How does iGUIDE measure square footage?

iGUIDE uses a proprietary camera system with LiDAR and a 360 degree camera to capture room geometry. Algorithms process the captured data to generate floor plans and calculate square footage. The system is designed for real estate use and produces results similar to manual measurement.

Is iGUIDE square footage accurate enough for appraisals?

iGUIDE produces highly accurate floor plans (within 1% in most conditions), but like other scan-based systems, it does not automatically apply ANSI Z765 methodology. Appraisers must verify that above-grade, finished, heated space is correctly identified before relying on iGUIDE data for GLA.

How does iGUIDE compare to Matterport for floor plan measurement?

Both systems use LiDAR-based measurement and produce floor plans with comparable accuracy. iGUIDE emphasizes floor plan output and square footage data, while Matterport is better known for 3D virtual tour presentation. For floor plan measurement specifically, iGUIDE is often preferred by appraisers for its data export options.

Can an iGUIDE floor plan be used to calculate GLA for an appraisal?

iGUIDE floor plans can support GLA calculation, but the appraiser must verify that the data conforms to ANSI Z765 — above-grade, finished, heated space only. iGUIDE measures all interior space by default. The appraiser needs to confirm exclusions (garage, basement, covered porch) are properly handled before using the figure on a report.

What do you do with an iGUIDE floor plan after the scan?

Upload the iGUIDE PDF floor plan to a tool like PlanSnapper to trace the above-grade living areas and calculate GLA. This lets you cross-check the iGUIDE system's square footage against a manual trace, confirm exclusions are correct, and produce an ANSI-compliant figure suitable for the appraisal report.

How much does iGUIDE cost per scan?

iGUIDE pricing varies by market and provider, but typical scans for a residential home run between $100 and $250, depending on home size and the photographer's pricing. This is comparable to Matterport but generally includes floor plan delivery as standard output. Photographers set their own pricing, so rates differ regionally.

Does iGUIDE automatically produce ANSI-compliant square footage?

iGUIDE produces highly accurate floor plans but does not automatically apply ANSI Z765 GLA rules. The system measures all enclosed space — including garages and below-grade areas. An appraiser or reviewer must identify and exclude non-GLA areas from the total to produce a compliant figure. Uploading the iGUIDE floor plan to PlanSnapper lets you trace only the qualifying GLA areas.

Is iGUIDE square footage accepted by appraisers?

iGUIDE produces ANSI Z765-compliant measurements using calibrated 3D scanning technology, so appraisers can use iGUIDE data as a reference. However, many lenders and appraisal guidelines still require the appraiser to independently verify measurements from exterior dimensions. The iGUIDE report can be a useful cross-reference, but it typically does not replace the appraiser's own sketch.

How does iGUIDE measure square footage differently from a traditional appraiser sketch?

iGUIDE uses a rotating LiDAR scanner mounted on a tripod to capture interior measurements in 3D. It calculates GLA by processing interior scan data and applying ANSI Z765 standards algorithmically. Traditional appraiser sketches use exterior tape or laser measurements and manual calculation. iGUIDE tends to be more precise for interior geometry but may differ from exterior-measured GLA by 1-3% depending on wall thickness assumptions.

Learn · Real Estate · 4 min read

Part of: Floor Plan Measurement Tools: The Complete Comparison Guide

How to Get Square Footage from an iGUIDE Floor Plan

iGUIDE produces accurate, to-scale floor plans used across North America, but likeCubiCasa and Matterport, they do not publish total square footage. Here is how to calculate it yourself in under two minutes.

What is iGUIDE

iGUIDE is a Canadian-based real estate technology company that produces 3D virtual tours and 2D floor plans using LiDAR scanning. Their plans are widely used by real estate agents across Canada and increasingly in the United States, particularly in markets where 3D tours have become a listing standard.

iGUIDE floor plans are known for clean line work and consistent wall representation. The scanning process produces accurate, to-scale plans suitable for measurement work.

Why iGUIDE floor plans do not include square footage

Like CubiCasa and Matterport, iGUIDE deliberately omits total square footage from their published floor plans. The reason is liability. Square footage in real estate transactions is a legally sensitive figure. If a floor plan service publishes a number and it differs from what an appraiser measures, it creates disputes and potential legal exposure for the floor plan provider.

By leaving the total out, iGUIDE keeps their plans useful as a reference tool while staying out of the measurement business. The individual room dimensions are there. The exterior perimeter is to scale. The total is left for the user to calculate.

How to calculate square footage from an iGUIDE floor plan

iGUIDE floor plans work well with a floor plan measurement tool like PlanSnapper because they are clean, to-scale, and include room dimensions you can use to set the scale. Here is the process:

Open the iGUIDE tour for the property and navigate to the floor plan view. Take a screenshot or save the floor plan image.
Upload the image to PlanSnapper. The tool will attempt to auto-detect the exterior perimeter using edge detection.
Set the scale by clicking the two endpoints of any wall with a known dimension. iGUIDE plans typically label individual room dimensions, so you will have at least one reference measurement available.
Hit Calculate. PlanSnapper returns total square footage, wall lengths, and perimeter. Add a second polygon for the garage if the plan includes an attached garage.

The full process takes about two minutes on a typical iGUIDE plan. Everything runs in your browser. No data is sent to any server.

iGUIDE vs. CubiCasa vs. Matterport for measurement

Service	Plan Style	Square Footage Shown?	Common Markets
iGUIDE	Clean thin wall lines; low visual noise	No — calculate via PlanSnapper	Canada; growing US presence
CubiCasa	Similar clean style; labeled dimensions	No — calculate via PlanSnapper	US (Bay Area); international
Matterport	More complex — 3D-to-2D projection	No — calculate via PlanSnapper	US luxury listings; 3D tour markets

All three services produce to-scale floor plans that work reliably for perimeter measurement. The main practical difference is the visual style of the plan:

iGUIDE plans have clean, thin wall lines and tend to have less visual noise. Auto-detection works well on most iGUIDE plans.
CubiCasa plans have a similar clean style and are common in San Francisco Bay Area listings. Also work well with auto-detection.
Matterport plans can be slightly more complex due to the 3D-to-2D projection. Auto-detection usually works, and the manual trace tool handles any irregular edges in seconds.

For any plan where auto-detection does not capture the perimeter cleanly, the manual trace tool lets you click along the exterior walls to define the boundary yourself. It takes under a minute for most floor plans.

Who uses this

Appraisers working on listings in Canadian markets or US markets where iGUIDE has become common use this to verify or calculate GLA quickly. The plan is accurate and to-scale, which makes it a reliable data source for measurement. See appraisal sketch requirements for what ANSI Z765 expects from any measurement source.

Real estate agents use it to confirm square footage before listing, and buyers use it to independently verify what is on the listing sheet. On any significant transaction, having an independent measurement takes two minutes and can catch discrepancies before they become deal issues.

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