P4 is the Open Space zone under the City of Hamilton's Zoning By-law 05-200. It is drawn on 261 zone polygons covering about 2,646 hectares, mostly in Flamborough planning unit 1100, Glanbrook planning unit 4200 and Glanbrook planning unit 4100. 33 carry a special exception; 2 carry a holding provision.
Last checked October 8, 2026·City of Hamilton·How we know
City of Hamilton Open Data Licence (version 1.1, January 2017) Terms
From the source
the zone code on each polygon · the zone's name, from Zoning By-law 05-200, sections by zone (City of Hamilton) · the exception and holding markers on each polygon
Derived by HamiltonIQ
polygon count and hectares, from each polygon's outline · neighbourhoods and wards, by the point inside each polygon · the simplified outlines on the map
HamiltonIQ’s words
the summary sentence
Kept current
Rebuilt from the City of Hamilton's layer by the site's data pipeline; every count on this page is from the record checked October 8, 2026.
At a glance
Zone code
P4
Name in the by-law
Open Space
By-law
Zoning By-law 05-200
Zone group
Open Space and Park Zones
Polygons
261
Hectares
2,646
With a special exception
33
With a holding provision
2
Neighbourhoods
71
P4 zone polygons (By-law 05-200)The outline is the City of Hamilton boundary.
The 160 smallest polygons are too small to see at this scale and are not drawn; every polygon is counted.
Where P4 applies
Polygons and hectares by the City of Hamilton’s neighbourhood outlines, each polygon placed by a point inside it. 4 zone polygons fall outside every neighbourhood outline.
25 zone polygons sit inside another polygon on the layer (the map draws one zone over another without cutting a hole). Their hectares are counted here and in the other zone; the by-law map decides which applies.
What the zone permits
The permitted uses and regulations for P4 are set out in Section 7.4, Zoning By-law 05-200. HamiltonIQ does not paraphrase them: an exception, a holding provision or a later amendment can change what applies to one lot. The City of Hamilton’s Zoning Verification Report Application is the City of Hamilton’s own answer for a property. The interactive zoning map shows the zone on a single lot.
Sources
Every factual claim above traces to one of these documents.