Plumbing has three businesses inside one trade: service calls, residential repair, and commercial new construction. Each has different bid time, different margin structure, different customer mix. Most plumbing software is tuned for one of the three and feels wrong for the other two. BuildCrux is built around the workflows that span all three, with AI estimating that handles fixture-heavy commercial bids in twelve minutes and service-call invoicing that closes on the truck.
BuildCrux is contractor management software with AI estimating verified inside expert reference ranges on commercial work, including a $686K pharma TI that hit the senior-estimator $700K-$850K range. Plumbers use it for fixture-based commercial bids, service-call invoicing, mileage tracking on every truck, and QuickBooks reconciliation that closes the books without a Sunday cleanup.
Why plumbing is hard to run from one tool
Commercial bids take 8 to 18 hours of takeoff
Commercial plumbing bids count fixtures, measure linear feet of pipe by size, identify floor sinks and indirect waste, price gas piping, and add commercial uplift on labor. A 50-sheet drawing set is 12 to 18 hours of focused estimating. Most plumbing GCs decline bids they could win because the takeoff alone is more time than they have.
Service-call billing leaks money
Tech finishes the call, marks it complete in one app, the office types up the invoice in another, prints, mails. Five days lost. Customer forgets they had work done. Re-bills generate friction. Service-call revenue should close on the truck, with the customer's e-signature and a Stripe payment link sent before the tech leaves the driveway.
Mileage logs are written from memory at tax time
A plumber driving 35,000 business miles a year is sitting on $24,500 in mileage deductions at the 2026 IRS rate. Reconstructed logs at tax time get disallowed under audit. Background GPS tracking captures every drive automatically and produces an IRS-ready log with zero manual effort.
Books take Sunday hours to reconcile
Invoices in the contractor app, payments in QuickBooks, sub bills in a separate file. By Sunday evening you have spent four hours moving numbers between systems and you still cannot tell which jobs made money. Two-way QuickBooks sync ends the ritual.
The BuildCrux Method for Plumbers
Accurate Estimating
AI takeoff handles fixture-heavy commercial bids in twelve minutes. Counts plumbing fixtures, measures linear feet of pipe by size, identifies floor sinks and grease management scope, and applies commercial uplift on labor. Service-call estimates work from a tap on the truck.
- AI takeoff on full PDF drawing sets up to 500 MB
- Fixture-based commercial estimating with grease and gas scope
- Service-call quick-quote on mobile in under two minutes
Structured Planning
Phase scheduling for new construction. Service-route scheduling for repair and maintenance. Long-lead items (specialty fixtures, custom valves) flagged at bid time so procurement starts early.
- Phase budgets inherit from estimate quantities
- Service routes optimized for daily dispatch
- Long-lead procurement flags at bid time
Controlled Execution
Mobile-first field UI built for service trucks. Background GPS mileage tracking, photo documentation tagged to projects, daily logs, on-site change-order creation, and Stripe-link invoicing the customer can pay before the tech leaves.
- Background GPS mileage on every truck
- Photo documentation tagged to projects and phases
- Same-day invoicing with Stripe payment links
Change Order Management
Customer adds a fixture mid-job. Tech captures the request on the truck, the CO inherits unit costs from the original estimate, customer e-signs from their phone, and the contract value updates automatically. No more lost CO revenue.
- Three-minute capture-to-send workflow
- CO unit costs inherit from baseline estimate
- Customer e-sign from any device
Financial Visibility
Live margin per job. AR aging surfaced. QuickBooks two-way sync reconciles invoices and payments automatically. Per-truck and per-tech profitability reports tell you which routes earn and which leak.
- Per-job, per-truck, per-tech margin reporting
- AR aging with automated reminders
- QuickBooks two-way sync
Capability snapshot
| Capability | Why it matters for plumbers |
|---|---|
| AI estimating from PDF plans | Commercial bids in 12 minutes instead of 12 hours |
| Fixture-based estimating | Fixture counts and pipe takeoff are your bid baseline |
| Mobile-first field UI | Trucks, not desks |
| Background GPS mileage | $24K+ in IRS-ready deductions per truck per year |
| Stripe payment processing | Customer pays from the driveway, not next month |
| Customer portal e-sign | CO and proposal sign-off without printing |
| QuickBooks two-way sync | Books reconcile without Sunday cleanup |
| Per-truck profitability | Know which routes earn, which leak |
Get started with BuildCrux
Built for plumbing service teams and commercial plumbing GCs. 30-day money-back guarantee.
