Offsite Construction Solutions

Provides a simple, low-cost way to achieve your offsite solution needs. You can buy or hire offsite solutions that are designed and manufactured to your particular specification.

This agreement offers an alternative to a traditionally built environment. It provides a complete ‘turn key’ package solution, which means you can use this agreement to access everything you need for your offsite construction solution. 

The framework offers both ‘3D volumetric modular’ which refers to entire units or rooms being built to a ‘finish’ in offsite factories and craned into place on site and also ‘2D panelised’ which refers to individual walls and floors being built at offsite facilities and then erected on site. 

Suppliers can manufacture solutions off site and then transport them to site for installation, reducing disruption and lead time.

The services are provided both nationally or locally for both permanent and temporary buildings.

This agreement has 6 lots and  a number of sub-lots. All of the lots and sub-lots are listed in the products and suppliers section below.

If you are buying from lot 1 or its sub lots, you can ask for the DFE approved designs/drawings for classrooms, as stated in the specification for lot 1, by sending an email to offsite@gca.gov.uk

There is no maximum contract length. 

This agreement expires on 23 January 2027, except for Lot 5 – Defence which expires on 23 January 2030.

• uses technology and modern methods of construction (MMC) to promote innovation and efficiency
• supports sustainable industry, prompt payment, social value and carbon net zero initiatives
• applies the principles of the construction playbook
• offers a complete ‘turn key’ package solution, which means you can use this agreement to access everything you need for your offsite construction solution 
• we approve successful suppliers using a thorough selection process
• customers can choose from a variety of different contracts, these are:

• • New Engineering Contract (NEC)
  • Joint Contracts Tribunal (JCT)
  • Project Partnering Contract (PC2000)
  • Term Alliance Contract (TAC-1)

• provides value for money
• standard prices: this means that the maximum prices for this agreement are fixed for the first two years of the framework agreement contract
  • you may be able to ensure further price reductions by running a further competition or through early contractor involvement and effective risk management in direct award
• lot structure opens up opportunities to SMEs to bid for public sector contracts
• supports the use of whole life cost approaches in public sector spending (takes into account the total cost of a product or service over its lifetime)

Please read the 'How to buy' tab below for detailed instructions on how to find out which suppliers are on this framework.

You can buy services through further competition and direct award. If you choose to buy through further competition the length of the competition will depend on:

• your project requirements
• the size, scale and complexity of your project

Before buying from this agreement, you should decide which lot or lots is most suitable for your needs. If you are unsure, you can contact us by email for help.

When you have decided on the lot you want to buy from, you will need to:

1. register as an additional client user agreement (ACUA) by completing the ACUA registration document
2. return your registration document to us by email

When we have received your ACUA form, we will provide you with a unique reference number. You must reference your ACUA number on all communications with supplier alliance members.

There is no joining fee and no commitment, even after registering.

Choosing your contract

All the commonly used procurement routes, tendering methods, payment arrangements and standard forms of contract are available.

Boiler-plate clauses are included for things such as GDPR and intellectual property rights. You have the freedom to include additional contract changes at the further competition stage.

The contract types available include:

• NEC 3 or 4: provides a wide range of project management contracts and ensures users complete projects on time, on budget and to the required standards
• joint contracts tribunal (JCT) provides a suite of standard contract forms which set out the responsibilities of all parties within the construction process such as who will complete the work, when they will complete it by and for how much 
• PPC2000: offers a single contractual hub, allowing all team members to ‘contract as a team’ on identical terms
• term alliance contract (Tac-1): provides any type or size of works, services or supplies
• Scottish building contract committee (SBCC): where the work involved is simple and designed by or on behalf of the employer and uses the JCT forms wherever possible

You should check your own internal policies and processes to make sure they follow your standard operating procedures.

Crown Commercial Service (CCS) became Government Commercial Agency (GCA) on 1 April 2026. Documents published before this date may still refer to CCS. All contract documents remain valid for existing and new contracts, and there are no changes to how you work with us.

1. RM6184 Buyer guide V2.2
2. RM6184 Frequently asked questions V1.3
3. RM6184 Offsite construction solutions framework alliance contract V1.2
4. RM6184 Award notification form v2.0
5. RM6184 Additional client user agreement v1.5
6. RM6184 Planning frequently asked questions v1.0
7. RM6184 Registration form V1.2
8. RM6184 Schedule 10 form of additional client notice v1.0
9. RM6184 Standard boilerplate amendments JCT design build with or without quantities intermediate v1.0
10. RM6184 Standard boilerplate amendments JCT minor works v1.0-1
11. RM6184 Standard boilerplate amendments NEC3 v1.0
12. RM6184 Standard boilerplate amendments NEC4 v1.0
13. RM6184 Standard boilerplate amendments PPC2000 v1.0
14. RM6184 Standard boilerplate amendments TAC v.1.0
15. RM6184 Offsite construction solutions specification V1.2
16. RM6184 Pricing guide draft v2.1