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Accessory dwelling units

ADU Builder Page Software for Provider Teams

For service teams across all 50 states, PORTREX turns ADU Builder demand into qualification questions, configurable options, verified proof requirements, and proposal CTAs.

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Finished detached accessory dwelling unit behind a U.S. homeService photoDetached backyard ADU hero
Detached ADU media for nationwide homeowner review.
Direct answer

Answer-first copy for provider service pages

PORTREX is provider software, not a local contractor marketplace. This page shows how a service company can publish a clear ADU Builder experience with qualification, proof, and proposal routing.

An ADU builder helps a homeowner add an accessory dwelling unit, such as a backyard cottage, basement apartment, garage conversion, in-law suite, or modular home. The service is for owners who need rental income, multigenerational housing, more private living space, or a higher-value property without moving. A good ADU workflow starts with buildability screening, zoning and access review, model selection, financing options, and a licensed provider proposal. PORTREX presents those steps in one page so a contractor can qualify the property, explain likely constraints, route financing, and book a site inspection before final permitting and pricing are confirmed.

Service intelligence

A richer sales flow than a static landing page.

Each page gives a provider a structured workflow: qualification, scope paths, program references, cross-sell routes, and proposal actions.

Configurable Paths7Pricebook-ready offers
Program Checks2Source-linked references
FAQ Answers6Structured for GEO
Related Routes3Next-service paths

Proposal Readiness

What the page already gives a rep before the site inspection.

Qualification4 fit signals
Scope Options7 configurable paths
Program Checks2 source-linked references
Proposal Actions5 CTA routes
AI Answer Coverage6 Q&A entries
AI tools

Interactive calculators that make the service feel actionable.

This on-page model gives the homeowner and provider a transparent preliminary signal. Final pricing, approval, eligibility, and scope still come from the provider Pricebook and licensed review.

AI Project Calculator

Score project fit from urgency, home age, scope depth, program checks, and bundle intent.

100/ 100

High-Intent Proposal

Recommended path: Interior ADU. Use Get Proposal as the next step and keep final pricing inside the provider Pricebook.

Build This Calculator

Page Structure Index

Calculated from this page's visible sections, FAQ depth, related routes, program checks, and proposal actions.

IntScoProProProFol
Intent100 Structure IndexFollow-up

Value Lever Calculator

Translate discovery answers into the levers a rep should explain first.

Need Signal27%
Scope Depth43%
Program Complexity26%
Cross-Sell Potential36%

Next Best Offer

Keep the visit moving without turning the page into a generic quote form.

Recommended OptionInterior ADU

Reconfigure part of the existing home into a compact independent unit with code-compliant life safety.

Bundle RouteRemodeling & ConversionsView related page
Quality GateHuman Review Before Publish

Use verified photos, reviews, licensing, and local eligibility before publishing provider-specific pages.

Statistical Signals

Content depth that supports comparison, retrieval, and sales enablement.

7Configurable paths
2Program references
6Search-ready Q&A entries
3Cross-sell routes
  • Structured comparison table
  • Structured FAQ markup
  • Pricebook-safe proposal CTAs
ADU showcase packet

Models, floor plans, and sales-story assets in one place.

A provider can use this service page to walk homeowners from model comparison through buildability, financing, comfort planning, proposal, and inspection follow-up.

ADU showcase · Model comparison

Give homeowners a visual model lineup before the site visit.

The ADU service flow combines buildability screening, model selection, floor-plan review, financing, provider proposal, and site inspection follow-up in one customer-facing experience.

KitchenLaundry1 BathroomOptimized LivingSmart Home Standard
Studio Smart ADU floor plan with kitchen, living and sleeping zone, bathroom, laundry, and storage
Floor PlanRetreat Studio / Aspen300-400 sq ft · Studio
One-bedroom Smart ADU floor plan with kitchen, living room, bedroom, bathroom, laundry, and storage
Floor PlanRetreat One / Willow450-650 sq ft · 1 Bedroom
Two-bedroom Smart ADU floor plan with two bedrooms, kitchen, living room, bathroom, laundry, closets, and porch
Floor PlanRetreat Two / Haven650-900 sq ft · 2 Bedroom
Animated one-bedroom ADU floor-plan walkthrough
Floor Plan Motion TourA guided concept pass from compact living zones to private sleeping, bath, laundry, and storage.
Animated compact ADU interior walkthrough
Finished ADU WalkthroughInterior, appliances, and heat-pump-ready comfort planning presented as one homeowner story.

Retreat Series

Straightforward plans for rental income, family space, or a private backyard suite.

Retreat StudioStudio
300-400 sq ft
Retreat One1 Bedroom
450-650 sq ft
Retreat Two2 Bedroom
650-900 sq ft

Signature Series

A more elevated finish path with the same smart, repeatable ADU core.

