Planning Permission London: Complete Homeowner Guide 2025

PERMITTED DEVELOPMENT (PD) RIGHTS ARE A SET OF NATIONAL PLANNING PERMISSIONS GRANTED AUTOMATICALLY BY THE TOWN AND COUNTRY PLANNING (GENERAL PERMITTED DEVELOPMENT) (ENGLAND) ORDER 2015 (GPDO 2015). THEY ALLOW CERTAIN TYPES OF DEVELOPMENT TO PROCEED WITHOUT A FORMAL PLANNING APPLICATION. FOR HOMEOWNERS, THE MOST RELEVANT PERMITTED DEVELOPMENT CLASSES ARE:

CLASS A — ENLARGEMENT, IMPROVEMENT OR OTHER ALTERATION OF A DWELLINGHOUSE: REAR EXTENSIONS UP TO 4 METRES DEEP (DETACHED) OR 3 METRES DEEP (ATTACHED), UP TO THE ORIGINAL ROOF HEIGHT, AND NOT EXCEEDING 50% GROUND COVERAGE OF THE CURTILAGE. SINGLE-STOREY REAR EXTENSIONS UNDER THE LARGER HOME EXTENSION SCHEME CAN BE UP TO 8 METRES (DETACHED) OR 6 METRES (SEMI/TERRACED) DEEP — BUT REQUIRE PRIOR APPROVAL.

CLASS B — ADDITIONS TO THE ROOF: LOFT CONVERSIONS ADDING UP TO 40 CUBIC METRES OF ADDITIONAL ROOF SPACE (TERRACED HOUSES) OR 50 CUBIC METRES (DETACHED/SEMI), PROVIDED THE EXTENSION DOES NOT PROJECT BEYOND THE SLOPE OF THE ORIGINAL FRONT ROOF, DOES NOT EXCEED THE HIGHEST POINT OF THE ORIGINAL ROOF, AND ALL MATERIALS CLOSELY MATCH THE EXISTING HOUSE.

CLASS C — OTHER ALTERATIONS TO THE ROOF: REROOFING AND INSTALLATION OF ROOF WINDOWS ON THE REAR OR SIDE SLOPES (SUBJECT TO NO PROJECTION ABOVE THE PLANE OF THE SLOPE).

CLASS E — BUILDINGS AND ENCLOSURES ETC. WITHIN THE CURTILAGE: OUTBUILDINGS, GARDEN OFFICES, GARAGES, SHEDS, AND SWIMMING POOLS. CONDITIONS INCLUDE: SINGLE STOREY ONLY; MAXIMUM EAVES HEIGHT 2.5 METRES AND MAXIMUM RIDGE HEIGHT 4 METRES (DUAL PITCH) OR 3 METRES (FLAT/MONO-PITCH); TOTAL AREA OF ALL OUTBUILDINGS NOT TO EXCEED 50% OF THE CURTILAGE; NOT FORWARD OF THE PRINCIPAL ELEVATION.

CLASS G — CHIMNEYS, FLUES AND SOIL AND VENT PIPES: INSTALLATION OF FLUES FOR SOLID FUEL STOVES AND GAS BOILERS IS GENERALLY PD SUBJECT TO CONDITIONS.

CRITICAL LIMITATIONS ON PD RIGHTS: — PD RIGHTS DO NOT APPLY TO FLATS OR MAISONETTES — PD RIGHTS ARE SIGNIFICANTLY REDUCED IN CONSERVATION AREAS (NO SIDE EXTENSIONS, NO CLADDING CHANGES, NO PD FRONT EXTENSIONS) — ARTICLE 4 DIRECTIONS CAN REMOVE PD RIGHTS IN ANY AREA — HOUSES BUILT UNDER SPECIFIC CONDITIONS (E.G. COVENANTS, PLANNING CONDITIONS REMOVING PD) MAY HAVE REDUCED OR NO PD RIGHTS

THE LARGER HOME EXTENSION SCHEME (ALSO CALLED THE NEIGHBOUR CONSULTATION SCHEME) ALLOWS SINGLE-STOREY REAR EXTENSIONS BEYOND THE STANDARD 3-4 METRE PD LIMITS UP TO 6 METRES (TERRACED/SEMI) OR 8 METRES (DETACHED). IT OPERATES UNDER GPDO 2015 CLASS A.1(G) AND REQUIRES PRIOR APPROVAL FROM THE LOCAL PLANNING AUTHORITY (LPA).

