Locker Specification Planning UK: Choosing Sizes, Layouts, Materials and Access Systems

Locker specification planning helps architects, facilities managers, contractors and procurement teams choose lockers that fit the building, suit the users and remain practical to manage after installation.

A good locker specification is not just a product choice. It is a written project brief covering the users, stored items, required capacity, usable compartment size, overall locker dimensions, material, finish, base and top treatment, ventilation, access control, accessibility, cleaning, maintenance, installation constraints and future expansion. Planning these requirements before ordering makes the finished locker area easier to use and manage over its lifetime.

This page focuses on what should be written into a locker specification. For the complete room-planning process, use our Locker Planning UK guide. For managed keys, PINs, RFID credentials and authorised override, see Locker Access Control Systems UK.

Quick Answer: What Should a Locker Specification Include?

A locker specification should include the user requirement, number of compartments, allocation model, usable compartment size, overall locker dimensions, material, finish, stand or plinth arrangement, top treatment, ventilation, lock type, aisle and door-clearance constraints, accessibility, numbering, installation conditions, cleaning and maintenance access, and allowance for future demand.

Specification area	What to decide	Why it matters
Dimensions	Height, width, depth and compartment size	Controls capacity and usability
Layout	Rows, aisles, benches and door swing	Prevents congestion and blocked access
Materials	Steel, laminate, plastic or wet-area materials	Affects durability and cleaning
Ventilation	Door vents, airflow and drying needs	Reduces odour and damp storage issues
Locks	Key, coin, combination, RFID or smart access	Controls security and administration
Occupancy	Assigned, shared, hot locker or temporary use	Prevents overbuying or under-capacity
Maintenance	Access for repairs, cleaning and replacement	Reduces long-term disruption

Why Locker Specification Planning Matters

Lockers are often specified too late. This creates problems during installation and daily use. Doors can clash with benches. Aisles can become too narrow. Wet-area lockers may be placed in damp environments without the right material. Locks may be chosen without considering lost keys, shared use or staff turnover.

A clear specification reduces these risks. It gives contractors a practical brief, procurement teams a measurable standard and facilities teams a locker system that can be cleaned, repaired, audited and expanded.

Locker Dimensions and Compartment Size

Locker dimensions should be chosen around what users need to store. Staff lockers, school lockers, PPE lockers, gym lockers and industrial lockers all need different compartment sizes.

Locker depth	Typical use	Planning note
300 mm	Small personal items, schools, compact spaces	Useful where space is limited
450 mm	Workplace lockers, bags, coats and daily storage	Common general-purpose depth
600 mm	PPE, uniforms, boots and larger equipment	Needs more aisle and door clearance

Use the Locker Sizes UK guide for overall and compartment dimensions. Where front-to-back projection is the main constraint, use the Locker Depth Guide UK.

Layout, Aisles and Door Clearance

The locker layout must allow users to open doors, collect items and move safely through the space. A good layout considers aisle width, bench position, door swing, turning space and the number of people using the area at peak times.

Back-to-back locker rows can increase capacity, but they need enough circulation space. Lockers beside benches need extra clearance so users do not block each other. School and workplace changing areas also need planning for peak demand.

For detailed working-space calculations, use the Locker Aisle Width Guide UK. For door movement and opening space, use the Locker Door Clearance Guide UK. For the complete room-planning sequence, return to Locker Planning UK.

Material Selection

Material choice should match the environment. A dry office does not need the same locker material as a swimming pool, changing room, factory or healthcare area.

Material type	Best suited to	Specification concern
Steel lockers	Offices, schools, warehouses and general workplaces	Durable and cost-effective for dry areas
Laminate lockers	Leisure, education and premium changing rooms	Good appearance and moisture resistance depending on grade
Plastic or wet-area lockers	Pools, spas and washdown areas	Better suited to damp or corrosive environments
Heavy-duty lockers	Industrial, construction and high-wear sites	Useful where impact and rough use are likely

For a broader comparison of steel, laminate and plastic options, see Locker Materials Explained.

Colours and Finishes

Specify carcase and door finishes separately where required. Colour can support corporate interiors, school schemes, departmental zoning and visual identification, but it also matters when future locker additions need to match the original installation.

• Carcase colour.
• Door colour or colour sequence.
• Powder-coated or laminate finish.
• Department, year-group or zone colour coding.
• Contrast with locker numbering or identification.
• Requirement to match an existing locker bank.

Use Locker Colours and Finishes UK for colour selection and matching guidance.

