Pre-Con · Design Intent (DI) · Worked example Northgate Chambers - Floors 4-6 Cat-B Fit-Out · Cushman Workplace · NG-2026-0042 · £1.42m
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DI · Design Intent

Design Intent

Twelve design intent items capturing why each specification decision was made — so that downstream substitutions, value engineering and site decisions serve the original intent, not just the technical minimum.
Project
Northgate Chambers — Floors 4–6 Cat-B Fit-Out
Reference
NG-DI-001 · Revision 1
Prepared by
Built AI Ltd · A. Pereira (Design Manager)
Issue date
Thursday 22 May 2026
Issued to
Cushman Workplace · Trenholme Architects · Wexley & Crowne LLP
Status
For Tenant Review & Sign-off
built-ai.io · hello@built-ai.io © 2026 Built AI Ltd BUILT AI
WHY DESIGN INTENT MATTERS

Specifications describe what. Intent records why.

A specification says "European oak veneer, AA-grade, book-matched." The design intent says why that particular choice was made — because the tenant is a legal firm where the workplace must convey permanence, restraint and credibility to visiting clients, and the material palette needs to feel current in twelve years' time.

When a supplier proposes a substitute, when a VE option is considered, when a site decision needs making — the specification alone doesn't tell you whether the alternative serves the purpose. The design intent does. This document captures twelve intent items, each linked to the specification clauses it drives, the samples that evidence it, and the tenant decisions that confirmed it.

TWELVE DESIGN INTENT ITEMS

The "Why" Behind Every Decision

DI-01

Reception Arrival — First 15 Seconds

A visitor arriving at the L6 reception should read "Wexley & Crowne" within the first fifteen seconds — calm, considered, distinct from a generic Cat-A office lobby. Brand visible without dominating. Contact with reception within one sightline, no doubling back.

Specification clauses driven

  • A7.01 Reception desk — material, height, brand integration
  • A7.03 Feature wall — timber, lighting, logo positioning
  • A2.08 Manifestation — density at reception entrance glazing
  • M2.07 Lighting — feature pendant at reception (Bocci 28)

Evidence & approvals

  • Workshop 19 May 2026 — Cushman + Wexley brand lead + Trenholme
  • Reception brief confirmed — DI-09 output feeds SPC-A7
  • Feature wall concept approved by F. Crowne-Hewitt (Wexley)
Captured: 8 May 2026 · Workshop 19 MaySigned off
DI-02

Meeting Suite Acoustic Privacy

Legal-sector privilege requires that no client conversation is audible from the corridor or open plan. The design test: a colleague passing a closed meeting room door cannot hear named-client information. This drives the 42 dB specification, the magnetic door seal, and the full-height partition-to-slab detail.

Specification clauses driven

  • A2.01 Stud partitions — Rw 42 dB, mineral wool infill, decoupled head
  • A2.06 Glazed partitions — 12mm acoustic laminated glass, system-tested Rw 42 dB
  • A2.12 Door sets — Rw 32 dB assembly, magnetic seal, concealed closer
  • A3.07 Ceiling — acoustic access panels at FCU positions

Evidence & approvals

  • SG-15 closure — Cushman confirmed 42 dB (uplift from 38 dB outline spec)
  • MU-01 mock-up — on-site acoustic test measured Rw 43 dB (9 Jun)
  • SMP-07 glazed partition sample — approved 21 May
Captured: 8 May 2026 · Tested at MU-01 9 JunSigned off
DI-03

Tea Points as Collaboration Zones

Tea points serve more than coffee. They host informal client introductions and partner-trainee mentoring conversations. The design intent is a space that's visible from open plan but not overheard — booth seating, soft lighting, acoustic ceiling treatment, a material quality that signals "this is part of the workplace, not a utility room."

Specification clauses driven

  • A4.09 Tea point cabinetry — European oak veneer, Corian worktop
  • A3.04 Acoustic ceiling — Class A absorption above tea points
  • M2.07 Lighting — recessed downlights 3000K (warm, not clinical)
  • A5.06 Vinyl flooring — Forbo Sarlon (soft, warm grey)

Evidence & approvals

  • Workshop 8 May — Wexley workplace team input on usage patterns
  • Appliance scope confirmed tenant-direct (AP-07 closure)
  • SMP-03 vinyl sample — approved 18 May
Captured: 8 May 2026Signed off
DI-04

Workstation Lighting — Comfort Over Compliance

CIBSE LG7 sets the floor (300–500 lux task). Wexley's lawyers and trainees work long hours on detailed legal documents. Lighting must support eight-hour reading without eye strain — direct/indirect mix, low UGR, daylight integration via L4 perimeter glazing. The design test: a trainee working at 19:00 in January doesn't reach for a desk lamp.

