Attaché Global
Historic photograph of Balsam’s Restaurant at 17 Hertford Street

17 Hertford Street · archival image

A proposal from Attaché Global

17 Hertford
Street

An invitation to explore a Fendi Café and Managed Apartments by Fendi in the heart of Mayfair.

Attaché Global×FendiProposed collaboration
Explore the proposition

The opportunity

One address. Two complementary expressions of the house: a public ritual at street level and a private residential experience above.

Fendi Café · concept campaign

A new ritual
for Mayfair.

Six perspectives on how Fendi’s design identity could extend into hospitality at 17 Hertford Street.

Concept visualisation of the proposed Fendi Café: The café as a Mayfair welcome
01 / 06
01

The café as a Mayfair welcome

A street-level expression shaped by light, material and service.

Concept visualisation — proposed collaboration, subject to Fendi approval. Visible Fendi or FENDI CASA applications are conceptual, not approved brand executions.

The proposed experience

Encounter.
Then belonging.

The café introduces the house through hospitality. The apartments extend that relationship through residence, service and long-term care.

Spatial study

From concept
to arrangement.

The drawing explores a possible street-level café arrangement and the relationship between seating, service, circulation and access.

Indicative proposed café floor plan showing seating, service areas, circulation and commercial entrances
Proposed café layout · indicative design studySupplied concept material. The drawing does not confirm final dimensions, capacity, access arrangements, approvals or furniture specification.
01 · Managed Apartments by Fendi

Designed once.
Cared for continuously.

A coherent residential experience could unite curated interiors with professional management, planned maintenance and discreet resident support.

  • Design stewardship
  • Managed arrival
  • Resident services
All services are proposals, subject to the operating model, building constraints and approvals.

Managed Apartments · spatial studies

Read the plan.
Reveal the room.

Four supplied architectural studies paired with proposed interior atmospheres. Drag each gold handle across the drawing.

Spatial Study 01

Living room

Drag across the drawing to reveal a proposed interior atmosphere over the indicative plan.

Indicative architectural floor plan, Spatial Study 01
Proposed concept CGI of a basement living roomProposed Concept CGI
Spatial Study 01

Pairing 01 communicates possible look and feel only. It does not confirm a floor assignment, layout, dimension, room count, furniture schedule, specification or Fendi approval.

Spatial Study 02

Living room

Drag across the drawing to reveal a proposed interior atmosphere over the indicative plan.

Indicative architectural floor plan, Spatial Study 02
Proposed concept CGI of a second-floor living roomProposed Concept CGI
Spatial Study 02

Pairing 02 communicates possible look and feel only. It does not confirm a floor assignment, layout, dimension, room count, furniture schedule, specification or Fendi approval.

Spatial Study 03

Bedroom

Drag across the drawing to reveal a proposed interior atmosphere over the indicative plan.

Indicative architectural floor plan, Spatial Study 03
Proposed concept CGI of a second-floor bedroomProposed Concept CGI
Spatial Study 03

Pairing 03 communicates possible look and feel only. It does not confirm a floor assignment, layout, dimension, room count, furniture schedule, specification or Fendi approval.

Spatial Study 04

Bedroom

Drag across the drawing to reveal a proposed interior atmosphere over the indicative plan.

Indicative architectural floor plan, Spatial Study 04
Proposed concept CGI of a fourth-floor bedroomProposed Concept CGI
Spatial Study 04

Pairing 04 communicates possible look and feel only. It does not confirm a floor assignment, layout, dimension, room count, furniture schedule, specification or Fendi approval.

Arrival & interior finishes

A discreet threshold.
A coherent interior language.

The proposed residential entrance separates private arrival from the café. The bathroom illustrates a possible approach to stone, timber, metalwork and lighting.

The CGIs suggest a design direction only. They do not confirm the final layout, dimensions, finishes or furniture specification. Furniture is illustrative except where the Peekasleep bed and Cleo armchair are identified. Any visible Fendi or FENDI CASA lettering is conceptual branding—not a verified retail product or approved brand application.

Concept material palette of green leather, ivory textile, stone, walnut and brass

A shared material language

Recognisable,
never theatrical.

A controlled palette could connect the two experiences without compromising their different roles: social and visible below; calm and private above.

Concept visualisation · not an approved specification

Market context

Why people
come here.

Mayfair’s draw is a mix of hotels, clubs, galleries, restaurants and two royal parks. Residents, hotel guests, local professionals and visitors give the streets a rhythm that changes by hour and by season.

The figures below are published measures, each labelled for what it actually counts. Station and national statistics describe the wider area and the country—not pedestrian volumes outside the building. No footfall count exists for Hertford Street itself, so none is given.

29.8m

Green Park station

Annualised entries and exits, 2024. A station count, not a pedestrian count.

Transport for London, Annual Station Counts 2024
3.5m

Hyde Park Corner station

Annualised entries and exits, 2024. A station count, not a pedestrian count.

Transport for London, Annual Station Counts 2024
42.6m

Visits to the UK

Overseas residents’ visits in 2024, with an estimated £31.6bn of spending. A national measure.

ONS, Travel trends: 2024
10.9m

Green Park visits

Estimated annual visits to the park in the 2014 survey year; more recent park-level estimates are not published.

The Royal Parks / Statista, 2014 survey

Seasonality

Demand moves
through the year.

