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HomeContemporary And Modern House PlansModern 7,236 Sq Ft Quadplex Townhouse with 3 Levels Per Unit

Modern 7,236 Sq Ft Quadplex Townhouse with 3 Levels Per Unit

Plan #AC6505-A · 7,236 sq ft · 8 ba · 3.0 story · 4-car

Contemporary And Modern House PlansMulti FamilyNew American
★★★★★Read 687+ verified reviews →
Estimated cost to build the home
$1085k – $1810kFree zip estimate ↓
Have questions about this plan? Book a free plan review with David →
David Park · Residential Plan Advisor · 30+ years
7,236
Sq Ft
Beds
10
Baths
3.0
Stories
4
Garage
8′
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 a multi-family investment property — all four units are identical for uniform management and rental income
  • Working with a narrow lot — the 68-ft width accommodates four units with direct garage access for each
  • Seeking density without sprawl — 7,236 sq ft and four units maximize income per square foot of land
  • Need secure, private parking for residents — each unit includes its own 1-car garage
! May not be the best fit if you…
  • Looking for a single-family home — this is a four-unit quadplex with shared structural walls
  • Want large individual garages — each unit has one car of parking (972 sq ft total for four units)
  • Seeking to minimize shared wall construction — this design is inherently multi-family with party walls

This plan tends to appeal to:

Short-Term Rental InvestorsMulti-Family DevelopersDensity-Focused BuildersVacation Home Investors
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 — 7,236 sq ft · 68.00′W × 44.00′D

↓ Free Sample
floor plan

Choose Your Package

Not sure? Call us — we'll help
PDF Set
Build as-is or minor changes
$3,618
  • 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
$3,918
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed
5 Prints + PDF
$3,968
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed
CAD + PDF Bundle
$6,874
  • Complete construction drawings
  • Unlimited build license included
  • Copyright release — print as needed

About this plan

The Castlewood quadplex is a Modern multi-family investment designed to maximize density and income potential. Spanning 7,236 square feet total, this three-story townhouse provides four identical units, each with 1,809 square feet of heated living space. The design occupies a compact footprint of 68 feet wide by 44 feet deep, making efficient use of land while maintaining the vertical separation that residents expect.

Each unit is vertically stratified across three levels. The ground floor (466 sq ft) provides entry and utility access. The main living level (664 sq ft) features an open-concept kitchen, dining, and living area with 8-foot ceilings and clear sightlines between zones. The upper floor (679 sq ft) houses private bedroom suites, ensuring separation between common and private quarters within each unit.

The entire complex includes 8 full bathrooms and 4 half bathrooms distributed across the four units, ensuring consistent access to sanitation facilities. Outdoor amenities total 240 square feet of porch and 184 square feet of deck space per unit. A 972-square-foot garage provides secure, direct-access parking — one car per unit — while minimizing the overall lot footprint. Construction features 2x6 wall framing and truss roof framing, designed for the durability required by a three-story multi-family configuration.

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)7,236 sq ft
1st Floor1,864 sq ft
2nd Floor2,656 sq ft
3rd Floor2,716 sq ft
Rear Porch240 sq ft
Total Porch240 sq ft
Deck184 sq ft
Full Bathrooms8
Half Bathrooms4
Stories3.0
Width of House68′
Depth of House44′
Building Height31′9″
1st Floor8′
2nd Floor8′
3rd Floor8′
Garage4-car, front-load
Garage Area972 sq ft
FoundationSlab
Wall Framing2x6
Roof FramingTruss
Roof Pitch3:12

Key Features

3.0-story layout
8-ft ceilings on the main level
4-car garage
68.00′ × 44.00′ 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 #AC6505-A
HOUSE · 7,236 sq ft · bd / 8 ba / 4-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
$942k
Most common
Mid-range
$1021k
Premium
$1242k+
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.

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