Specification clauses driven

  • M2.07 Lighting — Whitecroft Mantis III, 4000K, UGR <19, 40/60 direct/indirect
  • M2.08 Lighting control — DALI dimming, daylight-linked sensors at perimeter
  • M2.09 Emergency lighting — maintained fittings integrated into ceiling grid

Evidence & approvals

  • SG-09 closure — lighting zone strategy confirmed 21 May
  • SMP-05 lighting samples — approved 21 May
  • Lambourne Vance lux level calculations — 420 lux average maintained
Captured: 11 May 2026Signed off
DI-05

Material Palette — Restrained, Partner-Grade

European oak, off-white plaster, dark navy textile, brushed brass accents. No statement colour, no trend material, no fashion-led detail. The palette should still feel current in twelve years — the typical lease term for a legal-sector tenant. Quality is communicated through material depth and craftsmanship, not through novelty.

Specification clauses driven

  • A4.01 Veneer — European oak, AA-grade, hard-wax oil matt
  • A2.12 Ironmongery — brushed brass lever, not satin chrome
  • A6.01 Paint — Dulux Trade, off-white dominant, navy accent
  • A5.01 Carpet — Milliken Laylines, neutral tone

Evidence & approvals

  • SMP-01 oak veneer — approved 14 May
  • SMP-04 paint palette — approved 14 May
  • SMP-02 carpet tile — Milliken confirmed 18 May
  • SMP-06 door & ironmongery — approved 16 May
Captured: 11 May 2026Signed off
DI-06

L6 → L5 → L4 — Visual Continuity

All three floors connect via internal stair (landlord scope). The Cat-B finish must read as the same firm on each floor. Carpet, paint, wayfinding signage and door schedule all coordinated. Not identical — varied within a controlled palette so each floor has its own character but belongs to the same family.

Specification clauses driven

  • A5.01–A5.03 Carpet — same product, colour varies per floor within palette
  • A6.01–A6.03 Paint — same product range, accent wall colour varies per floor
  • A2.12 Doors — consistent ironmongery and finish across all floors

Evidence & approvals

  • Trenholme colour schedule — 3-floor palette issued 15 May
  • Cushman confirmed continuity approach 18 May
Captured: 12 May 2026Signed off
DI-07

Joinery as Integrated Infrastructure

Meeting suite joinery walls carry AV cabling, power and acoustic treatment behind a single architectural plane. No exposed conduit, no surface-mounted screens, no retro-fitted cable trays. Cabling channels designed at spec stage and coordinated with AV specialist before manufacture — not discovered on site.

Specification clauses driven

  • A4.04 AV cable channels — 80 × 50mm internal, lockable access
  • A4.01 Feature wall substrate — designed for integrated routing
  • CC-04 resolution — joinery shop drawings issued with channel positions

Evidence & approvals

  • CC-04 resolved 12 May — AV specialist confirmed channel dimensions
  • MU-01 mock-up — cable channel access demonstrated 9 Jun
  • N. Bramwell (Wexley IT) confirmed fit for 4× HDMI + 2× Cat6A
Captured: 12 May 2026 · Tested at MU-01 9 JunSigned off
DI-08

Wayfinding — No Signage Clutter

Meeting suite naming is essential — it appears in Outlook calendar invites and must be findable by visiting clients. But all other wayfinding should be integrated into architectural surfaces. No applied numbered signs, no plastic plaques, no branded sticker strips. Room names etched into brushed brass plates on door frames.

Specification clauses driven

  • A2.12 Door ironmongery — etched brass name plate detail
  • A2.08 Manifestation — density supports wayfinding without additional signage

Evidence & approvals

  • Wexley meeting room naming schedule (8 rooms) issued 14 May
  • Trenholme door detail drawing with name plate integration
Captured: 13 May 2026Signed off
DI-09

L6 Reception Experience

The L6 reception is the firm's front door. Visitors should experience arrival as considered and unhurried — a brief pause in a calm space before meeting their lawyer. Reception desk at standing height, not a fortress. Feature wall behind reception carries the brand. Low-level seating for 4 visitors, positioned to see the city view through perimeter glazing.

