---
title: "How I Use Google Maps to Eliminate 70% of Properties Before Leaving My Desk"
description: "Stop wasting weekends on open inspections. This Google Maps screening method checks highways, power lines, flood zones, setbacks, and neighbourhood quality in 10 minutes flat."
author: Yan Zhu
date: 2022-01-10
category: Suburb Analysis
url: https://premiumrea.com.au/blog/google-maps-property-inspection-avoid-bad-houses
tags: ["Google Maps", "property screening", "due diligence", "house inspection", "red flags", "property research", "time saving"]
---

# How I Use Google Maps to Eliminate 70% of Properties Before Leaving My Desk

*By Yan Zhu, Co-Founder & Chief Data Officer at PremiumRea — 2022-01-10*

> Last weekend I watched a family drive to four open inspections across Melbourne's southeast. Three of the four properties had deal-killing issues visible on Google Maps. They could have saved five hours and a tank of petrol. Here's the exact screening method I use.

Every Saturday, thousands of Melbourne property buyers drive from one open inspection to the next, spending their entire weekend peering into bathrooms, opening kitchen drawers, and pretending they know what they're looking at in the switchboard cupboard.

Most of them are wasting their time.

I'm not saying open inspections don't matter. They do. But the physical inspection should be your last step, not your first. Before you ever set foot in a property, you should have already eliminated the obvious deal-killers — and roughly 70% of listed properties have at least one issue that's visible from Google Maps [1].

Our team screens every property digitally before scheduling a physical inspection. Steven and Edward — our on-the-ground specialists — still inspect every property we consider buying. But they're only inspecting properties that have already passed the desktop screening. That's why their hit rate is so high and their time is so productive.

Let me walk you through the exact process I use. You'll need Google Maps, Google Earth (for historical imagery), and about ten minutes per property.

## Check 1: major roads and highways (the noise and pollution killers)

Open Google Maps. Zoom into the property. Now look at what roads are nearby.

Here are the distance thresholds I use:

**60 km/h roads:** The property needs to be at least 50 metres from the road edge. Use Google Maps' "Measure distance" tool (right-click on desktop) to check the exact distance. At 50 metres, traffic noise from a 60 km/h road is generally manageable, especially if there are other houses between the property and the road acting as sound barriers.

**80 km/h roads:** Minimum 100 metres. These roads generate significantly more tyre noise and the traffic is continuous during peak hours. Even with buffer houses, you'll hear it.

**Freeways and highways:** Minimum 150 metres, and check for sound barriers. If there's no acoustic fencing and no intervening buildings, 150 metres is not enough — the noise carries, particularly at night when ambient sound drops and freeway noise becomes the dominant frequency [2].

The property listing will never mention road noise. The agent will schedule the open inspection for a Sunday at 11am when traffic is light. Visit on a Tuesday at 5:30pm and you'll understand why the vendor is selling.

I've seen investors buy properties 40 metres from a major road because the Saturday inspection was quiet. They learned the truth on their first Monday morning in the house. Google Maps catches this in thirty seconds.

## Check 2: commercial and industrial neighbours (the problems you can smell)

Zoom into the area surrounding the property and look for commercial or industrial premises within 200 metres.

**Restaurants and takeaway shops** within 100 metres are a red flag. The issues aren't just noise from late-night patrons. It's cooking exhaust (grease smell), commercial waste bins attracting cockroaches and rodents, and the potential for alcohol-related antisocial behaviour on Friday and Saturday nights [3].

**Petrol stations** contaminate soil. If a property is within 150 metres of a current or former petrol station, there's a non-trivial chance the soil is contaminated, which affects future development potential and potentially health.

**Factories, panel beaters, tyre shops** generate noise, fumes, and heavy vehicle traffic during business hours. A house might seem peaceful on a weekend inspection, but the panel beater next door runs an air compressor from 7am to 5pm Monday to Friday.

Google Maps' satellite view shows commercial buildings clearly. Street View lets you identify the specific businesses. Spend two minutes checking what's within a 200-metre radius and you'll catch issues that the vendor's photos were carefully angled to hide.

## Check 3: high-voltage power lines and transmission towers

This one is straightforward but frequently overlooked. Switch to satellite view and look for the distinctive shadows of high-voltage transmission towers and the cleared easement corridors underneath them.

Our hard rule: no properties within 150 metres of high-voltage lines. The health concerns (childhood leukaemia studies showing elevated risk within 50 metres) are debated, but the impact on property values is not. Properties near high-voltage lines consistently sell for 5-15% less than comparable properties without proximity issues, and the discount persists over time [4].

One of our case studies involved a Glen Waverley property we purchased specifically because it was 79 metres from a high-voltage line. We knew the line suppressed the property's capital growth potential. We bought it as a cash flow play, converted it to a rooming house, and achieved $2,000 per week in rent at an 8% yield. The proximity to power lines was the reason we could buy it cheaply enough to make the yield work [5]. But that's an advanced strategy for a specific purpose — not a general recommendation.

For most investors buying for capital growth and rental yield, power line proximity is a hard veto.

## Check 4: cemeteries, road alignment, and feng shui considerations

I'm going to address something that many property professionals won't: feng shui factors affect resale value in suburbs with significant Chinese-Australian buyer pools. Whether or not you personally believe in feng shui is irrelevant. What matters is whether your future buyer pool does.

