skip to main content
Subcontractors Contact Us
close button
Logo Light Logo Dark Logo Sticky Logo Mobile Logo
search button
  • Who We Are

    Our Story

    We are a family of builders building amazing spaces across the US, Canada, UK, Ireland, and the Netherlands.

    Learn More >

    History

    Founded in 1971, we have grown into an organization made up of over 5,700 employees across 54 offices.

    Learn More >
    • Safety
    • Innovation
    • Quality
    • Compliance
    • Awards
    • Corporate Responsibility
  • What We Do

    Projects

    ST. PATRICK`S CATHEDRAL

    St. Patrick’s Cathedral, a New York City landmark building and one of the most revered Catholic Churches in the United States, underwent a major restoration and conservation project.

    Learn More about this project >
    View All Projects >

    Sectors

    Our Focus Areas

    • Aviation
    • Broadcast-Media
    • Building Repositioning
    • Corporate Base Building
    • Corporate Interiors
    • Corrections
    • Cultural/Religious
    • Education
    • Financial
    • Government
    • Healthcare
    • Hospitality
    • Industrial
    • Justice
    • Law
    • Life Sciences
    • Mission Critical
    • Multi-Unit Residential
    • Public Safety
    • Retail
    • Sports & Entertainment
    • Technology
    View all Sectors >

    Expertise

    • Building / Site Evaluation
    • Construction Management
    • Construction Procurement Solutions
    • Elevator Construction Consultants
    • Enterprise Solutions
    • Facilities Construction Services
    • Mass Timber Construction
    • Preconstruction
    • Sustainability & Wellness
    • Technology & Innovation
    • Virtual Design & Construction
    Learn more about our Expertise >
  • People

    Careers

    No matter the type of project, complexity or client, one thing remains constant—people do the work. Learn more about our career opportunities.

    Learn More >

    Leadership

    Meet the experts who lead our people and organization.

    Learn More >

    Community

    We care about each other and are committed to making a positive impact where we live and where we work.

    Learn More >
  • News

    STOBG In The News

    Stay informed and stay connected. View the latest company announcements, employee achievements, and leadership highlights.

    Learn More >

    STOBG Insights Magazine

    Get inspired by the latest issues on project renovations, designs, company commemorations, and collaborations.

    • Read the Magazine>
    More News >

    STOBG Podcast

    Connect and listen to construction professionals and leaders one conversation at a time.

    Learn More >

    Thought Leadership

    What’s next in construction? From trends to data, find out more from our experts.

