roundup

Best Software for ADU Contractors (2026): 5 Tools for Garage Conversions, Detached ADUs, and $100K-$500K Project Management

The 5 best software tools for ADU (Accessory Dwelling Unit) contractors and garage conversion specialists in 2026. Compared on price, jurisdiction-specific permit tracking, multi-trade scheduling, change order workflow, draw schedules, and customer selections for $100,000-$500,000+ ADU projects.

By TradeSoftGuide Editorial ·

If you build ADUs — detached new-build backyard cottages, garage conversions, basement conversions (JADUs in California), above-garage ADUs, attached additions that create a secondary dwelling unit — and your “project management” is a paper contract, a spreadsheet of subs, and a group text with the homeowner, you’re leaving rental income on the table for the homeowner AND margin on the table for yourself.

ADUs (also called granny flats, in-law suites, secondary dwelling units, laneway houses in Vancouver, DADUs in Seattle) are the fastest-growing residential construction category in California, Oregon, Washington, Massachusetts, and most major U.S. metros as housing costs push homeowners to add rental units. Every project is multi-trade coordination (foundation, framing, electrical, plumbing, HVAC, drywall, roofing, finish, often a full kitchen and bath — typically 8-12 trades on a single job), permit and inspection-heavy (separate ADU permits in most jurisdictions, multiple inspections at foundation/friable/framing/rough-in/insulation/final, separate utility meters in many cities, sometimes separate addresses), regulatory-complex (setback and height limits, lot coverage maximums, parking waivers, owner-occupancy rules that vary by city, impact fees, utility connection fees, design review in some historic districts), change-order-heavy (the homeowner adds a deck, upgrades finishes, expands the ADU mid-project, adds a separate entrance, converts a window to a door — every ADU has 6-15 change orders), long-timeline (a typical detached ADU is 4-9 months from permit to final, a garage conversion is 2-4 months, JADUs are 1-3 months), and selection-driven with significant allowances (kitchen $8,000-$25,000, bath $5,000-$15,000, flooring $3,000-$10,000, fixtures, lighting, tile, windows, doors, siding — 20-60+ selections).

The right software handles these patterns: project scheduling across 8-12 trades, jurisdiction-specific permit tracking, change order workflow with e-signature, customer selection sheets with allowance tracking, draw schedules and progress billing for $100K-$500K projects, and a customer-facing portal where the homeowner can approve selections, sign change orders, see progress photos, and check the project schedule.

The wrong software is a generic field service tool that thinks a $300,000 detached ADU is just a really big service call, with no concept of multi-trade coordination, jurisdiction-specific ADU regulations, or change orders.

This guide compares the 5 best software tools for ADU contractors in 2026, ranked by what matters most for ADU specialists and garage conversion contractors: project management depth, multi-trade scheduling, permit/inspection tracking, change order handling, and overall fit for $100K-$500K ADU projects.

Short answer: Jobber is the best starting point for solo ADU contractors and small ADU shops (1-5 person) doing garage conversions and smaller detached ADUs under $200,000 because its quote builder handles structural and finish line items cleanly, change orders are easy to issue, and customer communication is built in. Buildertrend is the industry standard for residential ADU specialists running 5+ concurrent projects because it handles project scheduling, draw schedules, change orders, customer selections, and allowance tracking all in one tool. CoConstruct is the alternative if customer collaboration and selection tracking are your #1 priority. ServiceTitan is the right call for design-build ADU companies with in-house design staff and 5+ project managers.

👉 Try Jobber free for 14 days → (no credit card required)

What to look for in ADU contractor software

ADU construction is structurally and regulatorily distinct from generic remodeling. Before comparing tools, here’s what separates ADU-friendly software from generic FSM:

1. Jurisdiction-specific permit and inspection tracking. ADUs are the most jurisdictionally-regulated residential project type. California has AB 68, SB 9, and state-level ADU streamlining acts that pre-empt local zoning — but every city still has its own implementation. San Diego allows JADUs, Los Angeles has separate ADU and JADU pathways, San Francisco requires separate addresses, San Jose has different setback rules than Sacramento. Oregon (House Bill 2001 / 2003) and Washington (HB 1110 in 2023) have their own state-level ADU rules. The right software tracks permit status by jurisdiction, scheduled inspection dates (typically 4-8 inspections: foundation, framing, rough plumbing, rough electrical, rough HVAC, insulation, drywall sometimes, final), and reminds you when inspections are due. A failed foundation inspection on a $350,000 detached ADU can delay the project 2-4 weeks and cost $5,000-$15,000 in carrying costs.