In suburbs like Glen Waverley, Box Hill, Doncaster, and parts of Melbourne's southeast where Chinese-Australian buyers represent a meaningful share of the market, certain features materially reduce demand:

**Cemeteries within 500 metres** — visible proximity to a cemetery will exclude a significant portion of potential buyers. Check satellite view for the large green rectangles with uniform internal patterns.

**T-intersection properties (road facing directly at the front of the house)** — in feng shui, this is considered negative energy flowing directly at the property. Regardless of the metaphysics, properties on T-intersections also have genuine safety concerns from headlight glare and the statistical risk of vehicle impact [6].

**Reverse bow roads** — where the road curves away from the property, creating a "cutting" effect. Again, whether you believe the feng shui implications is your business. But if 20% of your potential buyer pool eliminates these properties on sight, your resale value is structurally impaired.

Google Maps shows all of these features clearly. A two-minute check of road alignment and nearby land uses catches issues that would otherwise only become apparent after you've committed to the purchase.

## Check 5: the property itself (setbacks, extensions, and neighbourhood quality)

Now zoom in on the actual property. Switch between satellite view and Street View.

**Setbacks from boundaries:** Look at the distance between the house and the side and rear boundaries. A house that's built right to the boundary has no room for future extension, side access for construction, or car access to the rear. Our minimum requirement is 3 metres of side access — needed for crane truck access during construction and for independent tenant entry in multi-tenancy conversions [7].

**Unauthorised extensions:** Compare the roof line of the main house with any extensions or additions. If the roofing material, pitch, or style differs markedly, the extension may have been built without council approval. Unauthorised building work can create major complications at sale and with insurance.

**Neighbourhood quality:** This is where Street View earns its keep. Drive the virtual car up and down the street. Are the neighbouring properties maintained? Are there abandoned cars on front lawns? Is there visible rubbish? Are the nature strips mowed?

One house with overgrown vegetation and accumulated junk on the property can suppress values for the entire street. If the property you're considering has three well-maintained neighbours and one hoarder house next door, factor that into your assessment. The hoarder house won't appear in the listing photos.

**Historical imagery:** Google Earth (the desktop application, not Maps) provides historical satellite imagery going back years. Toggle through the timeline and look for changes: was a structure added that doesn't appear on the current planning records? Did the block next door get subdivided? Has the street gone from quiet residential to busy commercial? This historical context is invisible on a single-point-in-time inspection.

## Check 6: the deal-breakers only visible at specific times

Here's a tip that goes beyond Google Maps but ties into the same pre-screening philosophy.

After your Google Maps screening, and before you attend the Saturday open inspection, do a drive-by at two specific times:

**School drop-off/pick-up (8:15-8:45am and 3:00-3:30pm).** If the property is near a school, the traffic and parking chaos during these windows can be genuinely unbearable. Streets that seem quiet on Saturday morning are gridlocked on Tuesday at 3:15pm. Google Maps' traffic layer shows some of this, but the real experience requires a drive-by [8].

**Friday evening (6-8pm).** This catches nightlife noise from nearby commercial strips, restaurant exhaust at peak cooking hours, and the general evening noise profile of the street. A property that's serene at 11am Saturday can be chaotic at 7pm Friday.

Our team uses these timed drive-bys as part of our standard due diligence. Steven and Edward don't just inspect the property — they inspect the environment at its worst. Because that worst-case scenario is what your tenants will experience every week, and what your future buyers will experience when they do their own due diligence.

The Google Maps screening takes ten minutes. The timed drive-bys take another hour across two visits. Total pre-inspection investment: seventy minutes. Properties eliminated: typically three out of every four listings on our initial watchlist.

Those seventy minutes save you from buying a property with a deal-killing flaw that would have cost you tens of thousands in lost value or years of tenant complaints. It's the highest-return hour you'll spend in your entire property investment journey.

## References

1. [PremiumRea due diligence framework: desktop screening eliminates approximately 70% of listed properties before physical inspection.](#)
2. [VicRoads, Traffic Noise Reduction Policy: Distance-Based Noise Attenuation Guidelines for Residential Properties.](#)
3. [EPA Victoria, Residential Amenity Guidelines: Noise, Odour, and Waste from Commercial Premises.](#)
4. [Sims, S. & Dent, P., 'High-Voltage Overhead Power Lines and Property Values: A Residential Study in the UK and Australia', Urban Studies, 2005.](#)
5. [PremiumRea client case study, Glen Waverley: $1.3M purchase, 79m from high-voltage line, rooming house conversion, $2,000/wk rent, 8% yield.](#)
6. [RACV, Intersection Safety Data: T-Intersection Vehicle Impact Statistics, Metropolitan Melbourne 2015-2019.](#)
7. [PremiumRea acquisition criteria: minimum 3m side access for construction and tenant entry, 600+ sqm block size, flat topography.](#)
8. [City of Casey, School Zone Traffic Management Reports: Peak-Hour Congestion Analysis, 2018-2019.](#)

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Source: https://premiumrea.com.au/blog/google-maps-property-inspection-avoid-bad-houses
Publisher: PremiumRea (Optima Real Estate) — Melbourne buyers agent