Stands, Plinths and Sloping Tops

The base and top arrangement affects installed height, cleaning access and how the locker bank fits the room. State whether the project requires floor-standing lockers, open stands, plinths, seat stands, flat tops or sloping tops, and confirm compatibility with the selected locker range.

See Locker Stands, Plinths and Sloping Tops for the detailed specification choices.

Ventilation and Airflow

Ventilation is important where users store clothing, shoes, PPE, towels or damp items. Door vents, perforated sections and sensible room airflow help reduce odour, trapped moisture and poor drying conditions.

Ventilation should be planned with the room use. A dry office locker area may only need standard vents. A sports or industrial changing room may need stronger airflow and more robust cleaning routines.

Fire Considerations

Locker specifications should not block fire exits, escape routes, access panels or safety equipment. Fire considerations are usually about placement, materials, route protection and avoiding obstruction.

In higher-risk areas, the specification should be checked against the building fire strategy. Lockers should not create hidden storage risks in corridors, plant areas or escape routes.

Wet and Dry Area Suitability

Wet and dry areas need different locker decisions. Dry workplaces can often use standard steel lockers. Wet changing rooms, leisure centres and poolside areas may need moisture-resistant materials, suitable fixings and lock systems that tolerate humidity.

For wet or humid environments, state the exposure clearly and confirm that the locker body, fixings and locking system are suitable for those conditions before ordering.

Lock Selection and Access Systems

The lock is part of the locker specification. It affects administration, lost key handling, user behaviour and long-term running cost.

Access type	Best for	Planning issue
Key locks	Assigned lockers and simple staff storage	Needs key control and replacement process
Combination locks	Sites wanting fewer physical keys	Needs code reset procedure
Coin locks	Leisure centres and public changing rooms	Needs coin/token policy
RFID locks	Schools, workplaces and controlled access sites	Needs credential management
Smart locker access	Hybrid workplaces and shared-use estates	Needs software, reporting and administration

Use the Locker Locking Systems guide to compare key, hasp, coin, combination and electronic access. For managed credentials, override access and administration, use Locker Access Control Systems UK. Where allocation and day-to-day operation are the main issue, see Locker Management Systems UK.

Occupancy Forecasting

Locker capacity should be based on real occupancy, not only total headcount. This is especially important in hybrid workplaces, schools, shift-based sites and shared-use facilities.

Planning should consider peak usage, rotating staff, temporary users, visitors, seasonal demand and future workforce changes. A site with 200 staff may not need 200 personal lockers if shared-use and hot locker systems are managed properly. Another site may need more lockers than headcount if PPE, uniforms or department separation are required.

Use How Many Lockers Do You Need? Capacity Planning Guide to calculate the required quantity. For ongoing utilisation, vacancy and shared-use analysis after installation, see Locker Occupancy Management Systems UK.

Future Expansion Planning

A good specification leaves room for change. Extra users, new departments, altered shift patterns and changing access systems can all affect locker demand.

Future expansion planning may include spare wall space, modular locker banks, standardised lock footprints, matching finishes and consistent compartment sizes. This makes later additions easier and avoids mismatched locker areas.

Installation and Delivery Constraints

The specification should record site conditions that could change the correct locker construction, dimensions or installation method. Check external delivery access, unloading, doorways, corridors, stairs, lifts, finished floor condition, wall construction, fixing requirements, concealed services, working space and any live-site restrictions before ordering.

For the complete site-preparation process, see Locker Installation Planning UK.

Cleaning Access

Cleaning access is often missed in locker specifications. Lockers should be positioned so floors, walls, bases and adjacent areas can be cleaned without unnecessary obstruction.

In changing rooms, schools, healthcare areas and industrial workplaces, cleaning access should be treated as a core specification issue. Plinths, stands, sloping tops and layout spacing can all affect cleaning routines.

Maintenance Access

Facilities teams need access to repair locks, replace doors, tighten fixings, inspect frames and manage damaged compartments. A locker system that looks efficient on plan can become expensive if maintenance access is poor.

Specifications should allow access to lock mechanisms, hinges, end panels, fixing points and replacement parts. If an existing locker estate is being upgraded rather than replaced, use the Locker Lock Replacement Guide UK to check physical lock compatibility before standardising replacements.

Accessibility Planning

Accessible locker planning should consider reach height, aisle access, door operation, lock usability, wheelchair turning space and bench position. Not every locker needs to be identical. However, the specification should include suitable accessible options for the users and building type.

Use Locker Accessibility and DDA Planning UK for detailed reach, approach, lock-operation and inclusive-layout considerations.

