Expert planning applications for house extensions across London. We handle everything from initial assessment to council approval, with a high success rate.
We visit your property and assess whether your project needs planning permission or qualifies under permitted development.
Our architects create detailed plans, elevations and supporting documents that meet your council's specific requirements.
We submit the full application, liaise with the planning officer, and handle any queries or amendments.
Once approved, we prepare building regulation drawings so construction can begin. high of our applications are approved.
Every London borough has different planning policies, conservation areas and development pressures. Our high approval rate comes from deep knowledge of borough-specific requirements and planning officer expectations.
The government planning application fee for a householder application in England is £548 from 1 April 2026, plus a £91.02 Planning Portal processing charge unless you pay the council directly. Prior approval for a larger home extension costs £249, and a lawful development certificate for proposed works costs £274. Our professional fees for preparing and submitting a full planning application, including all drawings and supporting documents, typically range from £1,500 to £3,500 depending on project complexity.
The statutory determination period for a householder planning application is 8 weeks from validation. However, allow 2-4 weeks for us to prepare drawings and documents before submission. In total, expect 10-12 weeks from instruction to decision. Pre-application advice from the council can add 4-6 weeks but significantly improves approval chances.
Permitted development (PD) rights allow certain types of building work without needing to apply for planning permission, subject to specific limits and conditions. Planning permission is a formal application required when your project exceeds PD limits or your property has restrictions (conservation area, listed building, Article 4 direction). We assess which route is right for your project.
We have a high planning approval rate across all our London applications. This high success rate comes from our thorough understanding of each borough's specific planning policies, pre-application consultations where appropriate, and careful design that addresses likely officer concerns before they arise.
If planning is refused, we review the refusal reasons in detail and advise on the best course of action. This usually involves amending the design to address the specific concerns raised. We resubmit amended applications at no additional design fee. If the refusal is unreasonable, we can advise on the planning appeal process.
Many loft conversions fall under permitted development, particularly rear-facing dormers outside conservation areas. However, hip-to-gable conversions, front-facing dormers, and lofts in conservation areas or on listed buildings require planning permission. In London, many boroughs have Article 4 directions that remove some PD rights, so professional advice is essential.
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