PRIOR APPROVAL PROCESS: 1. SUBMIT A PRIOR APPROVAL APPLICATION TO YOUR LPA WITH A FEE (£258 AS OF APRIL 2025, SAME AS A HOUSEHOLDER APPLICATION — NOTE THIS FEE WAS DOUBLED IN DECEMBER 2023). 2. THE LPA NOTIFIES ALL ADJOINING NEIGHBOURS AND GIVES THEM 21 DAYS TO COMMENT. 3. IF NO OBJECTIONS: THE LPA SHOULD APPROVE WITHIN 42 DAYS. 4. IF OBJECTIONS: THE LPA ASSESSES WHETHER THE EXTENSION WOULD HAVE AN UNACCEPTABLE IMPACT ON THE AMENITY OF NEIGHBOURING PROPERTIES. THE LPA CANNOT CONSIDER ANY OTHER PLANNING FACTORS (DESIGN, MATERIALS, OVERLOOKING, ETC.) — ONLY IMPACT ON AMENITY.

IMPORTANT: PRIOR APPROVAL UNDER THE LARGER HOME EXTENSION SCHEME IS NOT THE SAME AS PLANNING PERMISSION. IF PRIOR APPROVAL IS REFUSED, YOU STILL HAVE THE FALLBACK OF THE STANDARD PD ALLOWANCE (3M/4M) WITHOUT NEEDING FURTHER APPLICATION.

STRATEGY NOTE: FOR REAR EXTENSIONS IN LONDON, WHERE MANY GARDENS ARE SHORT AND NEIGHBOURS ARE CLOSE, THE LARGER HOME EXTENSION SCHEME IS OFTEN NOT WORTH THE RISK IF OBJECTIONS ARE LIKELY. A STRUCTURAL REAR EXTENSION TO 4.8M OR 5.5M UNDER A SEPARATE ROOF DESIGN (E.G. A LANTERN OR HIP ROOF THAT REDUCES VISUAL BULK) IS FREQUENTLY MORE VIABLE THAN A LARGER BOX EXTENSION REQUIRING PRIOR APPROVAL OR FULL PLANNING.

A HOUSEHOLDER PLANNING APPLICATION (HPA) IS REQUIRED WHEN YOUR PROPOSED WORKS FALL OUTSIDE PERMITTED DEVELOPMENT RIGHTS OR REQUIRE PRIOR APPROVAL THAT IS THEN REFUSED. A HOUSEHOLDER APPLICATION COVERS WORKS TO AN EXISTING DWELLING AND ITS CURTILAGE — IT IS NOT THE CORRECT APPLICATION TYPE FOR CHANGE OF USE, NEW BUILDS, OR WORKS TO LISTED BUILDINGS.

FEE: £258 (AS OF APRIL 2025). THIS FEE COVERS ALL WORKS LISTED IN A SINGLE HPA. YOU CANNOT SPLIT WORKS ACROSS MULTIPLE APPLICATIONS TO SAVE MONEY — THE PLANNING AUTHORITY WILL COMBINE RELATED APPLICATIONS.

TIMESCALE: LOCAL PLANNING AUTHORITIES HAVE A TARGET OF EIGHT WEEKS TO DETERMINE HOUSEHOLDER APPLICATIONS. IN PRACTICE, COMPLEX APPLICATIONS IN CONSERVATION AREAS OR APPLICATIONS WITH SIGNIFICANT OBJECTIONS CAN TAKE 13 WEEKS OR MORE. APPLICATIONS THAT GO TO PLANNING COMMITTEE (RARE FOR HPAs BUT POSSIBLE IF CONTENTIOUS) TAKE LONGER STILL.