AspenStudio
300-400 sq ft
Willow1 Bedroom
450-650 sq ft
Haven2 Bedroom
650-900 sq ft
Media stack

Show the work, the route, and the next project visually.

These image-led modules give the provider a richer story than plain copy: current service, related service routes, proof moments, and approved media.

Finished detached accessory dwelling unit behind a U.S. homePrimary serviceADU & Modular HomesHVAC technician installing a ductless mini-split in a U.S. homeRelated routeHeat PumpsLicensed electrician working on a 200-amp electrical panelRelated routeElectricalFinished basement remodel with contractor in a U.S. homeRelated routeRemodeling & Conversions
Who it is for

When to recommend ADU & Modular Homes.

These pages support solo providers, single-trade shops, and multi-service brokers who enable several service lines from one PORTREX workspace.

Homeowners with unused yard space, garage space, basement space, or a large existing footprint.
Families planning multigenerational living, caregiver housing, or a private in-law suite.
Owners evaluating rental income, equity gain, or flexible guest space.
Providers that sell modular, site-built, conversion, or tiny-home ADU packages.
Options and configurations

Service paths your Pricebook can configure.

ADU model and construction pricing is pulled from the provider Pricebook after qualification.

Prefab detached ADU installation in a backyardService photoPrefab detached ADU
Prefab detached ADU media.

Pre-Fab Detached

Factory-engineered modular ADU line delivered and installed when access, foundation, and utility conditions fit.

  • Studio, 1-bed, and 2-bed model paths
  • 3D renders, floor plan, materials, and warranty
  • Crane and access review before proposal
Ground-up ADU framing on a residential lotService photoGround-up ADU
Ground-up ADU media.

Ground-Up Construction

Site-built ADU for lots where a modular set is not practical or the homeowner needs a custom footprint.

  • Custom envelope and foundation
  • No-crane access path
  • Provider-selected finishes and appliance package
Basement ADU conversion with kitchenette and egress windowService photoBasement ADU
Basement ADU media.

Basement Conversion

Turn existing lower-level space into legal living or rental space where ceiling height, egress, and code allow.

  • Egress and moisture review
  • Bath, kitchenette, and entry planning
  • Permit path validated by local officials
Garage conversion ADU with new windows and sidingService photoGarage conversion ADU
Garage conversion ADU media.

Garage Conversion

Convert attached or detached garage space into conditioned living space with utilities, insulation, and code upgrades.

  • Slab, structure, and utility review
  • Separate entrance planning
  • Good fit for in-law or rental layouts
Above-garage ADU addition over an existing garageService photoAbove-garage ADU
Above-garage ADU media.

Above-Garage Unit

Add a new living unit above a garage when structure, setbacks, stairs, and utility routing can support it.

  • Structural upgrade review
  • Private stair and entry design
  • Useful for dense lots with limited yard space
Interior ADU renovation inside a residential homeService photoInterior ADU
Interior ADU media.

Interior ADU

Reconfigure part of the existing home into a compact independent unit with code-compliant life safety.

  • Entry, fire separation, and utility planning
  • Studio and 1-bed layouts
  • Often faster than detached construction
Tiny home ADU in a landscaped backyardService photoTiny home ADU
Tiny home ADU media.

Mini / Tiny Homes

Small-footprint units for homeowners who want a lower-complexity housing option where zoning and utilities allow.

  • Compact appliance package
  • Efficient envelope and HVAC planning
  • Preliminary GIS screening before site visit
Key benefits

Clear reasons a homeowner should care.

Benefit copy stays homeowner-readable while the underlying offer, bundles, eligibility, and pricing remain provider-configured.

Creates flexible rental, family, guest, or caregiver housing.

Can increase property utility and long-term equity.

Pairs well with heat pumps, electrical upgrades, and solar-ready planning.

Lets providers package qualification, financing, design, and site inspection in one flow.

Incentives and rebates

Program facts are selling points, not provider prices.

Provider pricing never appears publicly. Incentive references carry source labels and current-eligibility warnings.

Housing agency / lender review

Local ADU financing programs

ADU financing varies by state, municipality, lender, income, and property type. PORTREX should route homeowners into a provider-specific financing review.

Source: Housing agency / lender reviewVerify current eligibility before quoting or publishing.
Municipal zoning and permitting

Local ADU zoning

ADU rules vary by state and municipality, including size, setbacks, owner-occupancy, parking, utility, and life-safety requirements.

Source: Municipal zoning and permittingGIS and zoning checks are preliminary screening only, not permit approval.
How it works

From first screen to provider proposal.

Qualification can happen during the first consultation; design, permits, financing, fabrication, and construction timelines are verified per provider and municipality.

1

Run a buildability and service-area screen.

2

Collect property, access, utility, and household-use details.

3

Compare detached, conversion, above-garage, and modular paths.