    Learn More >
  • Companies
    • Abbott Construction
      Abbott Construction Abbott Construction company logo
    • Ajax
      Ajax Ajax company logo
    • BCCI
      BCCI BCCI company logo
    • Govan Brown
      Govan Brown Govan Brown company logo
    • Layton
      Layton Layton company logo
    • LF Driscoll
      LF Driscoll LF Driscoll company logo
    • STOMC
      STOMC STOMC company logo
    • Pavarini Northeast
      Pavarini Northeast Pavarini Northeast company logo
    • Pavarini McGovern
      Pavarini McGovern Pavarini McGovern company logo
    • RC Andersen
      RC Andersen RC Andersen company logo
    • Structure Tone
      Structure Tone Structure Tone company logo
    • Structure Tone International
      Structure Tone International Structure Tone International company logo
    • Structure Tone Southwest
      Structure Tone Southwest Structure Tone Southwest company logo
  • Contact
  • Find Us
  • WHO WE ARE
    • Our Story
    • History
    • Safety
    • Innovation
    • Quality
    • Compliance
    • Awards
    • Corporate Social Responsibility
  • WHAT WE DO
    • Projects
    • Sectors
      • Broadcast & Media
      • Building Repositioning
      • Corporate Base Building
      • Corporate Interiors
      • Corrections
      • Cultural/Religious
      • Education
      • Financial
      • Government
      • Healthcare
      • Hospitality
      • Industrial
      • Justice
      • Law
      • Life Sciences
      • Mission Critical
      • Multi-Unit Residential
      • Public Safety
      • Retail
      • Sports & Entertainment
      • Technology
    • Expertise
      • Building Repositioning
      • Building / Site Evaluation
      • Commissioning
      • Construction Management
      • Construction Procurement Solutions
      • Elevator Construction Consultants
      • Facilities Construction Services
      • Mass Timber
      • Preconstruction
      • Sustainability & Wellness
      • Technology & Innovation
  • PEOPLE
    • Careers
      • Apply
    • Leadership
    • Community
  • News
    • STOBG Insights
    • STOBG In The News
    • Podcast
    • Thought Leadership
  • Companies
    • Abbott Construction
    • Ajax Building Company
    • BCCI Construction
    • Govan Brown
    • Layton Construction
    • LF Driscoll
    • STO Mission Critical
    • Pavarini North East
    • Pavarini McGovern
    • RC Andersen
    • Structure Tone
    • Structure Tone International
    • Structure Tone Southwest
  • Contact
  • FIND US
back Button
84 Grosvenor Street - Building Repositioning Construction | Structure Tone International
Structure Tone is a global leader in construction management and general contracting services with offices located in the US, UK, and Ireland. Founded in 1971, the company is among the world’s top twenty construction companies worldwide, responsible for more than $3.5B in annual construction volume.
39873
wp-singular,projects-template-default,single,single-projects,postid-39873,wp-theme-onyx,wp-child-theme-onyx-child,vcwb,ajax_fade,page_not_loaded,,onyx child-child-ver-1.0.0,onyx-ver-1.4.1, vertical_menu_with_scroll,smooth_scroll,side_menu_slide_with_content,width_470,wpb-js-composer js-comp-ver-9.0.1,vc_responsive
P2076862 RT RGB 2000x900
P2145951 RT RGB 2000x900
P2076705 RT RGB 2000x900
P2087158 RT RGB 2000x900
P2145271 RT RGB 2000x900
project

84 Grosvenor Street

Located amongst the luxury flagship stores of Mayfair, 84 Grosvenor Street offers its tenants high-quality, modern, and sophisticated West End office accommodation.

 

Global real estate investor, developer and manager, Oxford Properties, enlisted Structure Tone to refurbish this Grade II listed property to deliver CAT A and CAT B customizable “plug and play” workspaces over 14,432sf.

Reception

Our team helped remodel the new, contemporary, ground-floor reception area, designed by award-winning architect Barr Gazetas, to incorporate warm limed oak timber clad walls, a new stair, and a lift lobby refurbished to include a DDA-compliant passenger lift. The updates also introduced a new, bespoke, brush-finished, brass sheet metal reception desk, full-height light walls, new automated and controlled LED lighting, access control, WI-FI connectivity and decorative brass and leather detailing, stone flooring enhancing the arrival experience even further.

Level 2

The fully fitted CAT B fit out of the 5,140sf second floor included Cat 6 communications wiring and WiFi, allowing tenant connectivity from Day 1. Designed in-house by Structure Tone’s Detail and Build interior designers, the modern, new space expanded on Barr Gazetas’ initial concepts. With refurbished Daikin VRF heating and cooling units, plus a single AC split system, within the boardroom areas to provide heating and cooling for the entire floor and new automated LED lighting, power and Fire alarm system incorporated into the buildings system.

Designed in a sophisticated colour palette with high-quality furnishings, the workspace includes a statement reception area, client coffee lounge facilities, meeting rooms, private offices, open desking, kitchen, and a corner boardroom overlooking Grosvenor St and New Bond St

Levels 3 & 4

The third and fourth floors have been completed to an enhanced CAT A+ fit out. Level 3 has a refurbished Daikin VRF system and level 4 incorporates a brand new VRF and AC system. Both floors have new automated LED lighting and fire alarm system incorporated into the building system. They offer full flexibility, with light-filled open spaces and fine views on to Mayfair’s fashionable streets. These Grade A office floors provide the perfect backdrop for modern day business.

