Road & rail noise map for Guildford
Town in Surrey, South East
We analysed 2,371 postcodes in and around Guildford, Surrey against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (626) have mapped road noise of 55 dB or more by day, and 6% have mapped rail noise. 69% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at GU4 7LJ (road noise 70.0–74.9 dB by day).
Noise map of Guildford
How many postcodes are affected?
Road noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 14% (330) | 7% (163) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | 8% (198) | 7% (165) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | 3% (81) | 3% (60) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | <1% (17) | <1% (6) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 74% | 83% |
Rail noise
| Band | Day (LAeq,16h) | Night (Lnight) |
|---|---|---|
| 55.0–59.9 dB day · 50.0–54.9 dB night | 5% (119) | 5% (118) |
| 60.0–64.9 dB day · 55.0–59.9 dB night | <1% (13) | <1% (14) |
| 65.0–69.9 dB day · 60.0–64.9 dB night | <1% (1) | <1% (1) |
| 70.0–74.9 dB day · 65.0–69.9 dB night | 0% (0) | 0% (0) |
| 75.0 dB or more day · 70.0 dB or more night | 0% (0) | 0% (0) |
| Below mapped bands / not mapped | 94% | 94% |
Share of the 2,371 postcodes within ~5 km of the Guildford centre. Source: DEFRA Strategic Noise Mapping Round 4 (2022), Open Government Licence.
Noisiest postcodes in and around Guildford
Check a specific postcode
Example searches: GU1 1ED · GU1 3XD · GU1 1DT · GU1 1DP · GU1 3UT · GU1 4EZ
What this data does — and doesn't — cover
- Modelled, not measured.These are DEFRA's computer-modelled estimates (Round 4, 2022), not microphone readings at your door.
- Major sources only. The model covers major roads, major railways and large urban areas. Smaller local roads, neighbours, pubs, building sites and aircraft are not included.
- No mapped noise ≠ quiet. If a location shows no band, it means it falls outside the mapped contours — not that it is silent.
- 2022 snapshot.New roads, developments or traffic changes since 2022 won't show. The next DEFRA round is due around 2027.
More detail on the methodology page.
Bothered by road or rail noise at home?
Acoustic and secondary glazing typically cuts perceived traffic noise dramatically. We're building a free quote-matching service with vetted installers — leave your email and we'll contact you when it launches.
Nearby areas
Frequently asked questions
- How noisy is Guildford?
- We analysed 2,371 postcodes in and around Guildford, Surrey against DEFRA's Strategic Noise Mapping (Round 4, 2022). 26% of them (626) have mapped road noise of 55 dB or more by day, and 6% have mapped rail noise. 69% of postcodes have no mapped road or rail noise at all — though that reflects major-source modelling, not guaranteed quiet. The highest modelled level we found is at GU4 7LJ (road noise 70.0–74.9 dB by day).
- Where is the most road noise in Guildford?
- The postcodes with the highest modelled daytime levels in and around Guildford are GU4 7LJ, GU1 1DP, GU2 7UY, based on DEFRA's 2022 model of major roads and railways.