Compare · 6 min read

PlanSnapper vs ArcSite: Which Tool Is Right for Floor Plan Measurement?

ArcSite and PlanSnapper both deal with floor plans and square footage — but they operate at completely different stages of the workflow. ArcSite is a mobile app for drawing plans in the field. PlanSnapper is a browser-based tool for measuring and calculating GLA from plans that already exist. Understanding that distinction will tell you exactly which one (or both) belongs in your process.

The core difference

ArcSite is field sketching software. You walk a property, take measurements with a laser or tape, and sketch the floor plan in real time on your tablet or phone. ArcSite is popular with contractors, inspectors, and appraisers who draw their own floor plans on-site. It produces a finished floor plan drawing you can export and share.

PlanSnapper is a measurement calculator for existing floor plans. Upload a floor plan image or PDF — from ArcSite, CubiCasa, Matterport, an architect, or the MLS — set one known wall length as your scale reference, trace the exterior perimeter, and get a ANSI Z765-2021 compliant GLA calculation in under 60 seconds. No drawing required.

PlanSnapper vs ArcSite: at a glance

When PlanSnapper wins

• You have a floor plan from CubiCasa, Matterport, iGUIDE, an architect, or a prior appraisal and need to verify or calculate GLA fast
• You are reviewing another appraiser's square footage and want an independent check
• You don't need to draw a new floor plan — just measure one that exists
• You want a tool with zero install and a five-minute learning curve
• You need ANSI Z765 compliant GLA with above-grade and below-grade areas treated separately
• You do desktop appraisals or hybrid appraisals and never visit the property yourself

When ArcSite wins

• You take your own measurements on-site and need to sketch the floor plan from scratch
• You are a contractor or inspector who produces floor plan drawings as a deliverable
• You need CAD-style features: layers, symbols, annotations, and dimensional callouts
• Your workflow requires a polished field sketch that goes directly to a client or report
• You use a laser distance meter (Disto, Leica) and want Bluetooth integration for auto-entry

Can appraisers use both?

Yes — and some do. Here is a common combined workflow: use ArcSite on-site to sketch the floor plan and export a PDF. Back at the desk, upload that PDF to PlanSnapper to verify the GLA calculation and produce ANSI-compliant above-grade and below-grade area breakdowns. ArcSite handles the capture; PlanSnapper handles the compliance check.

That said, most appraisers who use PlanSnapper don't use ArcSite at all — they already have floor plans from 3D scanning services, architects, or builders, and just need to measure them accurately. ArcSite solves the problem of creating a floor plan; PlanSnapper solves the problem of measuring one.

What about accuracy?

ArcSite's accuracy depends entirely on the measurements you enter. If you measure with a laser and enter dimensions carefully, the resulting plan is highly accurate. If you rough-sketch by eye, the plan will reflect that.

PlanSnapper's accuracy depends on the quality of the source floor plan. On professionally-produced, to-scale plans (CubiCasa, Matterport, architect drawings), users consistently match licensed appraiser measurements within 1–2%. The tool uses a single known wall length as a scale reference, so accuracy scales with source plan quality.

The bottom line

ArcSite is a field tool. PlanSnapper is a measurement tool for existing plans. If you are on-site drawing a floor plan, ArcSite is the right product. If you have a floor plan and need GLA — verified, ANSI-compliant, in under 60 seconds — PlanSnapper is the faster and simpler choice.

For appraisers doing hybrid or desktop work, or anyone who receives floor plans from other sources and needs a reliable GLA calculation, PlanSnapper is the more direct solution at a lower price point.