Get StartedService vs commercial: same tool, different workflow
| Workflow | Service / repair | Commercial new construction |
|---|---|---|
| Bid origination | Phone call, on-truck quote | PDF drawing set, AI takeoff |
| Bid time | 5 to 15 minutes | 12 minutes (AI) vs 12+ hours (manual) |
| Estimate format | Quick proposal, fixture list | Line-item with quantities + units |
| Approval | Customer signs on truck | Owner e-signs portal |
| Billing | Invoice + Stripe link before truck leaves | Progress billing per milestone, AIA G702/G703 if required |
| Cash flow | Same-day or 7 days | 14 to 28 days net |
| CO process | Inline addition to invoice | Formal CO with schedule + contract update |
Case study: 12-employee plumbing GC
A 12-employee plumbing GC in San Antonio doing $4M in mixed service and commercial new-construction work. Was running ServiceTitan for service ($600/month) plus a manual estimating spreadsheet for commercial bids. Spent 6 to 10 hours per commercial bid. Won 1 in 5 bids. Switched to BuildCrux Office at $349/month flat (unlimited users).
Six months in: AI estimating cut commercial bid time from 8 hours to 25 minutes average. Bid volume on commercial work tripled. Win rate held at 22% so total commercial wins per quarter went from 3 to 9. Net new annual commercial revenue: ~$580K. Subscription cost dropped from $600/month to $349/month, freeing $3K/year. Service-call billing improved separately because techs now invoice on the truck with Stripe links — average payment time on service work dropped from 18 days to 4 days.
Why plumbers choose BuildCrux
BuildCrux is the only contractor management platform that works equally well on a service truck and on a commercial bid. AI estimating handles the fixture-heavy commercial work other tools cannot. Mobile-first field UI handles the service-call workflow other tools treat as an afterthought. QuickBooks two-way sync closes the books. Pricing starts at $39/month for solo and $149/month for crews, no per-user scaling.
BuildCrux Feature
AI Blueprint Estimates — Multi-Pass Pipeline
Senior-estimator output, every time, in twelve minutes
Learn moreBuildCrux Feature
Mileage Tracking for Contractors
Log every mile and maximize deductions
Learn moreFrequently asked questions
Does BuildCrux work for service plumbers?+
Yes. Mobile-first field UI lets techs quote, invoice, and collect Stripe payments from the truck. Background mileage tracking runs automatically. Customer portal lets homeowners pay or sign from their phone.
Does BuildCrux handle commercial plumbing estimating?+
Yes. AI takeoff reads full PDF drawing sets up to 500 MB and produces fixture-based commercial estimates in twelve minutes. Verified output includes a $686K pharma TI inside the senior-estimator $700K-$850K reference range.
Is BuildCrux a ServiceTitan alternative?+
For mixed-service-and-commercial plumbing GCs, yes — and it costs roughly half as much at the comparable tier. ServiceTitan goes deeper on pure-service workflows (dispatch optimization, service contracts) but is overkill and expensive for plumbing GCs whose business is half commercial.
Can I track mileage automatically?+
Yes. Background GPS tracking on iOS and Android logs every drive automatically with start, end, route polyline, distance, and project tag. IRS-ready CSV export at tax time. At 35,000 business miles per year, that is roughly $24,500 in 2026 deductions captured per truck.
Does BuildCrux integrate with QuickBooks?+
Yes, two-way sync. Invoices push to QB on send. Payment reconciliation pulls back automatically when QB matches deposits. Sub bills sync both directions. Most plumbing GCs cut their weekly QB cleanup time by 90% in the first month.
How much does BuildCrux cost for a plumbing crew?+
Solo: $39/month. Crew (small team): $149/month flat, unlimited users. Office (mid-size GC): $349/month flat. No per-user fees. 30-day money-back guarantee.
The bottom line
Plumbing is service plus commercial plus repair, all in one trade. Software that only handles one of the three forces you to maintain three stacks. BuildCrux handles all three at flat-tier pricing without per-user fees, with AI estimating commercial bids your competitors cannot match. Try it free.
