Planning Permission in Lewisham

The London Borough of Lewisham is one of South East London’s most diverse, community driven, and rapidly evolving boroughs. With its mix of Victorian terraces, post war housing, conservation areas, and major regeneration zones, Lewisham offers homeowners significant opportunities to extend, modernise, and reconfigure their homes. From the conservation areas of Brockley, Blackheath, and Deptford to the suburban neighbourhoods of Catford, Forest Hill, Sydenham, Hither Green, and Grove Park, the borough blends heritage character with modern urban living.
However, Lewisham also has a structured and sometimes stringent planning framework. The borough places strong emphasis on design quality, neighbour amenity, sustainability, and character preservation. This means that proposals must be carefully prepared to meet Lewisham’s expectations and align with its detailed planning guidance.
Whether you’re planning a rear extension, loft conversion, garage conversion, outbuilding, or internal reconfiguration, Lewisham requires proposals to be well designed, policy aligned, and sensitive to the borough’s varied architectural context.

Understanding Lewisham’s Planning Environment

Lewisham is known for its clear planning policies and its commitment to maintaining the character of its residential neighbourhoods. The borough contains several conservation areas, including Brockley, Blackheath, Deptford High Street, and parts of Forest Hill. These areas are protected for their architectural and historic significance, meaning external alterations must preserve or enhance local character. Proposals affecting listed buildings or heritage streetscapes require careful justification and may need heritage statements.
Neighbour amenity is a major consideration in Lewisham. Extensions must be designed to avoid harming daylight, sunlight, privacy, or the sense of openness enjoyed by neighbouring properties. The council uses clear amenity tests, including the 45 degree and 25 degree rules, to assess the impact of extensions on neighbouring windows and gardens. Even modest proposals may require detailed analysis, especially in terraced or semi detached streets.
Lewisham is particularly known for its structured approach to rear extensions, loft conversions, and outbuildings. Rear extensions — including wrap arounds and side returns — are common but must respect scale, materials, and the character of the host property. Loft conversions are widely accepted when designed sensitively, with dormers kept subordinate to the main roof. Roof terraces are especially sensitive due to privacy concerns.
Flats and maisonettes are common in Lewisham, especially in areas like Deptford, New Cross, and Catford. The council has strict policies governing extensions to flats, roof alterations, and changes of use. Proposals must demonstrate adequate internal space, amenity, and compliance with Lewisham’s residential standards.
Flood risk is a consideration in areas near the Ravensbourne, Quaggy, and Thames rivers. Properties in these zones may require flood risk assessments or resilient design measures.
Sustainability is another key priority. Lewisham encourages energy efficient design, sustainable materials, and proposals that reduce carbon impact. This can influence glazing choices, insulation, and the overall design approach.

What SMARTePLANS Provides

SMARTePLANS offers a comprehensive planning service tailored to Lewisham’s clear but detail oriented planning environment. Our expertise ensures your proposal is robust, policy aligned, and positioned for approval.
• Detailed Planning Drawings
We produce precise architectural drawings for extensions, loft conversions, internal alterations, and façade changes. Our designs respect Lewisham’s character while maximising your space.
• 3D Laser Surveys & Modelling
Accurate measurement is essential for high quality design. Our 3D surveys capture every detail, enabling us to produce highly accurate plans and visualisations.
• Design & Access Statements
We prepare clear, persuasive statements that explain the design rationale, demonstrate policy compliance, and address Lewisham’s key concerns.
• Heritage & Conservation Expertise
For properties in conservation areas or listed buildings, we prepare sensitive, policy compliant designs supported by heritage statements where necessary.
• Daylight/Sunlight Analysis
Where required, we arrange specialist assessments to support your application and address neighbour amenity considerations.
• Flood Risk & Environmental Documentation
For properties near rivers or low lying areas, we coordinate flood risk assessments and resilient design measures.
• Planning Agent Representation
We manage the entire process — liaising with planning officers, responding to queries, and ensuring your application is complete and professionally presented.

Key Local Planning Considerations in Lewisham

1. Conservation Areas
Proposals must preserve or enhance local character, affecting:
• Rooflines
• Windows and doors
• Materials
• Extensions
• Boundary treatments
2. Neighbour Amenity
Extensions must demonstrate minimal impact on:
• Daylight
• Sunlight
• Privacy
• Sense of enclosure
3. Loft Conversions & Roof Alterations
Dormers must be modest, well integrated, and subordinate to the main roof. Roof terraces are often restricted.
4. Flats & Intensification
Lewisham has strict policies governing extensions to flats and intensification of residential plots.
5. Flood Risk
Properties near the Ravensbourne or Quaggy may require flood risk assessments.

Why Choose SMARTePLANS for Lewisham Applications

SMARTePLANS has extensive experience working within Lewisham’s planning framework. Our 99% approval rate reflects our commitment to policy led design, meticulous preparation, and proactive communication with planning officers.

Homeowners choose us because:

• We understand Lewisham’s unique suburban and urban constraints
• We produce high quality, policy aligned designs
• We manage the entire process from survey to submission
• We specialise in extensions, loft conversions, and conservation sensitive proposals
• We deliver fast turnaround times without compromising quality
Whether you’re planning an extension, loft conversion, internal reconfiguration, or a more complex redevelopment, we ensure your application is robust, compliant, and positioned for approval.

Start Your Lewisham Planning Application Today

SMARTePLANS offers a free, no obligation quote and expert guidance tailored to your property. Our team handles everything — from surveys to submission — so you can move forward with confidence.