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Why the best new buildings are actually old ones- Architecture Weekly ·

 Architecture Weekly  

Why the best new buildings
are actually old ones

Tate Modern. The High Line. LocHal. What they have in common.

Theme: Adaptive Reuse & Second Life
This issue  ·  7 sections  ·  Architecture · Interior Design · Landscape · Urban Design · Materials · AI · Revit
"The most sustainable building is one that is already built."
— Carl Elefante FAIA, Former President, American Institute of Architects

Adaptive Reuse: Giving Old Buildings a Second Life



"Every year, the construction industry produces 40% of global CO₂. What if the most sustainable building is the one already standing?"

Photo: e-architect


Adaptive reuse is the process of repurposing a building for a new use while retaining its structure and historical character. It is distinct from renovation — which keeps the same use but updates the building — and from demolish-and-rebuild, which starts from nothing. Each approach carries different carbon and cost implications, but increasingly the evidence favours keeping what already stands.

LocHal Public Library Building of the Week

Tilburg, Netherlands · Opened January 2019

Original use
Locomotive shed, NS Dutch Railways (1932)
Architects
Civic Architects + Braaksma & Roos + Mecanoo + Petra Blaisse
Programme
62,000 library items, co-working, arts, café
Scale
90 × 60 m, 15 m ceilings, steel trusses retained
World Interior of the Year 2019 — Public Interior  ·  Visited by architects from 60+ countries since opening
16%
Lower cost/m² vs new build (Historic England, 2021)
50–75%
Embodied carbon saved vs demolish-and-rebuild (WRAP, 2023)
35M
Buildings targeted for renovation under EU Renovation Wave by 2030
  • Tate Modern, London (2000) — Bankside Power Station by Giles Gilbert Scott, converted by Herzog & de Meuron. Now the world's most visited modern art museum.


  •                                                                              Photos: Dezeen
  • Gasometer City, Vienna (2001) — Four 19th-century gas holders, 72 m diameter each, converted into 600+ apartments, a hotel, concert hall, and shopping arcade.
  • LocHal Library, Tilburg (2019) — Locomotive shed to public library. World Interior of the Year 2019.
  • Adaptive Reuse Architecture: Giving Old Buildings a Second Life
 Which old building in your city deserves a second life? Hit reply — we read every answer.

Industrial Interiors: Styling the Bones of Old Factories

"The cracks in the wall aren't flaws. They're the story."

Industrial interiors celebrate rather than conceal the structural and material legacy of converted buildings. The core palette — exposed brick, raw steel beams, polished concrete floors, visible ductwork — forms a backdrop that new interventions can layer onto without erasing history.

  • 2026 trend: Venetian plaster and limewash finishes are up 90%+ in search — both layer onto industrial surfaces with exceptional results.
  • Lighting strategy: High ceilings in converted spaces require layered pendant, track, and floor lighting to restore human scale.
  • Ace Hotel Chicago (former United Artists Theatre, 1921) — ornamental plasterwork ceiling became the centrepiece of the lobby design.

  • Colour approach: Muted terracotta, rust, charcoal, and raw timber against concrete and steel — warm neutrals that reference the original material language.
  • Residential tip: Keep original window proportions and expose original floor structure wherever possible.


Brownfield to Green: Reviving Abandoned Land

"The High Line didn't just save a railway. It rewrote how cities think about what's worth keeping."

Brownfield sites — previously developed urban land, often contaminated but no longer in active use — represent one of the largest untapped resources for public green space in cities worldwide.

8M
Visitors/year to the High Line — more than the Statue of Liberty
$2B+
Real estate development triggered by the High Line
450,000+
Brownfield sites in Europe, mostly in urban centres
  • The High Line, New York (2009–2014) — 2.3 km elevated freight railway transformed into public park by James Corner Field Operations + Diller Scofidio + Renfro.


  • Landschaftspark Duisburg-Nord, Germany (2002) — Steelworks reimagined as ecological park; blast furnaces now serve as climbing walls, gasometers as diving tanks.
  • Remediation strategies: Phytoremediation (contaminant-absorbing plants), capping (sealing contaminated soil), bioremediation (bacteria-based cleaning).
  • ASLA 2026 priority: Brownfield regeneration linked directly to biodiversity goals and climate action targets.
  • Brownfield to Green: Reviving Abandoned Land
The High Line receives 8 million visitors per year — more than the Statue of Liberty. Pass it on to the landscape architects in your network.

15-Minute City: Is It Really Working?

"Paris promised every resident could reach work, school, and groceries within 15 minutes on foot. Two years in — what's the verdict?"

Professor Carlos Moreno proposed the concept in 2016; Paris Mayor Anne Hidalgo adopted it as official city policy in 2020. The principle: housing, employment, food retail, healthcare, education, and recreation all reachable within 15 minutes on foot or bicycle.

