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HomeAccessory Dwelling Unit Adu House PlansModern ADU Home – 1 Bedroom, 1.5 Bathrooms

Modern ADU Home – 1 Bedroom, 1.5 Bathrooms

Plan #Z5647-D · 778 sq ft · 1 bd · 1 ba · 2.0 story

Accessory Dwelling Unit Adu House PlansContemporary And Modern House PlansTwo Story
★★★★★Read 687+ verified reviews →
Estimated cost to build the home
$115k – $195kFree zip estimate ↓
Have questions about this plan? Book a free plan review with David →
David Park · Residential Plan Advisor · 30+ years
778
Sq Ft
1
Beds
1.5
Baths
2.0
Stories
Garage
10′
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…
  • Working with a tight lot or narrow property—the plan fits in just 32 ft 6 in wide by 17 ft 0 in deep
  • Need a rental income or guest dwelling without sacrificing main-floor laundry and a master suite (first-floor master, first-floor laundry)
  • Want a two-story layout that feels spacious despite 778 square feet (10-foot first-floor ceilings and two-story grand room)
  • Looking for a home office or dedicated workspace (home office/study on the main floor)
  • Plan secondary living space—a loft with balcony offering room to grow within a small footprint (225-square-foot loft)
! May not be the best fit if you…
  • Need multiple bedrooms for a growing family—this plan has just 1 bedroom
  • Require a one-story layout—this is a two-story design (stairs required to access the loft)
  • Want a separate guest suite with full kitchen and bathroom—the design has 1 full and 1 half-bathroom only
  • Need garage or covered parking—no garage bays are included

This plan tends to appeal to:

Accessory Dwelling Unit BuildersMulti-Generational FamiliesShort-Term Rental InvestorsSmall Lot OwnersWork-From-Home ProfessionalsDownsizers
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 — 778 sq ft · 35.00′W × 35.00′D

↓ Free Sample
floor plan

Choose Your Package

Not sure? Call us — we'll help
CAD + PDF Bundle
$778
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed

About this plan

This contemporary ADU home plan offers 778 square feet of efficiently designed living space across two stories. The compact footprint—just 32 ft 6 in wide by 17 ft 0 in deep—makes it an ideal secondary structure for guest accommodations, rental income, or multi-generational living on properties with limited square footage.

The first floor delivers 553 square feet of open-concept living anchored by a two-story grand room and 10-foot ceilings that maximize vertical space. A first-floor master suite, half-bathroom, and laundry complete the main level, ensuring all essential functions occupy the ground plane. The second floor loft spans 225 square feet and opens to the great room below, serving as a media zone, guest retreat, or additional living area.

Built on a slab foundation with 2x4 wall framing and stick-built roof framing, the structure reaches a maximum height of 27 ft 9 in with an 8:12 roof pitch—proportions suited to residential neighborhoods and typical ADU zoning codes.

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)778 sq ft
1st Floor553 sq ft
2nd Floor225 sq ft
Bedrooms1
Full Bathrooms1
Half Bathrooms1
Stories2.0
Width of House35′
Depth of House35′
Building Height27′9″
1st Floor10′
2nd Floor8′
FoundationSlab / Crawl Space / Basement
Wall Framing2x4
Roof FramingStick
Roof Pitch8:12

Key Features

2.0-story layout
1 bedrooms · 1 full baths
10-ft ceilings on the main level
35.00′ × 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 #Z5647-D
HOUSE · 778 sq ft · 1 bd / 1 ba /

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
$190k
Most common
Mid-range
$214k
Premium
$250k+
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
$778
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