Locker Specification Checklist

• Confirm user groups and storage needs.
• Choose locker height, width, depth and usable compartment size.
• Plan aisle width, door clearance and bench spacing.
• Select materials for dry, damp, wet or high-wear areas.
• Specify carcase and door colours or finishes.
• Specify stands, plinths, seat stands or sloping tops where required.
• Confirm ventilation and airflow requirements.
• Check fire routes, escape routes and obstruction risks.
• Select the right lock or access system.
• Forecast occupancy and peak demand.
• Allow for future expansion.
• Plan cleaning access and maintenance access.
• Include accessible locker positions and suitable reach heights.
• Record numbering, key, credential and handover requirements.
• Confirm delivery access, floor and wall conditions, fixing requirements and installation constraints.

Example Locker Specification Schedule

A project schedule does not need to be complicated, but it should make the important requirements explicit. Replace the example entries below with the actual project requirement and manufacturer-confirmed specification.

Field	Project requirement
Location	Building, floor, room or department
User group	Staff, pupils, members, visitors or other defined users
Stored items	Clothing, bags, PPE, books, equipment or other requirement
Quantity	Required usable compartments plus justified spare provision
Allocation	Assigned, shared, temporary or mixed
Dimensions	Required overall and usable compartment dimensions
Material	Required locker construction for the environment
Finish	Carcase and door colour or finish
Base/top	Floor standing, stand, plinth, seat stand, flat or sloping top
Lock	Access method, operating mode and management access
Numbering	Required numbering or asset-identification format
Accessibility	Required accessible positions and operating considerations
Installation	Delivery, fixing, access and site constraints
Handover	Keys, codes, credentials, spare parts and records required

Common Locker Specification Mistakes

• Choosing a product before defining what users need to store.
• Using total headcount as the locker quantity without checking simultaneous demand.
• Specifying only external dimensions and ignoring usable compartment size.
• Ignoring door swing and user space in the room layout.
• Choosing material without defining the environment.
• Leaving colours, stands, plinths or sloping tops until after the main order.
• Choosing locks without a lost-key, reset or authorised-override process.
• Failing to include accessible locker positions and access space.
• Ignoring delivery routes and installation conditions.
• Creating unnecessary variation in locker and lock standards across one estate.

Related Locker Specification Guides

Use these specialist guides where the project needs more detailed calculations or product-selection information.

• Locker Planning UK
• Locker Sizes UK
• Locker Depth Guide UK
• Locker Aisle Width Guide UK
• Locker Door Clearance Guide UK
• Locker Materials Explained
• Locker Colours and Finishes UK
• Locker Stands, Plinths and Sloping Tops
• Locker Access Control Systems UK
• Locker Accessibility and DDA Planning UK
• Locker Installation Planning UK

Conclusion

Locker specification planning gives a project a clear technical and operational foundation. It helps teams choose the right locker sizes, materials, layouts and access systems before installation begins.

The strongest specifications consider how the lockers will be used every day. They plan for users, cleaning, maintenance, access control, occupancy and future expansion. This creates a locker system that works for the building, the facilities team and the people using it.

Once the project brief is defined, compare it with our commercial locker ranges. Check the selected manufacturer’s current dimensions, colours, lock options and installation requirements before the order is finalised. For site preparation, use the Locker Installation Planning UK guide.

FAQ: Locker Specification Planning UK

What is locker specification planning?

Locker specification planning is the process of defining the users, storage requirement, quantity, dimensions, material, finish, locking system, accessibility, installation and long-term management requirements before lockers are ordered.

What size lockers should I specify?

Start with the largest items users regularly need to store and define the usable compartment space required. Then check the overall locker dimensions against the room, door opening, aisle space and installation constraints.

Should locker quantity be based on total headcount?

Not automatically. The required quantity depends on the allocation model, simultaneous demand, shift overlap, temporary users, shared use, spare capacity and expected future change as well as total headcount.

What locker material should I specify?

Choose the material according to the environment, expected wear, cleaning method, moisture exposure and required appearance. Steel, laminate, plastic and heavy-duty lockers suit different applications.

Should locker locks be specified early?

Yes. Lock choice affects key or credential administration, authorised override, shared or assigned use, maintenance, replacement and long-term operating cost, so it should form part of the main specification.

Why should installation conditions be included in a locker specification?

Delivery routes, doorway and lift sizes, floor condition, wall construction, fixing requirements, concealed services and live-site restrictions can affect which lockers can be delivered and how the installation should be planned.

Why is maintenance access important?

Maintenance access allows facilities teams to inspect hinges and fixings, repair or replace locks and doors, clean around the locker bank and keep the installation serviceable without unnecessary disruption.