DOCUMENTS TYPICALLY REQUIRED: — LOCATION PLAN (ORDNANCE SURVEY AT 1:1250 SCALE, SITE HATCHED RED) — BLOCK PLAN (1:500 SCALE, SHOWING SITE BOUNDARIES AND NEIGHBOURING BUILDINGS) — EXISTING AND PROPOSED PLANS, ELEVATIONS, AND SECTIONS (TYPICALLY 1:100) — DESIGN AND ACCESS STATEMENT (REQUIRED FOR MAJOR APPLICATIONS AND APPLICATIONS IN DESIGNATED AREAS — CHECK LOCAL REQUIREMENTS) — HERITAGE STATEMENT (IF IN OR NEAR A CONSERVATION AREA OR AFFECTING A HERITAGE ASSET)

APPLICATION PORTAL: PLANNING PORTAL (WWW.PLANNINGPORTAL.CO.UK) IS THE NATIONAL ONLINE SUBMISSION SYSTEM. ALL 33 LONDON BOROUGHS ACCEPT APPLICATIONS THROUGH THE PORTAL.

PLANNING PORTAL TIP: WHEN UPLOADING DRAWINGS, USE PDF FORMAT AND ENSURE ALL DRAWINGS ARE CLEARLY LABELLED WITH REVISION NUMBERS AND SCALES. LPA OFFICERS ROUTINELY REJECT OR SLOW DOWN APPLICATIONS WHERE DRAWINGS ARE MISSING, INCONSISTENT, OR INSUFFICIENTLY DETAILED.

LONDON HAS MORE THAN 1,000 DESIGNATED CONSERVATION AREAS ACROSS ITS 32 BOROUGHS — MORE THAN ANY OTHER ENGLISH CITY. A CONSERVATION AREA IS AN AREA OF SPECIAL ARCHITECTURAL OR HISTORIC INTEREST WHERE CHARACTER AND APPEARANCE ARE PRESERVED AND ENHANCED THROUGH ADDITIONAL PLANNING CONTROLS.

IF YOUR PROPERTY IS IN A CONSERVATION AREA, THE FOLLOWING ADDITIONAL RESTRICTIONS APPLY:

REDUCED PD RIGHTS: — CLADDING OR RENDERING THE EXTERNAL WALLS IS NOT PD (ALWAYS REQUIRES PLANNING CONSENT) — SIDE EXTENSIONS ARE NOT PD — OUTBUILDINGS THAT FRONT A HIGHWAY ARE NOT PD — ROOF ALTERATIONS VISIBLE FROM A HIGHWAY ARE NOT PD

DEMOLITION REQUIRES CONSENT: DEMOLISHING ANY STRUCTURE OVER 115 CUBIC METRES WITHIN A CONSERVATION AREA REQUIRES CONSERVATION AREA CONSENT (NOW COVERED UNDER PLANNING PERMISSION FOR DEMOLITION).

DESIGN EXPECTATIONS ARE HIGHER: PLANNING OFFICERS ASSESS APPLICATIONS IN CONSERVATION AREAS AGAINST THE LOCAL CONSERVATION AREA APPRAISAL AND MANAGEMENT PLAN. EXTENSIONS MUST USE MATERIALS THAT CLOSELY MATCH THE EXISTING PROPERTY (MATCHING LONDON STOCK BRICK, FOR EXAMPLE, RATHER THAN MODERN FACING BRICK), AND DESIGN MUST RESPECT THE PREVAILING CHARACTER AND APPEARANCE OF THE AREA.

FINDING YOUR CONSERVATION AREA STATUS: USE YOUR COUNCIL'S ONLINE PLANNING MAP OR THE MAGIC PORTAL (MAGIC.DEFRA.GOV.UK) TO CHECK IF YOUR PROPERTY IS IN A CONSERVATION AREA. DOWNLOAD AND READ THE SPECIFIC CONSERVATION AREA APPRAISAL BEFORE INSTRUCTING AN ARCHITECT — THIS WILL DEFINE WHAT DESIGN APPROACH IS LIKELY TO BE APPROVED.

NOTABLE LONDON CONSERVATION AREAS WITH STRICT DESIGN GUIDANCE: — BELGRAVIA (WESTMINSTER): HIGH STUCCO TERRACE CHARACTER, VIRTUALLY NO CONTEMPORARY ADDITIONS APPROVED — CAMDEN SQUARE (CAMDEN): STOCK BRICK VICTORIAN VILLAS, STRICT ON FENESTRATION CHANGES — DULWICH VILLAGE (SOUTHWARK): SETBACK AND BOUNDARY TREATMENT CHARACTER — ISLINGTON'S CANONBURY CONSERVATION AREA: GEORGIAN TERRACE CHARACTER WITH EXCEPTIONAL SURVIVAL — RICHMOND RIVERSIDE: VERY HIGH BAR FOR ANY VISIBLE CHANGES