2. Multi-trade project scheduling across 8-12 trades. A typical detached ADU has 80-200 tasks across 8-12 different trades: excavation, foundation (often slab-on-grade, sometimes raised foundation matching the main house), framing, rough plumbing (kitchen, bath, sometimes laundry), rough electrical (separate panel often required, separate meter in some cities), rough HVAC (mini-split most common, sometimes central), roofing (matching existing house or new), siding, window/door install, insulation, drywall, painting, flooring, tile, trim, kitchen install, bath install, final punch list. The right software visualizes the schedule, shows dependencies, and flags tasks that are behind. When a structural inspection fails or a window is backordered 6 weeks, the whole schedule shifts and you need to see the impact immediately.

3. Change order workflow with cost and schedule impact. Every ADU has 6-15 change orders. The homeowner wants to upgrade the kitchen from laminate to quartz, expand the ADU from 600 to 750 sq ft, add a separate entrance, add a deck, convert a window to a sliding door, upgrade to a tiled shower, add a tankless water heater, add solar, add EV charging in the main house electrical. The right software creates a change order with the cost and schedule impact, sends it to the homeowner for e-signature, and updates the contract total and project schedule automatically. For a $300,000 ADU, capturing 10-12 change orders cleanly adds $20,000-$50,000 of additional revenue that would otherwise be haggled over after the fact.

4. Customer selections and large allowance tracking. A typical ADU has 20-60+ selections: kitchen cabinets and countertops ($8,000-$25,000), bath fixtures and tile ($5,000-$15,000), flooring ($3,000-$10,000), paint, plumbing fixtures, lighting, hardware, tile, doors, windows, siding (often required to match the main house), roofing, appliances. The right software has selection sheets where the homeowner makes choices, compares allowance vs. actual cost, and flags when they’re going over allowance BEFORE they commit. The over-allowance conversation is the #1 source of customer friction in ADU work.

5. Draw schedules and progress billing for $100K-$500K projects. A $300,000 ADU isn’t paid upfront. The contractor bills in draws: 10% at contract signing, 15% at foundation complete, 20% at framing/weathertight, 20% at rough-in complete, 15% at drywall, 15% at finishes, 5% retention. For financed projects (most ADU owners finance via cash-out refi, HELOC, or ADU-specific construction loans), the lender releases funds in draws tied to inspections. The right software handles scheduled draws automatically, sends invoices when due, and tracks what’s outstanding. For a $100K-$500K project, draw billing is the difference between running the project on your own cash flow or the homeowner’s.

6. Subcontractor coordination across 8-12 trades. Most ADU contractors are GCs and don’t do all the work themselves. They sub out excavation, foundation, framing, plumbing, electrical, HVAC, roofing, sometimes drywall, paint, flooring, and tile. The right software tracks sub contact info, insurance certificates, licenses, scheduled work, and payments. Bonus if it lets subs update their task status from the field.

7. ADU-specific documentation and Title 24 / energy code compliance. California ADUs must meet Title 24 energy code, which has different requirements than the main house in some cases (some jurisdictions exempt ADUs under 750 sq ft from solar requirements, others don’t). The right software stores plan sets, energy calculations, structural engineering, and compliance documentation by project. For Oregon, Washington, and other states, similar energy code documentation applies.

8. Photo and document management. ADUs generate hundreds of photos: before photos, demo photos (for garage conversions especially), excavation photos, foundation photos, framing photos, sheathing photos, rough-in photos, insulation photos, drywall photos, finish photos, and final photos. The right software stores these by project and makes them easy to find when there’s a warranty claim (a window leaks 18 months later — which window, which flashing detail, which install?).

9. Customer-facing portal. ADU homeowners are usually highly engaged — they’re investing $100K-$500K to add a rental unit, house aging parents, or create multigenerational space. They want to know “what’s happening today?”, “what do I need to decide this week?”, “is the project still on track?”, and “where are we on the budget?” A customer-facing portal where they can see photos, approve selections, sign change orders, check the schedule, and see the running total of selections vs. allowances reduces “where are we?” calls by 50%+. This is the #1 stress-reduction feature for both you and the homeowner on a 4-9 month project.

