Category A fit-out works
Rules of Thumb, Guidelines for building services (5th Edition) BG 9/2011, by Glenn Hawkins, published by BSRIA in 2011, states: ‘Category A fit-out works extend central services out on to floor plates and provide a background for Category B works. Category A works comprise services, life safety elements and basic fittings and finishes for the operation of lettable work space, including:
- Suspended ceilings
- Raised floors and skirtings
- Cooling and heating systems
- Office ventilation systems
- Open plan base lighting solution
- Life safety systems, such as fire alarms, sprinklers and emergency lighting
- Distribution boards
- Office carpet and floor boxes
- Blinds
- Basic statutory signage
- Basic security systems and wireways’
--BSRIA
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
A case study and a warning to would-be developers
Creating four dwellings for people to come home to... after half a century of doing this job, why, oh why, is it so difficult?
Reform of the fire engineering profession
Fire Engineers Advisory Panel: Authoritative Statement, reactions and next steps.
Restoration and renewal of the Palace of Westminster
A complex project of cultural significance from full decant to EMI, opportunities and a potential a way forward.
Apprenticeships and the responsibility we share
Perspectives from the CIOB President as National Apprentice Week comes to a close.
The first line of defence against rain, wind and snow.
Building Safety recap January, 2026
What we missed at the end of last year, and at the start of this...
National Apprenticeship Week 2026, 9-15 Feb
Shining a light on the positive impacts for businesses, their apprentices and the wider economy alike.
Applications and benefits of acoustic flooring
From commercial to retail.
From solid to sprung and ribbed to raised.
Strengthening industry collaboration in Hong Kong
Hong Kong Institute of Construction and The Chartered Institute of Building sign Memorandum of Understanding.
A detailed description from the experts at Cornish Lime.
IHBC planning for growth with corporate plan development
Grow with the Institute by volunteering and CP25 consultation.
Connecting ambition and action for designers and specifiers.
Electrical skills gap deepens as apprenticeship starts fall despite surging demand says ECA.
Built environment bodies deepen joint action on EDI
B.E.Inclusive initiative agree next phase of joint equity, diversity and inclusion (EDI) action plan.
Recognising culture as key to sustainable economic growth
Creative UK Provocation paper: Culture as Growth Infrastructure.
Futurebuild and UK Construction Week London Unite
Creating the UK’s Built Environment Super Event and over 25 other key partnerships.
Welsh and Scottish 2026 elections
Manifestos for the built environment for upcoming same May day elections.
Advancing BIM education with a competency framework
“We don’t need people who can just draw in 3D. We need people who can think in data.”

























Comments
Category A fit-out works refer to a specific level of interior construction and finishing that is carried out within a commercial or office space before it is leased or occupied by a tenant. These works typically focus on creating a basic, functional, and visually neutral environment, providing a clean canvas for tenants to customize according to their specific needs and preferences. Category A fit-out works are usually undertaken by the building owner or developer. Here's an overview of what Category A fit-out works may involve:
- Installation of raised floors: Raised access floors are commonly used in commercial spaces to accommodate cabling and utility distribution beneath the floor surface.
- Suspended ceilings: Basic suspended ceiling systems are often installed to hide utilities and provide a uniform appearance.
- Installation of basic HVAC systems: Heating, ventilation, and air conditioning systems are installed to provide climate control within the space.
- Lighting and electrical outlets: Basic lighting fixtures and electrical outlets are provided to meet standard requirements.
- Fire safety systems: Installation of fire alarms, emergency lighting, and other necessary fire safety equipment.
- Basic wall finishes: Painting or applying a neutral-colored finish to walls to provide a clean appearance.
- Basic floor finishes: Installation of basic floor coverings such as carpet tiles or vinyl flooring.
- Doors and partitions: Basic internal doors and partition walls to create separate areas.
- Basic washroom facilities: Installation of basic toilet facilities with necessary plumbing and fixtures.
- Basic building management systems: Implementation of basic systems for monitoring and managing utilities and security.
The primary goal of Category A fit-out works is to create a functional and presentable space that meets standard requirements. The tenant who leases the space can then proceed with Category B fit-out works, which involve customization and enhancement of the space to align with their specific needs, branding, and design preferences. Category B fit-out works often include aspects such as specialized lighting, branding elements, custom partitioning, meeting rooms, breakout areas, and more.
It's important for both building owners and tenants to have a clear understanding of what is included in Category A fit-out works, as well as the transition to Category B, to ensure that the final space meets their expectations and requirements.