Photo: [King's Cross regeneration model] / Unsplash 


  • Paris 2020–2026: 1,000 km of new cycling infrastructure, school streets closed to cars, 170,000 parking spaces converted to public realm.
  • Honest critique: Property values rose 18% in the most-improved areas — raising gentrification concerns as workers were displaced from those neighbourhoods.
  • Melbourne's 20-minute neighbourhood adds explicit equity metrics, measuring access by income quartile to ensure benefits reach all residents, not just the affluent.
  • Bogotá's Ciclovía: 127 km of car-free streets every Sunday since 1974 — the world's longest-running 15-minute city infrastructure experiment.
  • Adaptive reuse link: The model depends on converting empty offices and retail units into housing, clinics, schools, and community hubs.
  • Unresolved: No published study yet proves the model works for suburbs, peri-urban areas, or lower-income regions with less dense infrastructure.
  • 15-Minute City: Is It Really Working?
Discussion: Is your city ready for a 15-minute neighbourhood? What single change would make the biggest difference? Hit reply and tell us.

Hempcrete & Mycelium: The Comeback Materials of 2026

"These aren't experimental curiosities. One built walls 1,500 years ago in France. The other grows in a mould in six days."

Photo: [The organic brick structure "Hy-Fi"] / https://www.holcimfoundation.org/


Hempcrete

Hemp hurd + lime binder + water. Zero Portland cement.

Carbon: Sequesters ~110 kg CO₂/m³ during growth. Net carbon negative.

Thermal: 0.13 W/mK — reduces heating/cooling loads by up to 30% (BRE, 2022).

Real project: Flat House, Margent Farm, Cambridgeshire (Practice Architecture, 2020) — first UK home built primarily with prefabricated hempcrete panels.

Cost 2026: ~£130–180/m² installed in UK.

Mycelium Composites

Fungal root structure grown in custom moulds over agricultural waste.

Properties: Rigid, fire-resistant insulation and cladding panels.

Suppliers: Ecovative Design (USA) — insulation panels; Mogu (Italy) — acoustic tiles and flooring.

Adaptive reuse fit: Lightweight and vapour-permeable — ideal for insulating historic masonry without trapping moisture.

Cost 2026: €45–90/m² from Mogu.

Resources: BRE.co.uk and ASTM testing standards for bio-based building materials.

Scan-to-BIM: How AI Is Transforming Building Surveys

"A building survey that used to take 3 weeks now takes 3 hours. Here is the exact workflow firms are using."

Scan-to-BIM uses LiDAR scanners to capture millions of 3D data points on site. AI software then converts the resulting point cloud into intelligent BIM geometry — complete with classified structural elements, walls, floors, and openings.

Matterport Pro3
Consumer-to-professional scanner. 3D walkthroughs + OBJ/point cloud exports.
From $5,995 + $79/month
Leica BLK360 G2
Professional-grade, 5mm accuracy. Widely used by heritage conservation firms.
~£20,000
Autodesk ReCap Pro
Industry-standard point cloud processing. Classifies surfaces, removes noise, exports to Revit.
£790/year

Complete workflow

  1. Scan on site with LiDAR scanner
  2. Upload point cloud to Autodesk ReCap Pro
  3. AI processes and classifies surfaces, removes noise
  4. Export linked
    .RCP
    file to Revit
  5. Begin design overlay on existing conditions model
±5mm
Accuracy at 1:50 scale — better than traditional measured drawings
18 → 2
Working days saved on a Manchester 1890s mill survey (real UK case)
~75%
AI classification accuracy — architect review always required
Lead magnet idea: 'Download our free Scan-to-BIM workflow checklist — 8 steps from site to Revit model.'

Revit Phasing for Renovation Projects: The Complete Workflow

"Phasing is Revit's most underused feature. For adaptive reuse projects, it is the most essential one."



Revit phasing assigns every model element to a specific construction phase — Existing, Demolished, or New Construction — controlling what appears in each view and schedule. For renovation and adaptive reuse work, it is the difference between a model that communicates clearly and one that creates contractor confusion.

  1. Create phases — Manage tab → Phasing panel → Phases button. Add three phases in sequence: Existing Construction, Demolition, New Construction.
  2. Assign phases to elements — Select any wall, floor, or column → Properties panel → set Phase Created = Existing Construction. For elements to be removed, set Phase Demolished = Demolition.
  3. Set Phase Filters per view — View Properties → Phase Filter → 'Show Previous + New' for working drawings; 'Show Previous + Demolished + New' for demolition plans.
  4. Configure Graphic Overrides — Manage → Phasing → Graphic Overrides. Demolished elements: dashed grey. New elements: solid black/colour. Essential for contractor clarity.
  5. Build phase-based schedules — Add Phase Created and Phase Demolished fields to any schedule. Filter to show only demolished elements for cost estimation export.

Critical error to avoid

Doors and windows (hosted elements) inherit their host wall's phase. Always verify hosted element phases separately after setting wall phases. Never start a renovation project in the default New Construction phase — model all existing conditions in Phase 1 first.

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