CityPaks Buyer's Guide

Not all ADUs
are built the same.

Custom builder, prefab, or CityPaks? They can all create more room in your backyard. The big difference is how they get there - and what that means for you.

Explore CityPaks
DESIGN IT. BUILD IT THERE.
Custom / Design-Build
Pathway 01
  1. 1Blueprint↓
  2. 2Materials↓
  3. 3Trades↓
  4. 4Built on site

DESIGN IT. BUILD IT THERE.

Start with a design and construct the home at your property.

BUILD IT ELSEWHERE. BRING IT THERE.
Prefab / Modular
Pathway 02
  1. 1Factory↓
  2. 2Completed module↓
  3. 3Transport↓
  4. 4Install

BUILD IT ELSEWHERE. BRING IT THERE.

Much of the home is built away from your property and then delivered for installation.

BRING THE SYSTEM. BUILD IT THERE.
CityPaks
Pathway 03CityPaks
  1. 1Pak system↓
  2. 2Components↓
  3. 3Property↓
  4. 4Assemble↓
  5. 5Finished Pak

BRING THE SYSTEM. BUILD IT THERE.

Start with a designed building system, bring the components to the property, and assemble the Pak on site.

Same destination.

Very different ways of getting there.

The Big Difference

Here's the 10-second version.

Custom / Design-Build

Start with a blank page.

Maximum freedom.

Design the ADU around your property, your preferences and your vision.

The tradeoff

More design decisions and more of the building process happens at your property.

“I want something designed specifically for me.”

Prefab / Modular

Start with a finished model.

Build more of it somewhere else.

Choose from available home designs and have much of the structure built away from your property.

The tradeoff

The completed or substantially completed structure still needs to reach and be installed on your property.

“I like the model and my property works for the delivery and installation approach.”

CityPaks

Start with a building system.

Choose the space. Configure what matters.

Start with Pak 0, Pak 1 or Pak 2, then make meaningful choices about how the space works for you.

The tradeoff

CityPaks is intentionally a system - not unlimited custom architecture.

“I want the right space without starting everything from scratch.”

Compare What Matters

What matters most to you?

Choose what you care about and see how the three approaches differ.

How does the home get into my backyard?

Custom / Design-Build

Materials & trades come to you

Materials and workers reach the site and the structure is constructed there.

Prefab / Modular

A completed structure must arrive

A completed or substantially completed structure must be transported to and positioned on the property.

CityPaks

Components are assembled on site

Building components are brought to the property and assembled into the Pak on site.

Tight backyard? How the ADU gets there matters.

Why the building method matters

Same backyard. Three ways to get a home there.

Every Bay Area property has fences, power lines, narrow side gates, and neighbors. See how each building approach interacts with the exact same lot.

BRING THE BUILDING SYSTEM TO THE PROPERTY.
Bay Area Lot Reality · Visual Study
Property Access: 4ft Side Gate OK
Precision Building System

BRING THE BUILDING SYSTEM TO THE PROPERTY.

Precision-engineered building components navigate normal Bay Area gates and property setbacks without cranes or street closures, assembling into a permanent Pak.

CityPaks Reality

The CityPaks way: The system travels to the yard, then assembles cleanly on site.

Precision-engineered building components navigate normal Bay Area gates and property setbacks without cranes or street closures, assembling into a permanent Pak.

Site Access Breakdown

Compact components pass standard 4ft (minimum) residential gates

Clean component staging · Rapid on-site envelope assembly · No crane

Gate Clearance

Gate Clearance 4ft (minimum)

Crane Requirement

No overhead crane required

On-Site Assembly

Precision component envelope

Architecture

True rectangular high-spec living

1Stage 01

Building System

Precision Pak envelope & components

2Stage 02

4ft Gate Access

Components carried down 4ft (minimum) side path

3Stage 03

System Assembly

Precision assembly directly on site

4Stage 04

Finished CityPak

Sophisticated modern living space

The finished home may look simple.
How it gets there isn't.

The Tradeoffs

There isn't one right way to build every ADU.

The better question is which approach fits what you value.

Custom / Design-Build
“I want exactly what I want.”

You may value

  • Maximum architectural freedom
  • Highly individualized design
  • Designing around unique property conditions

You accept

  • More design decisions
  • A more custom project process
  • More site-based construction

Custom may make sense when design freedom comes first.

Prefab / Modular
“I'd rather have more of it built somewhere else.”

You may value

  • Established models
  • Factory construction
  • Less structural construction occurring in the backyard

You accept

  • Choosing within a manufacturer's product line
  • Transportation and installation considerations
  • Property access still matters

Prefab may make sense when off-site construction comes first.

CityPaks
“I want to make this simpler.”

You may value

  • A designed starting point
  • Meaningful choices
  • A repeatable building system
  • Component-based site assembly
  • Right-sized living

You accept

  • Structured choices rather than unlimited architecture

CityPaks may make sense when you want flexibility without starting from zero.

The CityPaks Difference

We took out decisions.
Not possibilities.

CityPaks starts with a thoughtfully designed building system, then lets you make the choices that change how the space works for you.

Completed rectangular CityPaks Pak 2 two-bedroom ADU with shed roof and black-framed glazing in a Bay Area backyard
01

Right-sized

Pak 0. Pak 1. Pak 2. Start with the amount of space that solves the problem.

02

Configurable

Make the choices that change how you live. Not hundreds of construction decisions.

03

Component-based

Bring the building system to the property rather than requiring a completed CityPak to arrive as one finished structure.

04

Designed as a system

Each project doesn't have to begin with a blank page.

Less: “Where do I even start?”
More: “This is the one.”

The Details

See it side by side.

No approach gives you everything. Here's what changes depending on how you build.

Starting point+
Custom / Design-BuildBlank page / custom design
Prefab / ModularEstablished models
CityPaksPak 0 / Pak 1 / Pak 2
Design freedom+
Custom / Design-BuildHighest degree of freedom
Prefab / ModularVaries by manufacturer
CityPaksStructured flexibility
Where the structure is built+
Custom / Design-BuildPrimarily at property
Prefab / ModularPrimarily off site
CityPaksComponent system assembled at property
Getting it to the backyard+
Custom / Design-BuildMaterials + trades
Prefab / ModularCompleted/substantially completed structure
CityPaksBuilding components
Customization approach+
Custom / Design-BuildDesign from scratch
Prefab / ModularModel + available options
CityPaksPak + meaningful configuration choices
On-site construction+
Custom / Design-BuildSignificant
Prefab / ModularReduced structural construction; site work still required
CityPaksAssembly + required site work
Best fit when…+
Custom / Design-BuildMaximum architectural freedom matters
Prefab / ModularOff-site construction matters
CityPaksA simpler configurable system matters

The goal isn't to crown a winner - it's to help you see which tradeoffs fit your priorities.

Different doesn't mean magic.

You still need a real site.

Every property has conditions that need to be evaluated.

You still need approvals.

An ADU still has to meet applicable permitting and building requirements.

You still have construction.

CityPaks changes the building approach. It doesn't pretend a home appears overnight.

That's why we start with your property.

Completed CityPaks ADU in a realistic Bay Area backyard

Your backyard is different.

Now let's find out what actually works there.

You've seen the differences. The next step isn't choosing a construction category - it's understanding what your property can support and which Pak fits the way you want to use the space.

Lori Larson, Founder of CityPaks
Direct & Personal

Let's discuss what fits your property.

No endless forms or automated sales pressure. Just a direct, thoughtful conversation with Lori about your yard, your goals, and which CityPaks ADU actually works.

Or prefer an online review? Use the Property Fit Tool