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HomeAccessory Dwelling Unit Adu House PlansSpacious ADU With Oversized Garage and Bright Second-Floor Master Suite

Spacious ADU With Oversized Garage and Bright Second-Floor Master Suite

Plan #X7320-A · 887 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
$135k – $220kFree zip estimate ↓
Have questions about this plan? Book a free plan review with David →
David Park · Residential Plan Advisor · 30+ years
887
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 an ADU on a compact lot (28 ft by 35 ft footprint)
  • Need a 2-car garage with extra storage or workspace (980 sq ft garage with 16 ft ceiling height)
  • Want a second-floor master suite with laundry access from the bedroom
  • Seeking rental income or a guest house (self-contained 887 sq ft unit)
  • Prefer a walk-in closet and private master bath in a small footprint
! May not be the best fit if you…
  • Need more than 1 bedroom—this plan has 1 bedroom only
  • Want multiple bathrooms—this design has 1 full bath
  • Require a single-story layout—this is a two-story design with internal stairs
  • Need a large living area (887 sq ft heated space is compact)
  • Want a main-floor master suite—the bedroom is on the second floor

This plan tends to appeal to:

ADU BuildersAccessory Dwelling Unit OwnersRental Property InvestorsVacation Home BuildersDownsizers
Think this is the one? Choose your package above and check out when you're ready.Yes — this plan fits me →

Floor Plans

Tap to zoom · Download sample

Main Level — 887 sq ft · 28.00′W × 35.00′D

↓ Free Sample
X7320-A The Winthrop 35 Enclosed Stairs House Garage Floor Plan 1 Bed 1 Bath

Choose Your Package

Not sure? Call us — we'll help
PDF Set
Build as-is or minor changes
$1,095
  • Complete working drawings (PDF)
  • Instant delivery to your email
  • Unlimited build license included
  • Copyright release — print as needed
  • AutoCAD DWG files not included
Chief Architect Files
$2,190
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed

About this plan

Efficient ADU with Oversized Garage and Second-Floor Master

The Winthrop 35 Enclosed Stairs is an accessory dwelling unit plan combining 887 sq ft of heated living space with a 980 sq ft two-car garage, totaling 1,867 sq ft across a 28 ft by 35 ft footprint. This two-story design positions the garage on the ground level with an enclosed internal staircase leading to the primary residence above, creating a clear separation between utility and living zones.

The upper-level living area features an open-concept kitchen and family room with 9 ft ceiling heights that enhance natural light and volume. The master suite includes a walk-in closet and direct access to a second-floor laundry station, minimizing transit time for household chores. This configuration is ideal for property owners seeking an ADU, guest suite, or standalone rental income asset.

Built with a 10:12 roof pitch and reaching 26 ft 11 in in maximum height, the design establishes a traditional carriage house profile. The 980 sq ft garage provides substantial capacity for two vehicles plus additional storage or workspace, while the 9 ft ceiling heights on both floors maintain consistent vertical scale throughout the building.

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)887 sq ft
2nd Floor887 sq ft
Bedrooms1
Full Bathrooms1
Stories2.0
Width of House28′
Depth of House35′
Building Height26′11″
1st Floor9′
2nd Floor9′
Garage2-car, front-load
Garage Area980 sq ft
FoundationSlab
Wall Framing2x6
Roof Pitch10:12

Key Features

2.0-story layout
1 bedrooms · 1 full baths
9-ft ceilings on the main level
2-car garage
28.00′ × 35.00′ 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 #X7320-A
HOUSE · 887 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
$133k
Most common
Mid-range
$173k
Premium
$231k+
Indicative range at ~887 sq ft ($150–$260/sq ft nationally). Location, contractor & finish significantly affect final cost.
Refine for your location
Tiers above are baselined on Wichita, KS. Enter your own location for an exact Estidraft estimate.
Free · We email you the full line-item PDF.

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.

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