Challenges

Many of the project’s challenges centred on ensuring the mechanical and electrical systems would fit into the space as designed. However, restricted by tight ceiling voids and immovable structural beams, our on-site designers coordinated with the design team and specialists to ensure mechanical pipework was installed as tight as possible to the soffit, followed by the electrical cable tray which was installed to avoid clashes with metal hangers supporting the new ceiling, pipework and linear grilles all whilst maintaining architectural intent.

Keen to minimise waste and protect budgets, our team made sure to thoroughly validate those systems to determine what was suitable to re-use and what items needed replacing/upgrading, as a result much of the second and third floor services required only minor repairs. What’s more, the new cooling and heating loads were significantly higher than the base build demand. We managed to overcome this challenge by supplementing the new VRF system with a conventional split in the large meeting rooms, working closely with the consultants and design team to enlarge the scope to account for these needs, resulting in a much more effective and efficient final outcome.

Teamwork

With a team skilled and experienced in elements of design and construction, we were able to partner with the consultants and client team to tackle any challenges that arose, from fibre installation issues and fire alarm upgrades to the roof and guttering repairs.

The result is an adaptable and elegant work environment that blends spacious open-plan working with agile workspaces. The design occupant density of the new space, in fact, is 1 person per 10 m2 at 12 l/s for each floor—perfect for collaborative working, important client meetings, or entertaining.

COMPANY

Structure Tone International

sectors

Building Repositioning

Corporate Interiors

services

Building Repositioning

Commissioning

Construction Management

Preconstruction

Virtual Design & Construction (VDC)

Architect

Barr Gazetas

Client

Oxford Properties Group

Location

84 Grosvenor Street, London W1K 3JY

SF

14,432

Contract

Design & Build

Architect

Barr Gazetas

Project Manager

Tuffin Ferraby Taylor

Primary Engineer

Furness Green Partnership

Quantity Surveyor

Tuffin Ferraby Taylor

contact us

related projects

Bloomsbury Quarter – 14 Sicilian Avenue
London, UK
Confidential Financial Client
New York, NY
JPMorgan Chase Global Headquarters
New York, NY
Bain & Company
Boston, MA
Pinterest
London, UK
Confidential Research & Advisory Firm
New York, NY
Indeed
Stamford, CT
Confidential Insurance Client
London UK
Confidential Legal Client
London, UK
FanDuel
New York, NY
View all

Our Family of Builders

  • Abbott Construction
  • Ajax
  • BCCI
  • Govan Brown
  • Layton Construction
  • LF Driscoll
  • STO Mission Critical
  • Pavarini North East
  • Pavarini McGovern
  • RC Andersen
  • Structure Tone
  • Structure Tone International
  • Structure Tone Southwest

Who We Are

  • Our Story
  • History
  • Leadership
  • Corporate Responsibility

Helpful Links

  • Careers
  • Projects
  • Sectors
  • Expertise
  • Subcontractors
  • CMiC Partner Collaboration Portal
  • Modern Slavery Statement

Industry Insights

  • Insights Magazine
  • Podcast
  • Thought Leadership

Contact Us

Locations

Business Development
bd@stobuildinggroup.com
Careers
careers@stobuildinggroup.com
Press
press@stobuildinggroup.com

SUBSCRIBE TO STOBG INSIGHTS MAGAZINE

  • message

 

STO Building Group (STOBG) is an equal opportunity employer. 

copyrights By continuing with this site you consent to the use of cookies.
Copyright STO Building Group (STOBG) 2026.
Privacy Policy | Terms of Use | Cookie Policy | Sitemap

Instagram
Facebook
LinkedIn
YouTube
Twitter
Podcast
Spotify

  • message

Privacy Rights Request Form

We are committed to protecting your personal information. You may use this form to submit a request regarding your personal data under applicable privacy laws. Depending on your location and relationship with STO Building Group (STOBG), you may have the right to request access to, correction or deletion of, or restrictions on how we use your data. We may contact you to verify your identity before processing your request.