No material change or movement within a use class
The facts, existing lawful use and any restrictive condition still need checking before relying on this route.
Residential architecture service
Property Development & Change of Use
Development and change-of-use projects should begin with the lawful use, site constraints and correct consent route rather than a fixed unit target. We combine planning appraisal with architectural capacity testing so clients can decide whether to proceed, revise the brief or stop before committing to disproportionate costs.
Suitable for
Projects we can support.
- Commercial buildings being considered for residential conversion
- Infill, backland and small residential development sites
- Agricultural buildings and rural conversion opportunities
- Care, supported-living and specialist residential proposals
- Property acquisitions requiring an early planning and capacity review
Our process
A structured route through the project.
Establish the baseline
We review the lawful use, planning history, policy context, designations, Article 4 directions and the evidence available.
Test constraints and capacity
Access, building fabric, neighbouring amenity, parking, servicing, flood, heritage, ecology and realistic accommodation are considered proportionately.
Select the consent route
We compare full planning permission, permitted development with prior approval and lawful-development routes without assuming that the quickest route is automatically the strongest.
Develop the application
The preferred option is translated into coordinated drawings, supporting statements and a clear schedule of specialist information.
Typical deliverables
What the appointment may include.
The final scope is confirmed in a written fee proposal tailored to the property and approval route.
Planning-history, lawful-use and policy review
Site and building constraint appraisal
Sketch capacity or conversion layouts
Consent-route and risk comparison
Planning, prior-approval or lawful-development drawings
Consultant brief and next-step programme
RIBA-aligned scope
Clear stages and responsibilities.
The appointment is aligned to the RIBA Plan of Work stages that are proportionate to a residential project.
Stage 0: strategic opportunity and acquisition review
Stage 1: evidence, brief and consultant scope
Stage 2: capacity testing and concept design
Stage 3: selected planning or prior-approval route
Stage 4: technical design where separately appointed
Indicative timescales.
- Focused desktop appraisal: usually 1–2 weeks
- Survey and capacity testing: commonly 2–5 weeks
- Application preparation: commonly 3–10 weeks depending on the route and specialist evidence
- Authority determination: governed by the selected application procedure and local validation
Proportionate fixed scopes.
The first appointment is normally a defined feasibility or eligibility stage. If the evidence supports progressing, relevant survey, research and design work can be carried into a separately agreed application scope.
Use the fee calculatorSeparate appointments and costs.
- Guarantee of planning permission, prior approval or development value
- Formal valuation, residual land-value or funding advice
- Legal title, covenant, tenancy or disputed lawful-use advice
- Specialist transport, flood, ecology, contamination, heritage or fire reports
- Structural and civil engineering
- Statutory application fees and third-party charges
Primary planning sources
Guidance checked against the statutory framework.
Planning rights change and local controls can remove or qualify them. These pages use primary government and legislation sources, but the property-specific position must still be checked before an application or acquisition.
Last reviewed: .
Independent client feedback
Clear advice and dependable communication.
Great service! David was on time with the plans, and his advice has been invaluable throughout the process.Verified homeownerView on MyBuilder
David was a pleasure to deal with throughout. He was easy to talk to and nothing was too much.Verified homeownerView on Checkatrade
Frequently asked questions
Common questions about this service.
What should be checked before buying a development property?
The proportionate checks depend on the asset, but usually include lawful use, planning history, policy and designations, access, physical capacity, neighbouring relationships and the specialist evidence likely to be required.
Does every change of use require full planning permission?
No. Movement within the same use class may not amount to development, and some changes benefit from permitted development rights. Other proposals require full planning permission. Conditions, Article 4 directions and the exact statutory limitations must be checked.
Is prior approval the same as planning permission?
Prior approval is a procedure attached to particular permitted development rights. The national permission exists only where every limitation and condition is met, and the authority considers the specified prior-approval matters.
Can a feasibility study guarantee the number of homes?
No. It tests realistic architectural capacity and planning risk using the evidence available. Only a formal decision can determine an application, and technical or commercial due diligence may change the viable capacity.
Discuss your project
Speak directly with a residential architect.
Call now or book a free 30-minute consultation to discuss the property, approval route and likely next steps.