Daylight & Sunlight Assessment Cost
£499 + VAT covers the simplest job: a terraced house under 100 m² with a single-storey rear extension affecting one neighbour. Most reports are £675-£935 + VAT. Every fee is fixed and agreed in writing before you commit.
Fixed fees for every type of assessment.
Neighbour Solar Panel Impact Reports
APSH impact assessments for proposed solar panel installations nearby.
What moves your fee up from £499.
— A larger house, or a semi or detached rather than a terrace
— A two-storey, wraparound or roof extension rather than a single-storey rear
— Internal daylight as well as neighbour impact
— Flats, conversions and multi-unit schemes
The £499 job is a small terrace with one single-storey rear extension and one neighbour affected. Every step beyond that adds modelling and testing time.
A proven process that delivers.
01 Receive Plans — CAD, PDF and 3D models.
02 3D Modelling — accurate SketchUp models.
03 Specialist Analysis — BRE-approved software.
04 Quality Review — checked by our senior team.
05 Defensible Report — clear, planning-ready.
Everything in one fixed price.
Fixed fee agreed upfront
No hourly rates
Most £675-£935 + VAT
Frequently asked
questions
Everything you need to know before ordering a report.
Still need help?
Please reach us at info@sunlightassessments.co.uk
if you cannot find an answer to your question.
What happens if the assessment does not meet the BRE guidelines?
Not meeting a BRE guideline does not automatically mean planning permission will be refused. We review the results in context and, where possible, recommend design changes or provide supporting commentary to help strengthen the planning case.
How much does a daylight and sunlight assessment cost for a home extension?
£499 + VAT covers the simplest job: a terraced house under 100 m² with a single-storey rear extension affecting one neighbour. Most home extension reports are £675–£935 + VAT.
What moves the fee up is how many neighbouring properties need testing, a larger house or a semi or detached rather than a terrace, and a two-storey, wraparound or roof extension rather than a single-storey rear. Whatever your project, the fee is fixed and agreed in writing before you commit.
Use the instant calculator for a quick estimate, or send us your plans for a confirmed fixed-fee quote.
What is the 45 degree rule?
The 45-degree rule is a planning rule of thumb used to assess whether a proposed extension or development could affect the daylight and sunlight received by neighbouring properties. If a proposal extends beyond a 45-degree line from a neighbouring window, a more detailed daylight and sunlight assessment may be recommended. It does not automatically mean the proposal will be refused.
Get your fixed fee in under a minute
Answer a few quick questions about your project and see your price straight away, with no obligation.
or call 01962 809155
Specialist daylight, sunlight and overshadowing assessments for planning and development across the UK.
FOR ALL NEW ENQUIRIES - please fill out the contact form.
37/39 Southgate Street, Winchester Hampshire SO23 9EH
15189362
