-lite, with lockset & deadbolt; Vinyl single-hung / slider window, low-E, U-0.30 / SHGC 0.25 max., 2'0" x 2'0"…$3,653
Exterior finish5Exterior siding siding; Soffit & fascia, vented; Corner boards, window/door trim 1x4 / 1x6…$3,383
Insulation4Wall insulation R-21 batts or mineral wool; Attic insulation R-38 blown cellulose / fiberglass; Acoustic batts at bedroom and bath walls…$1,009
Drywall & paint4Drywall 1/2 in. drywall, 4 x 8; Interior primer + 2 coats paint; Joint compound, tape, corner bead and screws…$1,424
Flooring & trim5Luxury vinyl plank flooring, waterproof, 20 mil; Bath accessories; Door & window casing / stool…$1,599
Cabinets & counters3Bathroom vanity with top; Wall cabinets 30-36 in.; Cabinet hardware, fillers and toe kick$640
Electrical21Meter base, service entrance cable, ground rods & bonding; Ceiling fan with LED light kit, 52 in., Energy Star, on fan-rated box; Load center 100A main breaker, 20 spaces…$2,628
Plumbing11Tankless electric water heater, point-of-use; Toilet, 1.28 gpf, elongated; DWV fittings, cleanouts, primer & cement…$1,663
HVAC & ventilation3Ductless mini-split heat pump, 6,000 BTU, single zone, inverter, with line set; Condenser pad / wall bracket, condensate pump and disconnect whip; Exhaust duct, caps and dryer vent kit$2,130
Fasteners & misc.3Temporary power, portable toilet and tool rental; Dumpster / waste haul-off; Framing nails, structural screws, connectors, construction adhesive$1,582
Total materials94$35,161

Built for Texas

Permits for a backyard studio in Texas

Accessory buildings without a kitchen are usually simpler to permit than a dwelling, and some Texas cities exempt small buildings altogether. Rules on size, height and setbacks still apply, and adding a bathroom or sleeping area can change how the city classifies it. Ask your building department first. See the Texas tiny house laws guide.

Permits, stamps and engineering

The drawing set is organized the way Texas building departments expect: a cover sheet with code, load and climate notes, plans, elevations, a section, the slab, framing, electrical and plumbing. These are planning drawings, not stamped construction documents. Many cities, lenders and insurers will ask for a Texas-licensed engineer's or architect's seal, a site plan and energy-code forms, so plan for that review before you build.

  • Cooling-first designDrawn for IECC climate zones 2 and 3: radiant-barrier roof deck, R-38 attic, R-21 walls, windows with SHGC 0.25 or less, 18 in. overhangs, shaded porches, ceiling fans and ductless heat pumps sized room by room.
  • Expansive clay soilsThe slab is drawn as a stiffened slab-on-grade with 12 x 24 in. grade beams for moderate soils. Get a geotechnical report for your lot; a Texas-licensed engineer finalizes the slab (or a post-tensioned design) from it.
  • WindFramed for 115 mph design wind (inland Texas, Exposure B) with a continuous load path. Houston-area and Gulf Coast sites need an engineer's wind upgrade, and sites in the TDI catastrophe area need Texas Department of Insurance windstorm certification.
  • TermitesTexas is a very heavy termite area: the plans call for soil treatment or a barrier, treated sill plates and siding kept 6 in. above grade.

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The Ranch Office FAQs

What comes with The Ranch Office plan set?

One zip file with a 10-sheet construction drawing set (24 x 36 in. PDF: cover with Texas code notes, floor plan, elevations, section, foundation, roof framing, electrical, plumbing, materials list and cost estimate), a DXF CAD file, the materials list and cost estimate as spreadsheets (CSV), a 3D model (OBJ) and PNG images.

Will Cowboy Tiny Homes build The Ranch Office for me?

Yes. We build our plans across Texas. Build it with us: if Cowboy Tiny Homes builds this home for you under a contract signed within 12 months of your purchase, we credit the full plan price toward the build. Ask for a build quote.

How do I get the files after I pay?

Right away. After checkout you land on a download page, and we email the same link. It works for a year and up to 25 downloads, and you can get a fresh link at Find my plan download.

Are these plans stamped or permit-ready in Texas?

No. They are planning and permit-development drawings, not stamped documents. Texas cities that require a permit review plans under the IRC with their own amendments, and many want a Texas-licensed engineer's seal, especially on the slab and on coastal wind design. We can arrange that, or your own engineer or architect can review and stamp the set.

Does The Ranch Office work on the Gulf Coast?

With an upgrade. The plans assume 115 mph inland design wind. Houston-area and coastal sites need engineered wind design, impact-rated or protected windows, and, inside the Texas Department of Insurance catastrophe area, TDI windstorm certification (WPI-8).

Can The Ranch Office be modified?

Yes. We can flip the layout, change room sizes, swap the slab for pier-and-beam, or add a porch. Ask for a modification quote.

What does the license allow?

Your purchase includes a license to build one home from the plan. You can print and share the drawings with your builder, lender and permit office for that build. See the terms of sale.

Build The Ranch Office in Texas

Talk with Cowboy Tiny Homes about building this plan on your land, or tailoring it to fit. Free consultation.

Call 210-903-9471