Build standard
How we design an honest preliminary estimate funnel.
The calculator is not a guess dressed up as software. It is a documented set of client-approved rules, visible uncertainty, a deliberate contact handoff, and a tested customer interface.
Define the decision
We first decide what the result is allowed to mean: usually a planning range that helps a homeowner decide whether to continue. It is never labeled a contract, guaranteed price, or substitute for inspection.
The client identifies the service, service area, minimum project, obvious exclusions, and the sales action that should follow a qualified result.
Map the pricing logic
Every input must have a job. It can change the range, screen fit, expose uncertainty, or improve the sales summary. Fields that do none of those things are removed.
We document base units, modifiers, minimums, exceptions, and the range spread. The contractor supplies or approves the numbers because local pricing and operational constraints belong to the contractor.
Design for uncertainty
Unknown conditions do not disappear because a calculator exists. We use ranges, assumptions, exception paths, and visible warnings to keep the output proportionate to what the visitor actually supplied.
If an answer creates too much uncertainty, the safer outcome is “needs review,” not a forced number.
Build the consented handoff
The visitor can see a useful planning result before choosing whether to continue. Contact details are not silently captured by the public prototype.
For production, the agreed project summary is sent to one existing workflow. Privacy language, retention, access, and the client’s own legal obligations must match the real implementation.
Verify the customer path
Testing covers the calculation branches, minimums, reset behavior, dialog states, invalid and boundary inputs, keyboard use, mobile layouts, horizontal overflow, resource failures, and browser-console errors.
Before launch, the client reviews representative scenarios against its own expectations. A passing interface test does not replace business-rule approval.
Launch with an update path
The handoff records what was built, which rules were approved, what remains outside scope, and how future pricing changes can be requested. The client keeps final quote control.
After launch, useful evidence is completed estimators, qualified conversations, accepted projects, and sales-team feedback. We do not promise traffic, leads, revenue, rankings, quote accuracy, or return on investment.
Current public prototype
What has already been tested.
- Fence, floor-coating, and artificial-turf calculation flows.
- All custom dropdowns at desktop and mobile sizes.
- Keyboard operation, number stepping, reset, and lead-preview states.
- Responsive width, resource loading, and browser-console output.
- Security headers, crawl controls, canonical URLs, and metadata.
Evaluate it yourself
Open the prototype and test the assumptions.
The demo is illustrative and stores or submits no inputs. Its purpose is to make the customer path concrete before any client-specific build begins.