Specification clauses driven

  • A7.01–A7.06 Full SPC-A7 reception package
  • M2.07 Feature pendant lighting at reception
  • A5.01 Floor finish transition — carpet to stone-effect vinyl at threshold

Evidence & approvals

  • Design intent workshop 19 May — Cushman + Wexley brand + Trenholme
  • Feature wall concept sketch approved by F. Crowne-Hewitt
  • Reception joinery ordered as WP-06 (£23,200)
Workshop: 19 May 2026 · Design locked 16 JunSigned off
DI-10

AV Experience — Invisible Technology

Video conferencing in client meetings should feel effortless. One touch to start. No visible control panels, no tangle of cables on the table, no "can you hear us?" moments. Ceiling microphones so the table stays clear. Displays integrated into the joinery plane. The technology should be invisible when not in use and immediate when needed.

Specification clauses driven

  • X1.01–X1.08 Full SPC-X1 AV package
  • A4.04 Joinery AV cable channels — display flush-mounted behind veneer
  • M2.14 Power to AV positions — dedicated circuits per room

Evidence & approvals

  • N. Bramwell (Wexley IT) confirmed Zoom Rooms platform 27 May
  • Visualis AV — room configuration schedule issued 30 May
  • MU-01 mock-up — AV integration demonstrated 9 Jun
Captured: 20 May 2026 (post NG-014 closure)Signed off
DI-11

Brand Integration — Presence Not Dominance

Wexley & Crowne's brand should be felt in the space through material quality and spatial experience, not through logos on every surface. Brand presence limited to: reception feature wall (dimensional lettering), meeting room name plates (etched brass), and manifestation pattern (custom frosted gradient). No branded carpet tiles, no wallpaper logos, no illuminated signage.

Specification clauses driven

  • A7.03 Reception feature wall — dimensional lettering specification
  • A2.08 Manifestation — frosted gradient (approved), not branded pattern
  • A2.12 Door name plates — etched brass, brand font

Evidence & approvals

  • Wexley brand guidelines received 14 May
  • Cushman + Wexley brand lead confirmed approach 19 May
  • SMP-08 manifestation pattern — approved 21 May
Captured: 19 May 2026Signed off
DI-12

Wellbeing & Daylight — Working With the Building

Northgate Chambers has generous floor-to-ceiling glazing on two elevations. The Cat-B layout should exploit this — workstations oriented to benefit from natural light, meeting rooms positioned at the core (where acoustic privacy matters more than views), tea points at perimeter corners where daylight and city views create the informal atmosphere the collaboration intent requires.

Specification clauses driven

  • M2.08 Lighting control — daylight-linked dimming at perimeter zones
  • A3.01 Ceiling height — maximised at perimeter (no bulkhead drop)
  • Layout principle — drives FF&E and partition positioning (Cushman layout)

Evidence & approvals

  • Cushman FF&E layout Rev A — workstations at perimeter confirmed
  • Lambourne Vance daylight factor analysis — 2.5% average at desk height
  • Trenholme section drawing — ceiling soffit maintained at perimeter
Captured: 13 May 2026Signed off
DESIGN INTENT SIGN-OFF

Approved by Tenant, Architect & Contractor

All twelve design intent items reviewed and signed off by the parties responsible for the design decisions they represent. This document becomes the reference point for all downstream substitution, VE and site decisions.

Design Intent — NG-DI-001 Rev 1 — Signed Off

TENANT WORKPLACE DIRECTOR
F. Crowne-Hewitt
Wexley & Crowne LLP
22 May 2026
TENANT PROJECT MANAGER
P. Sandhu
Cushman Workplace
22 May 2026
ARCHITECT — LEAD DESIGNER
G. Trenholme
Trenholme Architects
22 May 2026
M&E ENGINEER
H. Lambourne
Lambourne Vance Engineers
22 May 2026
DESIGN MANAGER
A. Pereira
Built AI Ltd
22 May 2026
PRE-CON LEAD
D. Marchetti
Built AI Ltd
22 May 2026

Disclaimer: This Design Intent document captures the rationale behind specification decisions as discussed and agreed during pre-construction workshops. It does not constitute a design brief, an architectural specification or an instruction to vary the contract scope. All design decisions referenced herein are documented in the Project Specification (NG-PS-001) and are subject to the competent review obligations of the appointed designers and the Employer's approval processes.

BuiltAI
DESIGN INTENT — COMPLETE

12 intents. Every "why" recorded.

When a supplier proposes an alternative, when a VE discussion starts, when a site decision needs making quickly — the answer to "does this serve the intent?" is in this document. Not in someone's memory of a meeting that happened three months ago.
INTENT ITEMS
12
SPEC CLAUSES LINKED
38
WORKSHOPS HELD
4
SIGN-OFF PARTIES
6
built-ai.io · The Pre-Con Pack™ · DI · Design Intent © 2026 Built AI Ltd · NG-DI-001 Rev 1
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