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The largest single, mixed-use commercial redevelopment project in the city of Los Angeles is about to complete next month. The Bloc is a landmark 拢117m, 170,000m虏 regeneration project right in the heart of LA鈥檚 downtown district. On the face of it, other than its enormous scale, this type of commercial development appears fairly conventional. It contains a 485-room luxury hotel, a 70,000m虏, 32-storey high-end office tower and 37,000m虏 of retail and leisure space offering all the shops, bars, restaurants and cinema screens that one might naturally expect on any similar British development of this nature.

But two important aspects elevate the Bloc to a ground-breaking level of significance: context and construction. Downtown LA is undergoing a resurgent boom. Fifteen years ago the centre of the city was avowedly monocultural with an uncompromising and almost unilateral emphasis on office accommodation and little regard for providing the non-commercial social and leisure amenities that invigorate urban life.

Today, downtown is undergoing a transformation. Commerce has been partially displaced by the thousands of new residents that have moved into the district. In their wake, the bars, shops and restaurants and even craft breweries that were once scarce here have poured in, creating a vibrant and mixed urban community that appeals directly to residents and visitors as well as workers.

The Bloc is the largest single development to date that seeks to both reflect and accelerate this trend and therefore represents a major chapter in the story of downtown鈥檚 ongoing reinvention. It has been designed by Long Beach architects Studio One Eleven for prolific LA commercial developer The Ratkovich Company. Webcor Builders, a California-based construction company, is the main contractor.

The Bloc is also significant in construction terms. Before redevelopment began the building comprised three principal connected elements, the 32-storey office tower, the 24-storey hotel tower and, separating them, a three-storey shopping centre known as Macy鈥檚 Plaza.

Together, all three elements occupied a full city block. The complex was designed in 1973 by Charles Luckman, a high-profile modernist American architect whose design for the horrendous replacement Penn Station in New York provides a chilling clue as to why aghast Angelenos quickly named his LA hotel, office and retail complex 鈥渢he Fortress鈥�.
鈥淚t was from a completely different era,鈥� explains Studio One Eleven senior associate Marcus Luciani. 鈥淎part from the entrances, at ground level there was virtually no street interaction and it presented this intimidating series of high, blank brick walls to the surrounding streetscape.

鈥淭he shopping centre was pretty much the same, inward looking and highly defensive and a symbol of a time when LA鈥檚 crime and social problems meant that commercial owners wanted to shut the city out rather than invite it in.鈥�

Symbol

Therefore, in construction terms, the redevelopment solution is relatively simple but hugely symbolic. The hotel and office towers have been retained but extensively refurbished. But the physical and conceptual heart of the project lies in the former Macy鈥檚 Plaza. This has been demolished, heralded by the much publicised and locally cathartic dismantling of its roof this summer.

A sprawling new public space replaces the plaza and provides integrated lobby entrances to the office block as well as a host of retail and recreational amenities. These have been carefully inserted into the lower three floors of the office and hotel blocks on either side of the new public space, slotting neatly within the bays of the towers鈥� retained steel frames.

Luciani says the principle is based on a pattern of redevelopment that has been taking place across California. 鈥淲e call it de-malling here, turning inside shopping malls into outside shopping malls in order to take advantage of the great weather and activate local streets.鈥�

Significantly, the new public space has been arranged across multiple levels with its principal expanse formed at lower ground level but surrounded by a series of encircling, colonnaded terraces above. The main lower expanse provides direct access from the street via a series of steps and escalators. This lower level is important because it provides direct access to the nearby 7th Street metro station.

This is an enormously significant move. While we may take the principle of integrated public transport for granted in the UK (in theory at least, if not always in practice) there is profound notional severance between public transport and commercial development in LA.

Incredibly, the Bloc will be the first private commercial development in the metro鈥檚 25-year history to provide dedicated and direct access to the system, a move that powerfully symbolises its openness to LA鈥檚 emerging street culture and public realm, and one which Luciani states was 鈥渙ne of the easiest things on the entire project to do鈥�. Within LA, The Ratkovich Company鈥檚 chief executive Clare De Briere also describes the public transport integration as 鈥渁 real game-changer for the profile of the whole development鈥�.

In keeping with the principle of accessibility established by the metro link, the new square also instigates a new series of pedestrian street-level cross connections from one side of the block to the other, again another relatively novel concept within LA鈥檚 dense urban grid. Additionally, Luciani revels in the 鈥渇ound spaces鈥� they were able to locate within the site, a process prompted by an innovative reorganisation of accommodation hierarchy within the site in order to maximise commercial profit.

鈥淒uring the feasibility stages we noticed that the Macy鈥檚 department store barely used their third floor for anything other than storage. As a result of new integrated storage, service and retail areas they鈥檝e been able to utilise in the basement, a new nine-screen cinema has moved into their former third floor. This is a big example of similar scenarios we found across the site, underused spaces where some clever reordering has been able to realise new activity and commercial space.鈥�

Strategy

The structural strategy for the construction has been relatively straightforward. Large voids have been punched into ground floor and basement slabs to accommodate the new public space which has required additional reinforcement of surrounding structure to ensure stability.

As the original steel frame and fabric remains in fairly good structural condition, wherever possible the design team has strived to retain as much of it as possible, with the exception of course of the Macy Plaza roof which, luckily, was structurally independent. However, as with any refurbishment project, Luciani points out that there were surprises including structural slabs that 鈥渧aried up to three inches across relatively small expanses.鈥�

He also identifies phasing as one of the biggest challenges. 鈥淏oth the hotel and offices remained fully operational throughout construction. Moreover, we had to hold a big summer social function for investors in the refurbished hotel ballroom during construction, so to a degree that dictated which parts of project were complete first and where we could locate temporary access routes. There鈥檚 also a US post office on the site; legally they have to remain open so access to that also had to be maintained throughout construction.鈥�

But, as Luciani happily explains, fortunately there was one key advantage to replacing an indoor shopping centre with an outdoor square. 鈥淭he ductwork for mechanical systems was incredibly convoluted, poking through walls and slabs like Swiss cheese. But as most of it was for air conditioning and ventilation for the mall, we were able to remove a huge chunk of it.鈥�

Seminal

Both Luciani and De Briere cite New York鈥檚 seminal Rockefeller Centre as a conceptual precedent for the Bloc, an ambitious comparison but a thoroughly justified one. In their acute concentration of urban space and activity, both schemes celebrate their respective cities with a dynamically expressive approach to architecture and public realm that is inclusive, accessible and crucially from a development point of view, commercially lucrative.

Arguably, the Bloc鈥檚 achievement is to offer an even more pressing regeneration milestone as it strives so forcefully to reverse the former decline of its environs and galvanise further their current resurgence. This is a point which De Briere is keen to emphasise. 鈥淭o put it simply, LA鈥檚 downtown was dying and the Bloc site reflected that. There was no activity on the surrounding streets and it was impermeable and inaccessible. By essentially turning a full city block inside out, we鈥檝e made it part of its context and reconnected it to the city.鈥�

Of course, rightly, the Bloc is finely attuned to the form, character and culture of LA and seeks to respond to context as much as it strives to forge it. But the development鈥檚 nuanced application of established design principles also suggests an intriguing and reassuring universal truth. Whatever or wherever the site, the core ingredients of urban regeneration and good design - connectivity, accessibility, activity, diversity and innovation - tend to remain the same.

Project Team
Developer: The Ratkovich Company
Architect: Studio One Eleven
Main contractor: Webcor Builders
Structural engineer: Nabih Youssef Associates
Landscape architect: EPT Design
Office interiors: Rapt Studio
Hotel interiors: McCartan