AN ARTICLE 4 DIRECTION IS A DIRECTION MADE BY A LOCAL PLANNING AUTHORITY (LPA) UNDER ARTICLE 4 OF THE GPDO 2015 THAT REMOVES SOME OR ALL PERMITTED DEVELOPMENT RIGHTS FROM A SPECIFIED AREA OR CLASS OF DEVELOPMENT. ARTICLE 4 DIRECTIONS ARE MOST COMMONLY USED IN CONSERVATION AREAS TO REQUIRE PLANNING PERMISSION FOR WORKS THAT WOULD OTHERWISE BE PD — BUT THEY CAN ALSO APPLY OUTSIDE CONSERVATION AREAS.

COMMON ARTICLE 4 TARGETS IN LONDON: — REPLACEMENT OF ORIGINAL WINDOWS AND DOORS WITH UPVC — INSTALLATION OF SATELLITE DISHES OR SOLAR PANELS ON FRONT ROOFSLOPES — CONVERSION OF FRONT GARDENS TO HARDSTANDING — REPLACEMENT OF BOUNDARY WALLS WITH FENCING — RENDERING OR CLADDING OF EXTERNAL WALLS — ADDITION OF DORMER WINDOWS ON FRONT ELEVATIONS

THE PRACTICAL IMPACT ON HOMEOWNERS: IF YOUR PROPERTY IS SUBJECT TO AN ARTICLE 4 DIRECTION COVERING REPLACEMENT WINDOWS, FOR EXAMPLE, YOU CANNOT REPLACE YOUR ORIGINAL TIMBER SASH WINDOWS WITH UPVC DOUBLE GLAZING WITHOUT PLANNING PERMISSION. THE LPA WOULD TYPICALLY REFUSE SUCH AN APPLICATION IN A CONSERVATION AREA ON CHARACTER GROUNDS. THE CORRECT SOLUTION IS TO UPGRADE THE ORIGINAL TIMBER FRAMES WITH DOUBLE-GLAZED SASH UNITS (TIMBER LOOK-ALIKE SASHES BY SUPPLIERS SUCH AS VENTROLLA OR SELECTAGLAZE SECONDARY GLAZING — WHICH DOES NOT REQUIRE PLANNING PERMISSION AS IT IS INTERNAL).

HOW TO CHECK ARTICLE 4 DIRECTIONS: SEARCH YOUR LPA'S PLANNING CONSTRAINTS DATABASE OR CONTACT THE PLANNING DEPARTMENT DIRECTLY. ARTICLE 4 DIRECTIONS ARE ALSO NOTED IN THE COUNCIL'S PLANNING VALIDATION CHECKLIST. ALWAYS CHECK THIS BEFORE STARTING ANY WORKS — EVEN WORKS YOU BELIEVE ARE PD.

PRE-APPLICATION ADVICE (OFTEN CALLED PRE-APP) IS A PAID-FOR SERVICE OFFERED BY ALMOST ALL LONDON LPAs THAT ALLOWS APPLICANTS TO DISCUSS PROPOSED DEVELOPMENTS WITH A PLANNING OFFICER BEFORE SUBMITTING A FORMAL APPLICATION. IT IS NOT BINDING — A FAVOURABLE PRE-APP RESPONSE DOES NOT GUARANTEE APPROVAL — BUT IT IS INVALUABLE FOR COMPLEX PROJECTS.

WHEN TO USE PRE-APPLICATION ADVICE: — MAJOR EXTENSIONS IN CONSERVATION AREAS WHERE DESIGN APPROACH IS UNCERTAIN — CHANGE OF USE APPLICATIONS (HOUSE TO HMO, OFFICE TO RESIDENTIAL, ETC.) — BASEMENT CONVERSIONS WITH SIGNIFICANT STRUCTURAL IMPACT — DEVELOPMENTS NEAR LISTED BUILDINGS — PROPOSALS THAT ARE BORDERLINE ON PD LIMITS — PROJECTS WHERE POLICY INTERPRETATION IS AMBIGUOUS

