Studio Matrx Monthly · Volume 1 · Issue 2 · July 2026
Amogh N P
✦ In loving memory of Amogh N P — Architect · Designer · Visionary ✦
An adaptively re-used interior in an old brick and stone building with exposed original structure and a clearly modern insertion of steel and glass, warm daylight, no text
Unit IVInterior Design Studio V

Programme, Adaptive Re-use & the Complex Interior

The greenest building is the one that already exists

55 minByAmogh N P· Architect & interior designer

A complex building is resolved by zoning its programme — public from private, served from servant — before planning rooms, and by treating circulation as a primary problem. The studio’s signature theme is adaptive re-use: the greenest building is the one that already exists, so you work with an existing structure and stage an honest dialogue between old and new — neither fake-heritage pastiche nor erasure. And you make the complex or old building genuinely accessible, where the gentle 1:12 ramp — long, and planned in early — is the emblem.

Learning objectives

By the end of this lesson, you will be able to — mapped to the course outcomes for Interior Design Studio V:

1
CO4 · Analyse

Zone a complex programme — public/private, served/servant — and resolve its circulation.

2
CO4 · Understand

Argue for adaptive re-use and design an honest dialogue between old and new.

3
CO4 · Apply

Make a complex or existing building genuinely accessible, including its ramps and circulation.

Zoning a complex building

Reading the programme

A complex building is resolved by zoning before planning rooms: group public from private, and served spaces from the servant spaces that support them (Kahn). Circulation — the public route — is a primary problem, not a leftover.[1]

Zone the programme before planning rooms Group public apart from private, then draw adjacencies PUBLIC Foyer Cafe Hall PRIVATE Office Store one controlled link between zones
DiagramA zoning bubble diagram grouping public spaces apart from private with adjacency lines
Served and servant spaces (Kahn) Big rooms are served; small cores serve them SERVED main hall SERVED gallery WC servant Duct Stair servant SERVANT CORE
DiagramA plan showing large served spaces and the small servant spaces (services, stores, toilets, ducts) that support them, in Kahn's manner

Zoning a complex building

A complex building is resolved by ZONING its programme before planning rooms. Group PUBLIC spaces (entrance, foyer, halls) apart from PRIVATE ones (offices, back-of-house); group SERVED spaces (the main rooms people use) apart from the SERVANT spaces that support them (services, stores, toilets, ducts) — Louis Kahn's distinction. Zoning by these relationships, and by the programme's required adjacencies, gives a diagram of the building before a single wall is drawn, and keeps a complex brief from becoming a muddle.[1]

The greenest building already exists

Adaptive re-use

The greenest building is the one that already exists — re-use saves the embodied carbon of demolition and rebuild. New work meets the old in an honest dialogue, made legibly new; ‘copy the old in fake-old style’ is a myth.[2, 3]

The greenest building already exists Adaptive re-use versus demolish and rebuild RE-USE new interior old shell kept embodied carbon kept DEMOLISH & REBUILD rubble CARBON wastes what was built
DiagramAn old building kept and re-used beside a demolished-and-rebuilt pile with a carbon cloud struck out, captioned the greenest building already exists
Make the new legibly new Old shell plus honest new insertion, not fake-old HONEST DIALOGUE old stone new steel & glass reads as new FAKE-OLD PASTICHE imitation arches pretend it is old
DiagramAn old brick-and-stone shell with a clearly modern steel-and-glass insertion reading as distinct layers, with a fake-old pastiche version struck out

Re-use before rebuild

The studio's signature theme is ADAPTIVE RE-USE — giving a new interior life to an old or abandoned building. Its first argument is environmental: 'the greenest building is the one that already exists' (Carl Elefante), because re-using a structure saves the vast EMBODIED carbon and material of demolition and rebuilding — the sustainability lesson applied to whole buildings. So the mature designer asks first whether an existing building can be adapted, and treats demolition as the last resort, not the default.[2, 3]

An accessible ramp is long

Accessible circulation — the ramp

Making a complex or old building accessible is a real problem, and the ramp is its emblem: gentle (no steeper than 1:12) and therefore long, with landings and 1200 mm clear width, planned in from the start. The explorer shows just how much length an accessible gradient demands.[4]

An accessible ramp is LONG — plan it early 750mm rise at 1:12 needs a 9m run plus a landing upper level LANDING handrail both sides rise 750mm run = 9m (1:12)
DiagramA section of an accessible ramp at 1:12 with a landing, handrails and the long run needed for a 750mm rise

Ramp-gradient explorer · an accessible ramp is LONG

Run needed ≈ 7.20 m

Meets 1:12
6007.20 m run1:12

A 600 mm rise at 1:12 needs about a 7.20 m run. Gentle enough to be accessible.

India’s Harmonised Guidelines: a ramp no steeper than 1:12, min clear width 1200 mm, landings on long runs. An accessible ramp is LONG — plan it in early. (Illustrative teaching figures.)

