Planning Permission & Building Regulations in Harrow, HA1
Planning applications, lawful development certificates, listed building consent, building control and party wall matters for properties in Harrow, prepared and managed by our own team.
Covered under one contract
- Planning applications and lawful development certificates
- Listed building and conservation area consent
- Building regulations, full plans or building notice
- Structural calculations
- Party wall notices
- Licence to alter for flats
Planning Permission & Building Regulations in Harrow.
Whether a project in Harrow needs planning permission, and how difficult that permission is to obtain, depends on the property: whether it is in a conservation area, whether it is listed, whether it is a flat with a freeholder, and whether the council has removed permitted development rights on the street. We check all of this at the first visit and tell you the route before any drawings are made.
We then prepare and submit whatever is needed to the London Borough of Harrow: a householder application, a lawful development certificate for permitted development, listed building consent with a heritage statement, or prior approval for a larger extension. Building regulations are handled through an approved inspector or the council's building control, and party wall notices are served where a neighbour's structure is affected.
Because our architects prepare the drawings and our team builds from them, there is no handover between designer, agent and builder. One team is responsible for getting the approval and for building what was approved.
- Area
- Harrow, HA1 · HA2
- Council
- London Borough of Harrow
- Housing
- 1930s semi-detached and detached houses, Victorian and Edwardian houses on the Hill, inter-war terraces around Rayners Lane and North Harrow
- Transport
- Harrow-on-the-Hill (Metropolitan), Rayners Lane, North Harrow
- Householder application
- 8 weeks from validation
- Listed building consent
- 8 weeks, longer with Historic England
- Lawful development certificate
- 8 weeks
- Party wall notice
- 1 or 2 months before works
- Building control
- Inspections to completion certificate
Harrow: the houses and the planning rules.
Harrow is Metroland: the streets around Harrow-on-the-Hill, North Harrow and Rayners Lane were built between the wars for commuters on the Metropolitan line, with generous semi-detached houses on plots that suit rear extensions and loft conversions. On the Hill itself, the village around the school is older, with Victorian and Georgian houses inside a conservation area.
It is one of our busiest areas. We have built a rear extension with bi-fold doors and a new kitchen in Rayners Lane, a loft and six-metre rear extension in Harrow on the Hill, refurbished a house in North Harrow, and fitted out cafés in St George's shopping centre and at the bus station.
The Harrow on the Hill Village and Roxeth Hill conservation areas cover the Hill; most of the borough is unrestricted.
London Borough of Harrow
Harrow decides applications. Outside the Hill's conservation areas, most rear extensions and loft conversions fall within permitted development, subject to the usual size limits.
Permitted development
Single-storey rear extensions up to 3 metres, or 6 metres with prior approval, and rear dormers within 50 cubic metres are typical. A lawful development certificate is worth obtaining for resale.
Harrow on the Hill
Within the village conservation area, extensions and roof changes need a planning application and matching materials.
Approvals for planning permission and building regulations in Harrow.
We confirm the approvals route at the site visit, prepare the drawings to the council's validation standard and manage each application through to decision, including building control inspections and party wall notices.
Harrow decides applications. Outside the Hill's conservation areas, most rear extensions and loft conversions fall within permitted development, subject to the usual size limits.
What planning permission and building regulations in Harrow includes.
- Planning applications and lawful development certificates
- Listed building and conservation area consent
- Building regulations, full plans or building notice
- Structural calculations
- Party wall notices
- Licence to alter for flats
From site visit to handover.
- 01
Site visit & consultation
We visit, listen and measure. Brief, budget and constraints understood before any advice is given.
- 02
Design & itemised quote
Our architects and engineers draw the scheme, and from that we provide a transparent, itemised quotation for your approval.
- 03
Planning & approvals
Planning applications, building control and party wall matters handled for you.
- 04
Build, managed weekly
Our own trades, sequenced by a site manager. Progress reported every week.
- 05
Handover & aftercare
Joint snagging walk-through, documentation, and a guarantee on our workmanship.
Planning Permission & Building Regulations in Harrow: your questions.
Who decides planning applications in Harrow?
The London Borough of Harrow. Householder applications are normally decided within eight weeks of validation; listed building consent runs to the same timescale unless Historic England is consulted.
Do I need planning permission in Harrow?
It depends on the property and the proposal. Permitted development covers many rear extensions and lofts, but not in flats, listed buildings or where Article 4 directions apply. We confirm the route at the first visit.
Which parts of Harrow do you cover?
All of Harrow and HA1 · HA2, including Rayners Lane, Pinner Road, Harrow View, Roxeth Hill, High Street, Harrow on the Hill, Station Road, and the neighbouring districts. We are based in London and our teams work across central, north, north-west, west and south-west London.
Our work near Harrow.
Other services in Harrow.

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Flat Refurbishment in Harrow
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House Extensions in Harrow
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Structural Alterations in Harrow
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Loft Conversions in Harrow
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Basement Conversions in Harrow
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Kitchen Renovation in Harrow
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Bathroom Renovation in Harrow
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Architectural & Interior Design in Harrow
Read morePlanning Permission & Building Regulations across London.
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We will visit, listen and explain what is possible for your property and how it would be approved. No pressure, no sales pitch.