LONDON PRE-APP FEES (TYPICAL RANGE AS OF 2025): — MINOR ENQUIRIES (WRITTEN RESPONSE ONLY): £50-£150 — HOUSEHOLDER PRE-APP (WRITTEN RESPONSE): £100-£400 — HOUSEHOLDER PRE-APP WITH MEETING: £300-£600 — MAJOR DEVELOPMENT PRE-APP: £1,000-£5,000+

EXAMPLE: CAMDEN CHARGES £375 FOR A HOUSEHOLDER PRE-APP WITH MEETING. WESTMINSTER CHARGES £500+ FOR COMPLEX RESIDENTIAL ENQUIRIES. SOUTHWARK OFFERS A DUTY PLANNER SERVICE (NO FEE) FOR MINOR QUERIES.

HOW TO USE PRE-APP EFFECTIVELY: 1. COMMISSION YOUR ARCHITECT TO PREPARE PRELIMINARY PROPOSALS TO SUFFICIENT DESIGN DEVELOPMENT TO SHOW THE PRINCIPLE OF THE SCHEME. 2. PREPARE A WRITTEN DESCRIPTION OF THE PROPOSED DEVELOPMENT AND A LIST OF SPECIFIC QUESTIONS YOU WANT ADDRESSED. 3. REFERENCE THE RELEVANT CONSERVATION AREA APPRAISAL AND LOCAL PLANNING POLICIES IN YOUR ENQUIRY LETTER — THIS SHOWS THE OFFICER YOU HAVE DONE YOUR HOMEWORK AND WILL GET A MORE DETAILED RESPONSE. 4. FOLLOW UP THE PRE-APP IN WRITING TO CONFIRM THE OFFICER'S VERBAL ADVICE — VERBAL ADVICE IS NOT BINDING BUT A WRITTEN RECORD PROTECTS YOU. 5. FACTOR THE PRE-APP TIMESCALE INTO YOUR PROGRAMME — MOST LONDON LPAs RESPOND WITHIN 4-8 WEEKS FOR WRITTEN-ONLY REQUESTS AND 8-12 WEEKS FOR MEETINGS.

PLANNING REFUSALS, ENFORCEMENT ACTIONS, AND UNCERTAINTY ABOUT PD STATUS ARE THREE KEY RISK AREAS FOR LONDON HOMEOWNERS.

PLANNING APPEALS: IF YOUR APPLICATION IS REFUSED, YOU HAVE THE RIGHT TO APPEAL TO THE PLANNING INSPECTORATE. HOUSEHOLDER APPEALS MUST BE MADE WITHIN 12 WEEKS OF THE REFUSAL DATE. MOST HOUSEHOLDER APPEALS ARE DECIDED BY WRITTEN REPRESENTATIONS (NO HEARING) WITHIN 8-14 WEEKS. THE FEE IS FREE. HOWEVER, APPEAL SUCCESS RATES FOR HOUSEHOLDER APPLICATIONS ARE RELATIVELY LOW — APPROXIMATELY 30-35% NATIONALLY — AND A BETTER STRATEGY IS OFTEN TO REVISE AND RESUBMIT A STRONGER APPLICATION (HOUSEHOLDERS CAN SUBMIT ONE FREE AMENDED APPLICATION WITHIN 12 MONTHS OF A REFUSAL FOR A REDUCED FEE OF £0).

PLANNING ENFORCEMENT: IF WORKS ARE CARRIED OUT WITHOUT REQUIRED PLANNING PERMISSION, THE LPA CAN ISSUE: — A PLANNING CONTRAVENTION NOTICE (PCN): REQUESTING INFORMATION ABOUT THE USE OR WORKS. — AN ENFORCEMENT NOTICE: REQUIRING SPECIFIC REMEDIAL ACTION WITHIN A SPECIFIED TIME. — A STOP NOTICE: REQUIRING WORKS TO CEASE IMMEDIATELY (USED IN URGENT CASES). — A BREACH OF CONDITION NOTICE (BCN): FOR FAILURE TO COMPLY WITH PLANNING CONDITIONS. PLANNING ENFORCEMENT HAS A 4-YEAR TIME LIMIT FOR OPERATIONAL DEVELOPMENT (THE ACT OF BUILDING) AND A 10-YEAR TIME LIMIT FOR CHANGE OF USE. AFTER THESE PERIODS, DEVELOPMENT BECOMES IMMUNE FROM ENFORCEMENT ACTION.

