I have heard people suggest that the EDPA is similar to the "successful" Streamside Environmental Permit Area (SDPA). This is an interesting comparison.
1. If the SDPA was developed the way the EDPA was, likely most SDPA impacted property don't even know about it. Similarly, likely realtors and buyers are unaware of what they are getting into, so SDPA impacts are not reflected in the prices of properties sold.
2. The SDPA protects streams, obviously. People don't build on streams. Most development that could impact SDPA (gardens, sheds, etc.) don't need development permits, so if you are ignorant of the SDPA, you will move forward without obtaining an SDPA permit, thereby defeating the purpose of the bylaw.
3. A steam either exists or doesn't. Unlike the EDPA, where there is considerable professional debate on whether a whether certain ecosystems even exists, there is likely less debate about the very existence of the item that is being protected.