Question 4 of 10: Greyfield Redevelopment of Declining Shopping Centres

Question 4: Greyfield Redevelopment of Declining Shopping Centres (10 marks)

Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.

The concept. “Greyfield” describes previously developed, economically obsolescent urban land that is underused but is neither contaminated to the degree that defines a brownfield nor undeveloped like a greenfield. The archetype, and the origin of the term, is the ageing enclosed regional mall or strip plaza surrounded by a sea of grey asphalt surface parking: the site is fully serviced, well located on an arterial, and generating a fraction of the economic activity and municipal assessment that its land could support. The classification is economic rather than physical — a centre becomes a greyfield when its sales per square metre and occupancy fall below the level at which the retail use can justify the land value, typically because the trade area has shifted, a newer power centre or regional mall has captured it, or online retailing has permanently reduced the floorspace the market needs.

Greyfield redevelopment, sometimes called mall retrofit or suburban retrofit, converts such a site into a compact mixed-use precinct: the parking field is developed with a street and block pattern, residential and office floorspace is added above a smaller and reconfigured retail component, structured or underground parking replaces surface parking, and public open space and transit facilities are introduced. In planning terms the site is being converted from a single-use, auto-oriented superblock into a piece of urban fabric — frequently the only opportunity a post-war suburb has to create a genuine town centre, because it is the only large, single-ownership, well-located parcel remaining.

Benefits. The first is efficient use of existing infrastructure. Water, sewer, storm, power and arterial road capacity are already in the ground and already paid for; intensifying on a serviced site avoids the capital and, more importantly, the perpetual renewal liability of extending networks to a new greenfield subdivision. The second is that the growth accommodated on a greyfield is growth not consumed from farmland, natural areas or the agricultural land reserve at the urban edge, which directly serves regional growth-management and containment policy. The third is site assembly: unlike infill in an established neighbourhood, a mall site is typically in one or a few ownerships, large enough (often five to twenty hectares) for a coherent master plan, and unencumbered by existing residents, so the planning process is faster and the design is not constrained to a single parcel. The fourth is location: these sites sit on arterials at intersections that are already transit corridors, so the density added is transit-supportive and can justify service improvements — several Canadian rapid-transit extensions have been anchored by mall redevelopment. The fifth is fiscal and economic: assessment per hectare rises sharply, a declining asset returns to productive use, and the municipality gains housing supply, including the opportunity to negotiate affordable units, without expanding its service area. Finally, there is a broader community benefit — a post-war suburb that has never had a walkable centre acquires one, along with the public realm, civic space and housing variety that go with it, and the impervious surface and stormwater performance of the site can be substantially improved in the process.

Challenges. The most underestimated is legal and contractual. Mall sites are governed by reciprocal easement agreements and long-term anchor tenant leases that commonly guarantee sightlines, minimum parking ratios, and the right to veto changes to the common area — a single anchor with thirty years left on a lease can block a master plan outright, and buying out or relocating anchors is often the largest single cost item. The second is financing and phasing: the redevelopment must usually proceed while the remaining tenants continue to trade, because their rent services the debt, so construction is staged around an operating centre, which is slow, expensive and disruptive. The third is market absorption: replacing a mall with several hundred dwelling units and new commercial floorspace requires the local market to absorb that supply over a decade or more, and a phased project is exposed to a downturn part-way through. Fourth, although greyfields are by definition less contaminated than brownfields, they are not clean — dry cleaners, service stations, auto service bays, hydraulic hoists and buried fuel tanks are common, and a phase II environmental site assessment with remediation is a normal cost and schedule risk. Fifth, the planning framework usually does not permit what is proposed: the site is zoned single-use commercial with high parking minimums, so an OCP amendment, a comprehensive development rezoning, a development permit and often a subdivision are all required, along with public hearings at which the surrounding low-density neighbourhood, which has enjoyed the parking field as a buffer, objects to residential density, traffic and shadowing. Sixth, the infrastructure is present but old and sized for a different load — a 1970s sanitary connection sized for a mall may be inadequate for 1,200 dwellings, and the stormwater system almost certainly predates modern quantity and quality control, so servicing upgrades and development cost charge negotiations are involved. Seventh, the superblock must be broken: new public streets, sidewalks, transit stops and pedestrian crossings of a six-lane arterial must be created and dedicated, which is a design problem and a cost the municipality and the developer must apportion. Eighth, structured parking is expensive, and the transition from free surface parking to paid or structured parking is commercially sensitive for the remaining retailers. Finally, there is a social dimension that is easy to overlook: a declining mall is frequently a de facto community centre — a warm, safe, free indoor place used by seniors, teenagers and mall-walkers — and its independent and ethnic small businesses often cannot afford the new rents, so redevelopment displaces a real community function and a real business community unless the plan deliberately provides for both.

The planner’s role in a greyfield project is therefore to set a clear framework early — a secondary plan or master plan for the site with a street and block structure, a density and built-form envelope, phasing triggers tied to infrastructure and public realm delivery, and community amenity expectations — so that a project that will take fifteen years and several owners does not degrade into an uncoordinated series of individual rezonings.