The ramp in the complex plan

Making a complex or existing building accessible is a real design problem, and the RAMP is its emblem. An accessible ramp is gentle (no steeper than 1:12 in India's guidelines) and therefore LONG — a 750 mm rise needs a 9 m run — with landings and a clear width of at least 1200 mm, so it must be planned into the scheme from the start, not squeezed in later. Lifts serve every level, thresholds are level, and the accessible route is the MAIN route. The ramp explorer below shows just how much length an accessible gradient demands. Try it.[4]

Fact vs folklore

At a glance

AspectThe factThe folklore
A complex programme is resolved byZONING (public/private, served/servant) before planning roomsDrawing rooms straight away
Circulation in a public building isA primary design problem — the public route, kept clearA leftover between rooms
The greenest building isThe one that already exists — re-use before rebuildA brand-new efficient one
New work in an old buildingMade legibly NEW — an honest dialogue with the oldFaked to look historic (pastiche)
An accessible ramp isGentle (1:12) and LONG — planned in earlyA short steep ramp added late
Access in a re-use projectHarder but essential — inclusion and heritage as alliesSkipped because the building is old
Vocabulary

Key terms

Zoning (served & servant)

Grouping a programme by relationship — public from private, and served spaces (main rooms) from the servant spaces that support them (Kahn) — a diagram before any wall is drawn.

Circulation (public route)

How a stranger enters, orients, reaches a destination and leaves — a primary design problem in a public building, kept clear, accessible and separate from service routes.

Adaptive re-use

Giving an old or abandoned building a new interior life — argued first on sustainability: the greenest building is the one that already exists (its embodied carbon is already spent).

Old-new dialogue

Letting new work read clearly as new within the old fabric — an honest contemporary insertion rather than a fake-historic pastiche or an erasure of the old.

Accessible ramp (1:12)

A ramp no steeper than 1:12 (India's guideline), hence long — a 750 mm rise needs a 9 m run — with landings and 1200 mm clear width, planned in from the start.

Embodied carbon (buildings)

The carbon and material already spent making an existing building — saved by re-using rather than demolishing and rebuilding, the environmental case for adaptive re-use.

Apply it

Studio task

Find one old or abandoned building near you — a warehouse, a bungalow, a mill — and propose an adaptive re-use as a small public building. First zone the programme onto the existing structure (public/private, served/servant) and resolve the public circulation. Then design the old-new dialogue: decide what of the old fabric you keep and reveal, and make your new insertions read legibly as new — not fake-old. Finally, make it accessible: using the ramp explorer, work out the ramp run your entrance level-change needs at 1:12, add a lift where stairs go, and show the accessible route as the main route. Close with the honest verdict: how your scheme saves an existing building, includes everyone, and lets old and new speak.

Check your understanding

Self-assessment

1. How is a complex programme first resolved?

2. Why is adaptive re-use argued first on sustainability?

3. How should new work meet an old building?

4. Why must an accessible ramp be planned in from the start?

5. How do accessibility and heritage relate in a re-use project?

In a nutshell

Recap

A complex programme is resolved by ZONING (public/private, served/servant — Kahn) into a diagram before planning rooms, keeping a big brief from becoming a muddle.
CIRCULATION is a primary design problem — the public route must be clear, generous, accessible and legible, and separate from private and service routes.
The greenest building is the one that ALREADY EXISTS — adaptive re-use saves embodied carbon, so re-use comes before rebuild and demolition is the last resort.
New work meets the old in an honest DIALOGUE — made legibly new, neither fake-historic pastiche nor erasure; the richest re-use keeps and reveals the old.
An accessible RAMP (1:12) is long and must be planned in early; in a re-use project, inclusion and heritage are allies, the new access part of the honest new layer.
The evidence

References & further reading

  1. [1]Programme, zoning and circulation in complex buildings — served and servant spaces, public routes (Louis Kahn; Robert Rengel, Shaping Interior Space; Karlen, Space Planning Basics). https://www.wiley.com/
  2. [2]Adaptive re-use and embodied carbon — 'the greenest building is the one that already exists' (Carl Elefante, 2007) and the sustainability case for re-use. https://www.archdaily.com/
  3. [3]Adaptive re-use and the dialogue of old and new — honest contemporary insertion versus pastiche (conservation and adaptive-reuse practice; Rem Koolhaas / OMA and others). https://www.archdaily.com/
  4. [4]Accessible circulation and ramps — gradient, landings and clear width (India Harmonised Guidelines 2021, ramp 1:12, 1200 mm clear width). https://ccpd.nic.in/harmonized-guidelines-for-standards-of-accessibility/

Further reading

  • Robert Rengel, Shaping Interior Space.
  • Graeme Brooker & Sally Stone, Rereadings: Interior Architecture and the Design Principles of Remodelling Existing Buildings.
  • Ernst Neufert, Architects' Data (space standards and circulation).

Sources gathered and fact-checked June 2026. Published values vary by source, sample and method — treat as indicative and confirm against the cited standard before structural use.

A

The author

Amogh N P

Architect, interior designer, and creative polymath. Studio Matrx began in his notebooks — his vision of design made honest, useful, and open to everyone. Its Academy is written and taught in his memory, and free, forever.

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