Building Construction Scope: How I Shipped a Vertical SaaS for Contractors
I build digital products for a living. Construction Scope is the one I built for an industry that runs on text threads, paper estimates, and spreadsheets that break the moment a job gets complicated. Here is how it came together — and what I would tell anyone shipping a vertical SaaS.
The problem worth solving
Small construction businesses lose hours every week to work that has nothing to do with building. An owner takes a call, scribbles details, rebuilds an estimate in a spreadsheet, texts it over, chases an approval, forgets a change order, and then tries to reconstruct what was actually agreed when it is time to invoice. Money slips through the cracks at every handoff.
That is not a software-category problem ("they need a CRM"). It is a specific, describable workflow: first call to final payment. Naming the problem that narrowly is what made the product buildable by one person.
The decisions that shaped v1
Pick one painful workflow
Not "construction software" in the abstract — the specific path from first call to final payment. Everything else was scope I deliberately cut for v1.
Plain-English job statuses
Lead, Approved, Scheduled, Ready to bill. Contractors do not want a Gantt chart; they want to know what each job needs next.
Mobile approval over email threads
Estimates and change orders are sent as a link the customer signs on their phone. The approval is the record — no chasing.
One source of truth for money
Deposits, progress payments, and balances live on the job, not in a separate accounting silo, with QuickBooks export for the books.
The core loop: estimate → approval → invoice
Everything in Construction Scope orbits one loop. A job starts as a lead, becomes an itemized estimate, gets approved by the customer from their phone, picks up change orders as scope shifts, and converts directly into an invoice with automatic payment reminders. No re-keying, no "which version did we agree on," no separate tool for each step.
Getting that loop to feel effortless was 80% of the work and 100% of the value. I wrote more about the specific design choices in designing an estimate-to-invoice flow contractors actually use.
What I would do the same
Vertical beats horizontal for a solo founder
A generic CRM has a thousand competitors. "Billing for small contractors" is a narrow, describable buyer with a concrete pain — far easier to build for and market to.
The boring flow is the product
Estimate to approval to invoice is unglamorous. It is also the entire reason a contractor pays monthly. Flashy features did not move trials; finishing that loop did.
Ship the smallest useful version
v1 launched without reporting dashboards and crew permissions. Real usage told me what to build next far better than my roadmap guesses did.
What I would do differently
I spent too long polishing screens before putting them in front of real contractors. The features that mattered — faster approvals, clearer balances — only became obvious once people used it on actual jobs. If I started again, I would get the rough estimate-to-invoice loop into a few real businesses in week two, not week eight.
The other lesson: pricing is positioning. Pricing Construction Scope in clear tiers ($49 solo, $99 crew, $249 pro) did more to qualify the right buyers than any feature I shipped. Vague "contact us" pricing would have wasted everyone's time.
If you are building something similar
Pick a workflow you can describe in one sentence. Build the smallest version that completes it end to end. Put it in front of real users before it is pretty. And price it clearly so the market tells you fast whether you picked the right problem.
See the product
Construction Scope runs every job from first call to final payment — customers, jobs, estimates, change orders, invoices, and payments in one place, built for small construction businesses.
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