4

Estimate rent, equity, payment, and cash-flow scenarios without provider pricing.

5

Book a licensed site inspection and permitting review.

Comparison

Detached ADU vs. conversion ADU

Structured comparisons make the page easier for homeowners, search engines, and AI answer engines to cite accurately.

Decision factorDetached / modular ADUBasement or garage conversion
Best fitSeparate backyard or side-yard living unitExisting underused space in the home or garage
Primary constraintLot access, setbacks, foundation, utilitiesCeiling height, egress, moisture, structure
Homeowner valueMore privacy and rental appealOften less exterior site work
Proposal gateBuildability and crane/access reviewCode, life-safety, and habitability review
Best fit
Detached / modular ADU

Separate backyard or side-yard living unit

Basement or garage conversion

Existing underused space in the home or garage

Primary constraint
Detached / modular ADU

Lot access, setbacks, foundation, utilities

Basement or garage conversion

Ceiling height, egress, moisture, structure

Homeowner value
Detached / modular ADU

More privacy and rental appeal

Basement or garage conversion

Often less exterior site work

Proposal gate
Detached / modular ADU

Buildability and crane/access review

Basement or garage conversion

Code, life-safety, and habitability review

Gallery

Each media card is wired to a real service asset; provider-specific pages should use verified project photos or approved visualizer after-photos.

Provider reviewing ADU floor plans with homeownersService photoADU design meeting
ADU consultation media.
Compact ADU interior with kitchenette and heat pumpService photoADU interior
ADU interior media.
Visualizer after-photo showing a detached ADU in a backyardService photoADU visualizer after-photo
Visualizer media for homeowner-specific ADU review.
Search intent

Long-tail questions this page should answer.

These questions keep the page grounded in real homeowner language while the CTA remains provider-facing.

How Much Does An ADU CostADU Rental IncomeDo I Qualify For An ADULocal Housing Agency ADU Loan
FAQ

Common questions about ADU builder.

Clear, standalone answers help homeowners qualify the project before they talk with a provider.

How much does an ADU cost?

ADU cost depends on the unit type, size, access, utilities, structure, finishes, permitting, and provider pricebook. PORTREX pages should use a custom quote CTA instead of public provider prices.

Do I qualify for an ADU?

ADU qualification depends on property type, lot constraints, zoning, egress, utilities, parking rules, and local permitting. A PORTREX buildability screen is preliminary and must be verified by the municipality and licensed provider.

Can an ADU create rental income?

An ADU can create rental income when local rules, lease terms, unit layout, and market demand support it. Rent estimates should be presented as preliminary screening and verified with current local rental data.

What financing can support an ADU?

ADU financing can include home-equity products, renovation loans, state or local housing programs, and provider financing. Eligibility and terms must be verified for the homeowner's address and lender.

Is a prefab ADU faster than a site-built ADU?

A prefab ADU can reduce on-site construction time when the lot supports delivery, crane access, foundation work, and utility tie-ins. Permitting and site preparation still control the final timeline.

Can I convert my garage or basement into an ADU?

A garage or basement can become an ADU only if it can meet habitability, egress, fire safety, structural, utility, and local zoning requirements. A licensed inspection is required before final scope.

Related services

Internal links use descriptive service anchors so each page supports the rest of the catalog.

Heat Pump Installation

Connect mini-splits, cold-climate heat pumps, ADU comfort, local incentive checks, electrical readiness, and financing.

View Heat Pumps

Electrician

Screen panels, rewiring, EV charging, lighting, generators, smart panels, and electrification appliances.

View Electrical

Basement Remodeling

Package basement finishes, interior build-outs, additions, and structural upgrades with one proposal flow.

View Remodeling & Conversions
Proof strategy

Proof requirements before a provider page goes live.

No unverified ratings or testimonials are shown. The page reserves space for real proof, but publishing should wait until provider-specific evidence is attached.

Credential evidence

License, certification, insurance, service-area, and years-in-business fields should be verified before a provider publishes this page.

Provider account proof

Project evidence

Provider-approved ADU & Modular Homes photos, inspection notes, and completed-project evidence should be attached before this page is published for a specific provider.

Photo and scope proof

Outcome evidence

Reviews, measured savings, financing outcomes, or incentive approvals should stay attributed to a real provider, project, source, and date.

Customer outcome proof
Conversion system

Turn this page into a working ADU & Modular Homes funnel.

Launch a Pricebook-safe experience with AI-assisted qualification, calculator outputs, media proof, financing guidance, and customer-facing proposal follow-up.

1Score the project
2Show the right options
3Route the bundle
4Capture the proposal path
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Start QualificationModel ROIOpen Financing PathBook Inspection FlowBuild Proposal Flow

Estimates are for preliminary screening only; final pricing, eligibility, financing approval, zoning, and permitting are verified by the appropriate lender, municipality, licensed professional, and provider.