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HomeAccessory Dwelling Unit Adu House PlansStylish 604 Sq Ft Carriage House with Spacious Garage and Private Suite

Stylish 604 Sq Ft Carriage House with Spacious Garage and Private Suite

Plan #AD6407-A · 604 sq ft · 1 bd · 1 ba · 2.0 story · 2-car

Accessory Dwelling Unit Adu House PlansCarriage House Plans Garage Apartment Plans Adu DesignsCottageTwo Story
★★★★★Read 687+ verified reviews →
Estimated cost to build the home
$90k – $150kFree zip estimate ↓
Have questions about this plan? Book a free plan review with David →
David Park · Residential Plan Advisor · 30+ years
604
Sq Ft
1
Beds
1
Baths
2.0
Stories
2
Garage
9′
Ceilings
“We kept coming back to this plan — it just felt right for our family. The flow between the kitchen and living room works.”Verified buyer · Trustpilot
40+
Years in Business
3,000+
Plans in Catalog
10%
Beat Any Competitor Price
Expert
In-House Design Team
Quick self-check · 30 seconds

Is this the right plan for you?

Most regret comes from buying a plan that doesn't fit your life. Skim this before you decide.

Great fit if you…
  • Building on a small or narrow lot — the footprint is just 26 feet wide by 28 feet deep
  • Looking to add rental income or a guest suite — designed as a standalone accessory dwelling unit
  • Need secure storage for two vehicles plus living space (2-car garage with 604 sq ft of living area above)
! May not be the best fit if you…
  • Want a traditional single-family home with bedrooms on separate floors — the master suite is the only bedroom at 604 sq ft total
  • Need significant entertaining space — the keeping room and kitchen are compact within the 604 sq ft layout
  • Prefer single-story living — this is a two-story design with stairs between the garage and living quarters

This plan tends to appeal to:

Accessory Dwelling Unit BuildersRental Property InvestorsSmall Lot OwnersGuest House Builders
Think this is the one? Choose your package above and check out when you're ready.Yes — this plan fits me →

Floor Plans

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Main Level — 604 sq ft · 26.00′W × 28.00′D

↓ Free Sample
floor plan

Choose Your Package

Not sure? Call us — we'll help
PDF Set
Build as-is or minor changes
$890
  • Complete working drawings (PDF)
  • Instant delivery to your email
  • Unlimited build license included
  • Copyright release — print as needed
  • AutoCAD DWG files not included
5 Prints
$990
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed
5 Prints + PDF
$995
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed
CAD Set
Significant modifications or custom design
$1,750
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed

About this plan

Carriage House with Two-Car Garage

This carriage house plan offers 604 square feet of efficient two-story living, with all primary spaces concentrated on the second floor above a spacious 2-car garage. The compact 26-foot by 28-foot footprint makes it an ideal accessory dwelling unit for smaller lots, while the 604-square-foot garage below provides secure vehicle storage or additional utility space.

The second-floor layout includes a kitchen, keeping room, laundry area, and private master suite served by a full bathroom. Nine-foot ceilings on the ground floor and 8-foot ceilings above create an open, airy feel despite the compact square footage. The steep 10:12 roof pitch and 22-foot 8-inch building height contribute to a traditional carriage house aesthetic while supporting effective water runoff.

This design excels at maximizing vertical space on tight lots, combining vehicle storage with a self-contained living environment that functions as a rental property, guest quarters, or independent studio.

What's included in this plan
  • Exterior elevations (all sides)
  • Detailed floor plan(s) with dimensions
  • Foundation plan
  • Roof plan
  • Schematic electrical layout
  • Building cross-sections
  • General notes & specifications
Not included (handled locally)
  • Architectural / engineering stamps
  • Site & grading plan
  • Structural / framing calculations
  • Plumbing & HVAC layouts
  • Energy-compliance documents
  • Material take-off list
These are typically prepared by your local builder or engineer to meet your jurisdiction's requirements.

Complete Plan Specifications

Total Living (heated)604 sq ft
1st Floor604 sq ft
2nd Floor604 sq ft
Bedrooms1
Full Bathrooms1
Stories2.0
Width of House26′
Depth of House28′
Building Height22′8″
1st Floor9′
2nd Floor8′
Garage2-car, front-load
Garage Area604 sq ft
FoundationSlab
Wall Framing2x4
Roof FramingStick
Roof Pitch10:12

Key Features

2.0-story layout
1 bedrooms · 1 full baths
9-ft ceilings on the main level
2-car garage
26.00′ × 28.00′ footprint
Unlimited build license included
Copyright release — print as many copies as you need
Builder-friendly construction drawings

Modify This Plan

Free quote in 1–3 business days · In-house design team
In-house design team · Family-owned since 1983

Need a 4th bedroom, a different foundation, or 8 more feet of width?

Two quick steps. We'll reply with a fixed-price quote — no obligation, and no charge until you approve.

1–3 days
To send your quote
~2 wks
Typical revision time
Free
Until you approve
Direct
To the architect
1
Your contact
2
What to change
PLAN
Plan #AD6407-A
GARAGE · 604 sq ft · 1 bd / 1 ba / 2-car

First — where should we send your quote?

We only ask for what we need to get back to you. No address, no marketing.

Free quote — no charge until you approve·Direct to our in-house architect·40+ years modifying plans

What will this cost to build?

Most buyers are off by 20–30% before checking this.
Budget
$262k
Most common
Mid-range
$303k
Premium
$343k+
Modeled on Wichita, KS — our US price-baseline city. Use the form below to generate an exact estimate for your own location.
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Still deciding?

Book a free 15-min plan review with David Park.

David has 30+ years in residential design and construction documents. He'll walk through this plan with you — foundation options for your lot, modification possibilities, and exactly what's in the construction documents you'd receive. No pitch. No fee.


Reviews across all our plans — see plan-specific reviews on Trustpilot →

★★★★★

JoAnne and the entire staff was extremely helpful and patient with us while we decided between 2 homes. Outstanding curb appeal and a great layout perfect for us.

R
Rita Long · Milwaukee, WI
Plan: Cranberry Gardens
Verified buyer · Trustpilot
★★★★★

We've had an amazing experience with our new home. The customer service we received during our modifications was exceptional — they walked us through every change.

S
Sandra Hawkins · Montgomery, AL
Plan: Dunrobin Castle
Verified buyer · Trustpilot
★★★★★

We compared three plan sources and Archival's pricing + free design call won us over. Our builder said the construction docs were the cleanest he'd seen.

M
Mark Chen · Boise, ID
Plan: Pepperwood Place
Verified buyer · Trustpilot

→ Read all 687+ reviews on Trustpilot


Frequently Asked Questions

Can't find your answer? Call (888) 890-2353

For most buyers, the PDF Set is the right choice — instant delivery, unlimited build license, and easy to share with your builder. If you plan significant modifications or are building in CA, OR, WA, or NV, go with CAD + PDF so your designer can edit the source files. Still not sure? Call (888) 890-2353 and a real person will help you choose.

Still have questions about this plan? Talk to a real person — no pitch, no fee.

Starting at
$890
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