Supplementary Development Agreement Template for England and Wales

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Key Requirements PROMPT example:

Supplementary Development Agreement

"I need a Supplementary Development Agreement to extend our development timeline by 12 months and add two additional retail units to our existing shopping center development project, with completion now expected by March 2025."

Document background
A Supplementary Development Agreement is utilized when parties need to amend their existing development arrangements while maintaining the core structure of the original agreement. This document type is commonly used in England and Wales when circumstances require modifications to development timelines, expansion of development rights, changes to payment terms, or updates to planning permissions. The agreement ensures all changes are legally binding while preserving the validity of the original development agreement. It's particularly relevant when project scope changes or unforeseen circumstances require formal contractual amendments.
Suggested Sections

1. Parties: Details of all parties to the agreement including registered addresses

2. Background: Context of the supplementary agreement and reference to original development agreement

3. Definitions: Key terms used throughout the agreement

4. Amendments to Original Agreement: Specific modifications to the original development agreement

5. Continuing Effect: Confirmation that original agreement remains in force except as modified

6. Costs: Allocation of costs related to the supplementary agreement

Optional Sections

1. Additional Development Rights: Used when granting extra development permissions or expanding the scope of development

2. Revised Payment Terms: Modified financial arrangements when payment structures are being altered

3. Extension of Time: Changes to development timeframes when project deadlines are being modified

Suggested Schedules

1. Schedule of Amendments: Detailed list of specific changes to original agreement

2. Updated Plans: Modified development plans or drawings

3. Revised Programme: Updated development timeline

4. Additional Planning Permissions: New or modified planning permissions

Authors

Alex Denne

Head of Growth (Open Source Law) @ Genie AI | 3 x UCL-Certified in Contract Law & Drafting | 4+ Years Managing 1M+ Legal Documents | Serial Founder & Legal AI Author

Relevant Industries
Relevant Teams
Relevant Roles
Industries

Law of Property Act 1925: Fundamental legislation governing real property in England and Wales, including legal estates, interests in land, and property transactions

Contracts (Rights of Third Parties) Act 1999: Legislation governing how third parties may enforce terms of a contract, relevant for development agreements involving multiple parties

Town and Country Planning Act 1990: Primary legislation controlling land development and use in England and Wales, including planning permission requirements

Planning and Compulsory Purchase Act 2004: Updates and supplements the planning system, including provisions for spatial planning and development control

Community Infrastructure Levy Regulations 2010: Regulations governing charges which local authorities can impose on new developments to support infrastructure

Section 106 Agreement Provisions: Planning obligations under the Town and Country Planning Act 1990, used to mitigate the impact of development projects

Building Regulations 2010: Statutory requirements for building work regarding safety, energy efficiency, and accessibility standards

Environmental Protection Act 1990: Framework for environmental protection including waste management and control of emissions

Housing and Planning Act 2016: Modern legislation introducing changes to planning and housing policy, including provisions for starter homes

Land Registration Act 2002: Legislation governing the registration of land ownership and interests in England and Wales

Local Government Act 1972: Framework for local authority powers and responsibilities in development matters

Construction (Design and Management) Regulations 2015: Health and safety regulations specific to construction projects

UK GDPR and Data Protection Act 2018: Data protection requirements affecting handling of personal information in development projects

Health and Safety at Work Act 1974: Primary legislation for workplace health and safety requirements

Party Wall Act 1996: Legislation governing works affecting walls shared between properties or close to property boundaries

Rights of Light Legislation: Common law and statutory provisions protecting neighboring properties' access to light

Environmental Impact Assessment Regulations: Requirements for assessing environmental impacts of significant development projects

Conservation of Habitats and Species Regulations 2017: Protection of wildlife and habitats that may be affected by development

Teams

Employer, Employee, Start Date, Job Title, Department, Location, Probationary Period, Notice Period, Salary, Overtime, Vacation Pay, Statutory Holidays, Benefits, Bonus, Expenses, Working Hours, Rest Breaks,  Leaves of Absence, Confidentiality, Intellectual Property, Non-Solicitation, Non-Competition, Code of Conduct, Termination,  Severance Pay, Governing Law, Entire Agreemen

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