Planning Permission Made Simple for UK Property Developers
Maximise Your Site’s Value and Get Approved Faster with Developer-Led Planning & Design Services
- Increase Gross Development Value (GDV) through smarter layouts
- Reduce planning risk and delays
- Work with developers who understand ROI
Struggling to Unlock Your Site’s Full Potential?
If you’re a developer or landowner, you’ve likely faced:
Planning refusals or delays
Designs that limit your site’s value
Endless revisions with architects
Uncertainty on what your site can achieve
We help you solve this.
Avoid Costly Planning Mistakes - Start Here
Planning mistakes don’t just cost time—they wipe out margins. From “dead” layout space to flat-out refusals, the wrong strategy can stall your project before it starts.
At Cosy Hauz, we think like developers, not just consultants. We de-risk your timeline and engineer approvals designed to maximise your return on every square foot.
Our Planning & Design Services
Full-Cycle Planning, Expertly Managed by a Proactive Team
We manage the entire lifecycle—from feasibility, planning applications, and technical drawings to external consultant reports and persistent Council liaison.
Planning Application Preparation & Submission
Permitted Development
- Prior Approval – Extensions
- Class MA Conversion
- Certificate of Lawful Use / Development
Pre-Application
Full Planning Application
Post-Planning
- Appeal Statements
- Discharge/Variation/Removal of Conditions
- Minor Material & Non-material Amendments
- Building Control Drawings
Architectural Design Development & Planning Research
- Planning Research
- Initial Site Filtering
- Outline & End Scheme
- Existing & Proposed Drawings
- Cycle, Bin, Boundary & Landscape Plans
- CGI & 3D Renderings
Technical Reports & External Consultant Coordination
Internal Planning Reports
- Planning / Design & Access Statements
- SAP
- Building Control Drawings
- HMO Management Plans & Licensing
- Energy and Water Statement
- Air Quality Neutral Statement
- External Material Schedule
- Construction Phase Plans
Coordination for External Reports
- Flood Risk Assessment
- Daylight & Sunlight Assessment
- Sustainable Urban Drainage System Report
- Archeological and Arboricultural Tree Survey
- Parking Stress Survey
- Professional Survey Measurements
- PEA/PRA Surveys
- Biodiversity Report
- Transport Impact Assessment
Strategic Local Expertise
Explore the map to see where we have secured approvals across London and nearby boroughs. Our deep understanding of specific council policies ensures your project is tailored for local success.
Designed by Developers, Not Just Planners
Your vision, backed by award-winning expertise. Discover how we navigate complex planning hurdles to unlock your site’s hidden value and secure the high-yield results your investment deserves.
The Transformation
We converted a single family dwelling into a high-yield 5-bed HMO and simultaneously secured planning to build a new, detached 3-bed family home on the side plot.
Total Secured Area: 245 SQM (124 sqm HMO & 121 sqm New Build)
Strategic Highlights
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Maximum Density: Combined Permitted Development (HMO) with a full planning application (New Build) to unlock peak site value.
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Award Recognition: Finalist for the 2023 HMO Property Deal of the Year (Property Investor Awards).
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300% ROI Success: Achieved outstanding 300% Return on Investment across both assets in just 6 months.
The Transformation
We converted a standard 3-bedroom semi-detached house into a high-yield 9-bedroom large HMO, more than doubling the internal area from 98 sqm to 213 sqm.
Strategic Highlights
- Planning Path: Executed a phased transition from C3 to C4, then secured a 7-person HMO via CLEUD, before obtaining full consent for the final 9-bedroom layout.
- The “CLEUD” Advantage: We can help you secure 7-bed HMO status without a full planning application through a Certificate of Lawfulness (CLEUD), significantly reducing risk.
The Transformation
We demolished a derelict single-storey detached house to construct a premium 2.5-storey development comprising 6 large flats. We increased the property size nearly fivefold, from 116 sqm to 547 sqm.
Strategic Highlights
- Density Maximisation: Tranformed a single underutilised dwelling with a high-density, multi-unit scheme that drastically increased the site’s GDV.
- Expert Negotiation: Secured planning permission for a significant increase in massing and height, transforming a derelict site into a landmark residential asset.
How It Works
Our strategy-led process navigates every stage from initial design development to the final planning decision. We provide a clear roadmap for your project to secure your approval.
Site Detail Submission
- Provide your site location and project objectives to begin our review.
Planning Research and Design Development 1-2 weeks
- Planning Research
- Outline scheme
- Final scheme
Planning Application and Technical Reports Preparation *varies
- Drawings & Supporting Statements
- Reviewing Plans & Evidence
- Documentation & Reports
Submission and Determination Support 6-8 weeks
- Submission to Local Planning Authority
- Validation, Monitoring, Liaising
Decision & Post-Planning Guidance
- Post-Planning Applications
- Building Control
Why Developers Choose Cosy Hauz
Developer-led Approach
Proven experience in London projects
Focus on ROI, not just approval
End-to-end support
Proven results, trusted by developers.
Read about the Cosy Hauz experience from those we’ve helped succeed.
Ready to Maximise Your Site?
Send us your site by filling out the form below, and we’ll assess its potential.
Once submitted, our expert team will review your requirements prior to your preferred schedule for the discovery call.
