Commercial real estate brokers work with geographic data every day, listings, comps, client properties, market activity, but most of it lives in spreadsheets and CRM databases with no map view. The tools that offer mapping (CoStar, Reonomy) charge hundreds per month. For brokers who need to see their listings on a map, filter by property characteristics, and share views with clients, there's a free alternative.
This guide covers how to map your CRE data using Google Sheets and the InstaMaps add-on, the same workflow that field sales teams use for territory mapping, applied to commercial real estate.
- →CRE brokers can map their entire listing inventory, comp database, and client properties on Google Maps for free using Google Sheets and InstaMaps.
- →Create separate layer tabs for listings, comps, and client properties — each appears on the map in a different color.
- →Filter by property type, price range, square footage, or any column in your spreadsheet. The map updates instantly.
- →Proximity matters in CRE: 'We just closed a deal in this building' is the strongest pitch to a neighboring property owner.
- →Export filtered results to a new sheet tab — send a targeted list to clients without sharing your full database.
Set Up Your CRE Map in 5 Minutes
The setup uses Google Sheets tabs to separate different property categories, each appearing on the map in its own color.
- Tab 1 — 'layer_Listings'
your active listings with address, property type, asking price, square footage, cap rate. Set tab color to blue.
- Tab 2 — 'layer_Comps'
recent comparable sales with address, sale price, date, property type, price per square foot. Set tab color to green.
- Tab 3 — 'layer_Clients'
properties owned by current clients, useful for identifying expansion opportunities or cross-selling. Set tab color to yellow.
- Tab 4 — Open the <a href='https
//workspace.google.com/marketplace/app/instamaps/103204565785' target='_blank' rel='noopener noreferrer'>InstaMaps add-on and click Load Map. All three layers appear color-coded. Filter by property type, zoom to a submarket, or search by price range.
CRE Workflows the Map Enables
The map turns static spreadsheet data into actionable views for three core CRE workflows.
Market analysis: overlay listings and comps in the same submarket. See pricing patterns, where asking prices are above or below recent comps. Zoom to a corridor and filter by property type to see inventory concentration.
Client presentations: filter to a specific property type and price range. Screenshot the map showing relevant opportunities. Export the filtered list to a new tab and share with the client, they see only the properties that match their criteria, not your full inventory.
Prospecting: map your closed deals and active listings. Identify buildings and blocks where you have no presence. Those are prospecting targets. When you approach a property owner, reference nearby deals: 'We just represented the sale at 450 Main, $285 per square foot. Your building has similar characteristics.' Proximity-based credibility works in CRE just like it works in field sales.
Why Proximity Matters More in CRE Than Any Other Industry
In commercial real estate, proximity IS the product. Properties two blocks apart might have identical square footage and completely different values based on which side of a street they sit on. A comp from the next block is relevant. A comp from across town is noise.
This is why mapping your deals geographically is more valuable than listing them in a spreadsheet sorted by date. The spreadsheet shows you what closed. The map shows you where your influence is, which blocks you've done deals on, where your comps give you pricing authority, and where property owners should take your call because you demonstrably know their submarket.
Every closed deal expands your geographic credibility. A broker with 5 deals on the same street has pricing authority that no market report can replicate. The map makes that authority visible, to you when you're prospecting, and to clients when you're pitching.
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Common Questions
No. CoStar and Reonomy provide proprietary market data, ownership records, lease comps, tenant information. InstaMaps maps YOUR data, your listings, your comps, your client properties. It's a visualization layer on top of data you already have in spreadsheets, not a data source. Use CoStar for research, InstaMaps for visualization and client presentations.
Share the Google Sheet with the client using Google's native sharing. They can open InstaMaps and see the same map. For a more controlled approach: filter to relevant properties, export to a new tab, and share only that tab. The client sees a curated list without access to your full inventory.
Any spreadsheet with property addresses. Full address in one column or split across columns (Street, City, State, ZIP). If you have lat/lng coordinates, those work too and skip the geocoding step entirely. Include columns for property type, price, square footage, or any attributes you want to filter by.
Listings, comps, and client properties on one map. Color-coded, filterable, exportable. See your geographic presence and pitch with local authority.
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