10. Separate utility and address tracking. Many jurisdictions require ADUs to have separate utility meters, separate addresses, and sometimes separate mailing addresses. The right software tracks this as part of the project — separate utility account setup, separate address issuance, separate mail/POD access for the ADU.

The 5 best software tools for ADU contractors

1. Jobber — Best entry point for solo and small ADU contractors (1-5 person)

Starting price: $49/mo (Lite, annual) — most ADU contractors need Core ($99/mo) or Connect ($199/mo) for the full feature set Best for: Solo ADU contractors and small ADU shops (1-5 person) doing garage conversions, JADUs, and smaller detached ADUs under $200,000 Why it wins: Jobber’s quote builder handles the structural and finish line items in an ADU cleanly — foundation, framing, rough-in, finishes, fixtures, appliances — and the change order workflow is the easiest in this category to issue from the field. The customer communication is built in (texting, email, automated reminders) which matters for ADU homeowners who are highly engaged and want frequent updates.

Strengths:

  • Quote builder handles ADU line items cleanly (structural + finish in one quote)
  • Change orders are easy to issue with e-signature
  • Customer communication (texting, email) is built in
  • QuickBooks Online integration is two-way
  • Mobile app is solid for techs in the field
  • Job costing reports show profit per ADU project
  • Lower price point — important for solo ADU contractors

Weaknesses:

  • No purpose-built project scheduling (you’ll use a separate Gantt tool for complex multi-trade projects)
  • No purpose-built customer selection sheets (you’ll use a Google Doc or spreadsheet for ADU selections)
  • No purpose-built draw schedules (you’ll manually schedule draw invoices)
  • Annual plan is cheaper but locks you in

Verdict for ADU contractors: If you’re a solo ADU contractor or running a small shop (1-5 person) doing garage conversions, JADUs, and smaller detached ADUs under $200,000, Jobber is the right starting point. The price is the lowest in this category, the quote builder handles ADU line items well, and the customer communication tools are built in. For multi-trade project scheduling, customer selection sheets, and draw schedules, you’ll need to add a separate tool or upgrade to Buildertrend.

👉 Try Jobber free for 14 days →

2. Buildertrend — Best for ADU specialists running 5+ concurrent projects

Starting price: ~$375/mo (Pro) — most ADU specialists need the Premium or Enterprise tier Best for: Residential ADU specialists running 5+ concurrent projects at $200,000+ per ADU Why it’s a contender: Buildertrend is the industry standard for residential construction project management. The project scheduling, draw schedules, change orders, customer selections, allowance tracking, and customer-facing portal are all purpose-built for residential projects — which is exactly what ADU construction is. For an ADU specialist running 5+ concurrent $200K+ projects, the project management depth pays for itself in 1-2 jobs per year.

Strengths:

  • Purpose-built project scheduling with Gantt charts and dependencies
  • Draw schedules with progress billing built in
  • Customer selection sheets with allowance tracking and over-allowance alerts
  • Change orders with cost and schedule impact
  • Customer-facing portal where homeowners approve selections and see photos
  • Subcontractor coordination with insurance certificate tracking
  • Photo and document management by project
  • Permit and inspection tracking with reminders

Weaknesses:

  • Expensive ($375+/mo) — overkill for solo ADU contractors doing 1-2 concurrent projects
  • Steep learning curve (1-2 weeks of training)
  • Mobile app is functional but not best-in-class
  • Customer support can be slow during peak season

Verdict for ADU contractors: If you’re an ADU specialist running 5+ concurrent projects at $200,000+ per ADU, Buildertrend is the right tool. The selection tracking, allowance alerts, permit tracking, and customer-facing portal will save you hours per week and protect your margin on kitchen and bath allowances. For solo or small ADU operations, it’s too much tool and too much money.

👉 Try Jobber free for 14 days → (if you’re not yet at the 5+ project scale)

3. Housecall Pro — Best for fast-moving ADU shops prioritizing speed

Starting price: $65/mo (Essentials) — most ADU shops need Max ($165/mo) or higher Best for: ADU shops where speed of customer communication and on-site payment are the #1 priority Why it’s a contender: Housecall Pro’s mobile app is the fastest in this category, and the two-way texting + “on my way” texts are best-in-class. For ADU contractors running a high volume of garage conversions and JADUs (faster-cycle projects), the speed difference between Housecall Pro and Jobber is real. Garage conversions and JADUs typically run 1-4 months, and the customer wants constant updates during the build.