Both charts show published London and UK demand patterns as a relative index. They are context for planning rhythm and staffing thinking—not predicted covers, bookings or revenue.

Café · visitor-led demand pattern
Index, strongest month = 100. Measured as overseas residents’ visits to the UK, by month. ONS, Overseas travel and tourism, monthly (2023).
Apartments · stay and spending pattern
Index, strongest month = 100. Measured as overseas residents’ spending in the UK, by month. ONS, Overseas travel and tourism, monthly (2023).

For comparison, a sample of branded full-service central London hotels recorded 2025 occupancy peaking in July at 92.7% and reaching its lowest point in January at 66.5%, with full-year occupancy of 84% (Cushman & Wakefield, London Market Spotlight FY 2025).

Published price bands

Where the market
already sits.

Ranges taken from published Mayfair menus and advertised apartment rates. They describe the market a café and managed apartments would sit within.

Café · per head
Morning · pastry and coffee
from about £5–£15
All-day café lunch
about £25–£45
Evening minimum spend, comparable Mayfair café
£20 per person
Formal Mayfair set lunch, for reference
from about £98
Published Mayfair menu comparables, reviewed September 2026. Not a proposed tariff.
Apartments · per stay
One bedroom, per night
from about £305
Two bedroom, per night
from about £470–£550
Longer-stay Mayfair apartment, per night
from about £500, seven-night minimum
Per week
from about £1,960 plus VAT
Published rates advertised by Mayfair serviced-apartment operators, reviewed September 2026. Not a proposed tariff.

Published market context only. Nothing here is a forecast, projection, guarantee or proposed tariff. Any pricing would follow design, service specification, operating model and commercial agreement.

The commercial centrepiece

“By renting, we can control the brand better.”
Managed rental

One accountable operator

Consistent interiors, planned replacement cycles, defined service standards and a direct relationship with residents.

Individual sales

Fragmentation over time

Personal fit-out choices, variable participation in services and slower intervention when standards slip.

Rental is an enabling structure, not a guarantee. Brand control depends on robust agreements, defined operating standards, active oversight and sustained investment.

Why this address

A quieter Mayfair,
within a luxury ecosystem.

Explore the renowned restaurants and luxury shopping surrounding 17 Hertford Street first, with hotels, culture, parks and transport available through the supporting filters.

17
Hertford Street centred
Grade II
Listed address
Mayfair
Luxury hospitality cluster
Loading London map
17
Hertford Street51.5054406, -0.1487509

Basemap Esri, HERE, Garmin, © OpenStreetMap contributors · destination selection and pins by Attaché Global

Walking times are approximate and rounded from public pedestrian-route references. Station figures elsewhere remain station usage counts, not pavement footfall.

The Mayfair context

An address already fluent in service.

Established hotels and private clubs place the building within a mature luxury-hospitality setting—not a destination waiting to be invented.

Cambridge House on Piccadilly

Change, with status made clear

Completed

Carrington Street walkway

Reopened October 2025.

Confirmed development

Cambridge House

Currently taking bookings for 1 February 2027; delivery remains subject to change.

Public-realm proposal

Shepherd Market streets

Consultation is not completion.

Context only. These projects are not a forecast of value, demand or returns.
Archival views of 17 Hertford Street
Archival views · dates unconfirmed

The building’s provenance

Hospitality is already part of its memory.

No. 17 was built around 1768 by Henry Holland the elder, with his son and John Eldridge. The younger Henry Holland lived here after his marriage in 1773.

The building later accommodated flats and a ground-floor restaurant. Its listing records a mid-twentieth-century restaurant frontage; supplied archive material connects the corner with Balsam’s Restaurant.

c.1768Construction1773Holland residenceMid C20Restaurant use1986Grade II listing
Attaché Global entrance on Hertford Street

The invitation

Let us explore what this address could become.

Attaché Global invites Fendi to test the creative, operational and commercial potential together.

  1. 01Brand fit
  2. 02Design direction
  3. 03Operating model
  4. 04Feasibility & approvals
  5. 05Commercial terms
This is a proposal for discussion. It does not represent an approved partnership, design or commitment by Fendi.

References

Grounded in the address.

Research reviewed 16 September 2026. The supplied heritage statement, planning location plan and archival material remain the primary building-specific sources.

  1. 01
    Historic England

    17 Hertford Street, List Entry 1357095

  2. 02
    Westminster City Council

    Mayfair Conservation Area guidance

  3. 03
    The Shepherd Mayfair

    Official hotel information

  4. 04
    Auberge Resorts Collection

    Cambridge House project information

  5. 05
    Reuben Brothers

    Piccadilly Estate and Carrington Street

  6. 06
    Transport for London

    Annual Station Counts 2024 — station entries and exits

  7. 07
    Office for National Statistics

    Overseas travel and tourism, monthly — visits and spending by month

  8. 08
    Office for National Statistics

    Travel trends: 2024 — annual visits and spending

  9. 09
    Cushman & Wakefield

    London Market Spotlight FY 2025 — hotel occupancy seasonality

  10. 10
    The Royal Parks

    Annual Report and Accounts — park visitor estimates

  11. 11
    Rosewood Hotels

    GSQ Mayfair all-day menu 2026 — published café pricing

  12. 12
    Serviced London Apartments / Portland Brown

    Published Mayfair serviced-apartment rates