LAWFUL DEVELOPMENT CERTIFICATE (LDC): ALTHOUGH PD RIGHTS DON'T REQUIRE APPLICATION, MANY HOMEOWNERS SEEK A LAWFUL DEVELOPMENT CERTIFICATE FROM THE LPA TO CONFIRM IN WRITING THAT THEIR PROPOSED OR COMPLETED WORKS ARE LAWFUL (I.E. PERMITTED DEVELOPMENT OR IMMUNE FROM ENFORCEMENT). AN LDC IS PARTICULARLY VALUABLE: — WHEN SELLING YOUR PROPERTY (SOLICITORS AND BUYERS REQUIRE EVIDENCE THAT WORKS WERE LEGAL) — WHEN REMORTGAGING — WHEN THERE IS AMBIGUITY ABOUT WHETHER WORKS ARE PD FEE: £258 FOR A PROPOSED LDC; £258 FOR A CERTIFICATE OF LAWFULNESS FOR EXISTING DEVELOPMENT. RESPONSE TIME: 8 WEEKS. THE LPA CANNOT REFUSE AN LDC IF THE WORKS CLEARLY COMPLY WITH PD RULES — IT IS A LEGAL DETERMINATION, NOT A DISCRETIONARY DECISION.

LISTED BUILDING CONSENT (LBC) IS REQUIRED FOR ANY WORKS THAT AFFECT THE CHARACTER OF A LISTED BUILDING — BOTH EXTERNALLY AND INTERNALLY. LISTED BUILDINGS ARE STRUCTURES OF SPECIAL ARCHITECTURAL OR HISTORIC INTEREST. IN LONDON, THERE ARE APPROXIMATELY 19,000 LISTED BUILDINGS ACROSS ALL GRADES:

GRADE I: BUILDINGS OF EXCEPTIONAL INTEREST (APPROX 2% OF ALL LISTED BUILDINGS). STRICTEST CONTROLS — ALMOST NO ALTERATIONS APPROVED WITHOUT DETAILED HERITAGE JUSTIFICATION.

GRADE II*: PARTICULARLY IMPORTANT BUILDINGS OF MORE THAN SPECIAL INTEREST (APPROX 6%).

GRADE II: NATIONALLY IMPORTANT AND OF SPECIAL INTEREST (APPROX 92%). THIS IS THE GRADE MOST LONDON HOMEOWNERS ENCOUNTER — MANY GEORGIAN AND EARLY VICTORIAN TERRACE HOUSES IN INNER LONDON BOROUGHS ARE GRADE II LISTED.

KEY RULES: — LISTED BUILDING CONSENT IS REQUIRED IN ADDITION TO PLANNING PERMISSION (IF PLANNING IS ALSO REQUIRED). THEY ARE SEPARATE APPLICATIONS. — INTERNALLY, LBC IS REQUIRED FOR ANY WORKS AFFECTING ORIGINAL FABRIC: REMOVING INTERNAL DOORS, ALTERING SASH WINDOWS, REMOVING PLASTER TO EXPOSE BRICKWORK, REPLACING ORIGINAL FLOORING, AND EVEN INSTALLING SERVICES IN ORIGINAL WALLS CAN REQUIRE LBC. — UNAUTHORISED WORKS TO A LISTED BUILDING ARE A CRIMINAL OFFENCE UNDER THE PLANNING (LISTED BUILDINGS AND CONSERVATION AREAS) ACT 1990 — PUNISHABLE BY UNLIMITED FINE AND/OR IMPRISONMENT. — FEE FOR LBC APPLICATION: FREE (AS OF APRIL 2025 — THE FEE WAS ALWAYS FREE AND REMAINS SO) — TIMESCALE: 8 WEEKS STATUTORY TARGET BUT FREQUENTLY 13-26 WEEKS FOR COMPLEX LISTED BUILDING WORKS.

IF YOU OWN OR ARE CONSIDERING PURCHASING A LISTED BUILDING IN LONDON, ENGAGE A HERITAGE CONSULTANT OR CONSERVATION ARCHITECT BEFORE MAKING ANY ALTERATIONS. THE HISTORIC ENGLAND ADVICE TEAM OFFERS GUIDANCE FOR LISTED BUILDING OWNERS.