Strengths:

  • Fastest mobile app in this category
  • Best-in-class two-way texting and customer communication
  • Built-in payment processing (no separate Stripe/Square account needed)
  • Automated appointment reminders and “on my way” texts
  • “Today” view shows everything a tech needs for the day on one screen
  • Lower price than Buildertrend or ServiceTitan

Weaknesses:

  • No purpose-built project scheduling for multi-trade projects
  • No purpose-built customer selection sheets
  • No purpose-built draw schedules
  • Annual plan is cheaper but locks you in

Verdict for ADU contractors: If you’re running a high-volume ADU shop doing garage conversions and JADUs where speed of customer communication matters more than project management depth, Housecall Pro is a strong alternative to Jobber. For multi-trade project scheduling, customer selection sheets, and draw schedules, you’ll need to add a separate tool.

4. ServiceTitan — Best for design-build ADU companies with 5+ project managers

Starting price: ~$1,000-3,000+/mo (Essentials tier and up) — enterprise pricing Best for: Design-build ADU companies with in-house design staff, architectural relationships, and 5+ project managers running 20+ concurrent ADU projects Why it’s a contender: ServiceTitan’s phased job costing tracks ADU projects as project phases (design, permit, foundation, framing, rough-in, finishes, final) with budget vs. actual at each phase. For large ADU operations running 20+ concurrent projects, this level of financial visibility is essential. ServiceTitan also has the strongest customer communication and dispatching of any tool in this category.

Strengths:

  • Phased job costing with budget vs. actual at each ADU phase
  • Strong customer communication and dispatching
  • Membership management (less relevant for ADU, more for service)
  • QuickBooks integration
  • Excellent reporting and dashboards
  • Strong mobile app for field project managers

Weaknesses:

  • Very expensive ($1,000-3,000+/mo)
  • Overkill for solo and small ADU contractors
  • Steep learning curve (2-4 weeks of training)
  • Sales-led onboarding (expect a 4-6 week implementation timeline)
  • Less purpose-built for residential ADU than Buildertrend or CoConstruct

Verdict for ADU contractors: If you’re running a design-build ADU company with 5+ project managers and 20+ concurrent ADU projects, ServiceTitan is worth the conversation. Yes, it’s expensive. For an ADU operation doing $5M+ in annual revenue, the phased job costing and reporting pay for the tool. For smaller ADU operations, Jobber or Buildertrend is a better fit.

5. JobProgress — Best for ADU contractors wanting a middle ground

Starting price: ~$230/mo (Pro) — most ADU contractors need the Business or Enterprise tier Best for: ADU contractors wanting project management depth at a lower price than Buildertrend Why it’s a contender: JobProgress sits between Jobber (basic) and Buildertrend (full project management) — it has project scheduling, change orders, and customer communication but at a lower price point than Buildertrend. For ADU contractors who have outgrown Jobber but don’t want to pay for Buildertrend, it’s worth a look.

Strengths:

  • Project scheduling with dependencies
  • Change orders with e-signature
  • Customer communication built in
  • Lower price than Buildertrend
  • Good mobile app

Weaknesses:

  • Less purpose-built for residential construction than Buildertrend
  • Customer selection sheets are basic (no allowance tracking)
  • Draw schedules require manual setup
  • Smaller user community than Jobber or Buildertrend

Verdict for ADU contractors: If you’ve outgrown Jobber but aren’t ready to pay for Buildertrend, JobProgress is the middle ground. For most ADU specialists running 5+ concurrent projects, Buildertrend is the better long-term choice.

Decision framework: which ADU software is right for you?

Solo ADU contractor or small shop (1-5 person) doing garage conversions, JADUs, and small detached ADUs under $200,000: Jobber is the right starting point. The price is the lowest, the quote builder handles ADU line items cleanly, and the customer communication tools are built in. You’ll add a separate Gantt tool for complex multi-trade scheduling and a Google Doc for customer selections.

ADU specialist running 5+ concurrent projects at $200,000+ per ADU: Buildertrend is the right tool. The project scheduling, draw schedules, customer selection sheets with allowance tracking, change orders, and customer-facing portal are purpose-built for exactly what you do. The price ($375+/mo) is justified by the time savings and margin protection.

ADU shop prioritizing speed of customer communication and on-site payment: Housecall Pro is the right call. The mobile app is the fastest, the two-way texting is best-in-class, and the built-in payment processing removes a step.

Design-build ADU company with in-house design staff and 5+ project managers: ServiceTitan is the right tool. The phased job costing tracks ADU projects as project phases with budget vs. actual, and the reporting is best-in-class for an ADU operation doing $5M+ in annual revenue.

ADU contractor wanting project management depth at a lower price than Buildertrend: JobProgress is the middle ground. For most ADU specialists running 5+ concurrent projects, Buildertrend is the better long-term choice, but JobProgress is worth a look if budget is the primary constraint.

ADU contractor with highly collaborative homeowners and complex finish selections: CoConstruct is the right tool. The customer selection workflow is the most polished in this category, and the customer-facing portal is the best for homeowners who want to be deeply involved in the design and finish decisions.

Common ADU contractor software questions

How much does ADU contractor software cost?

For a solo ADU contractor: $50-100/month. For a 3-5 person ADU shop: $100-400/month. For ADU specialists running 5+ concurrent projects, Buildertrend starts at $375/month. For large ADU companies with 5+ project managers, ServiceTitan starts at $1,000-3,000+/month.

How do ADU contractors handle California Title 24 energy code compliance?

For California ADUs, Title 24 energy compliance is required for every project. Most ADU contractors work with an energy consultant or HERS rater who provides the Title 24 documentation. The right software stores these documents by project — Jobber handles this via attached files and custom fields, Buildertrend has a purpose-built document storage module. For ADUs under 750 sq ft in some California jurisdictions, solar requirements are exempted, but the rules vary by city and change frequently.

How do ADU contractors handle separate utility meters and addresses?

Many jurisdictions require ADUs to have separate utility meters (water, electric, sometimes gas) and separate addresses. The right software tracks this as part of the project — separate utility account setup, separate address issuance, separate mail/POD access for the ADU. Jobber handles this via custom fields and tasks; Buildertrend has it as a standard project field.

Is Buildertrend worth the cost for ADU contractors?

If you’re running 5+ concurrent ADU projects at $200,000+ per ADU, yes. The customer-facing portal alone will save you 5-10 hours per week in “where are we?” calls and emails, and the selection tracking will protect your margin on kitchen and bath allowances. For solo and small ADU contractors doing fewer concurrent projects, Jobber is a better fit at one-fifth the price.

What about software for design-build ADU operations?

Design-build ADU contractors with in-house design staff, architectural relationships, or structural engineers need software that handles both the design/sales side (plan markups, structural options, finish selections) and the production side (project management, change orders, draw billing). CoConstruct is the best in this category for design-led ADU operations. Buildertrend is the alternative if your design work is more light-touch. Jobber is the right fit if you’re a solo ADU contractor with limited design involvement.

Can I switch ADU software later?

Yes, but it’s annoying. All major tools support data export. Budget 1-2 weeks for migration and re-training (longer for ServiceTitan or CoConstruct due to complexity). Most ADU contractors who switch do it because they’ve outgrown the first tool, not because they picked wrong.

The bottom line

For most solo and small ADU contractors, Jobber is the right starting point. The quote builder handles the structural and finish line items in an ADU cleanly, change orders are easy to issue, and the customer communication is built in. The price ($49-99/mo) is the lowest in this category. Try the 14-day free trial — no credit card required, and you’ll know within a week if it’s the right fit.

For ADU specialists running 5+ concurrent projects at $200,000+ per ADU, Buildertrend is the right tool. The selection tracking, allowance alerts, permit tracking, and customer-facing portal will save you hours per week and protect your margin on kitchen and bath allowances.

For design-build ADU contractors with in-house design staff, structural engineers, and a showroom or design center, CoConstruct is the alternative. For large ADU companies with 5+ project managers and 20+ concurrent projects, ServiceTitan is worth the conversation.

👉 Try Jobber free for 14 days → — no credit card required 👉 See ServiceTitan for ADU contractors → — partner referral, ServiceTitan’s team will walk you through design-build ADU workflows