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BNG Assessment For Planning Permission

We understand that time matters. Submit your details and we’ll provide a clear, competitive quotation without delay.
  • 1 Week Lead Time
  • Nationwide coverage
  • Trusted by builders, architects, and developers
  • Experienced assessors with industry expertise
  • Suitable for new builds, conversions, and extensions
  • Fully compliant with UK Building Regulations (Part L)
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Reports For Planning Permission Instant Quotation Form
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BNG Assessment Lead Time
Lead times from 24 hours, with a standard turnaround of 4 working days — click here to find out more.
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BNG Case Study
Discover how we helped this client meet deadlines and stay compliant.
Case Study
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How The Process Works
From enquiry to delivery in just a few simple steps.
Find Out How It Works
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BNG Assessment Pricing
Get accurate, fully compliant SAP calculations at a competitive rate, with flexible pricing tailored to suit new builds, extensions, and conversion projects.
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Instant Quotation
Use our instant quotation form to receive a fast, accurate price for your SAP calculation — simply enter your details and get started in minutes.
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Multiple Services Enquiry Page
Use our form to request multiple services in one go, saving you time and effort.
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We’re here to provide support and assistance.
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Lead Time is our priority

Short Lead Times. No Delays.

At Gradwell Environmental, client success means more than completing works — it means solving problems efficiently and minimising disruption to your programme.
One consultant, multiple reports, a smoother planning process.
Case Studies
"Gradwell Environmental provided six of the seven reports required for our planning application, giving us a single point of contact throughout the process and making the entire project far more efficient and straightforward."
customer success
"Gradwell Environmental coordinated and delivered the majority of our planning reports, providing a seamless service and a single point of contact from start to finish."
customer success
"Their ability to manage multiple planning and environmental requirements under one roof saved us considerable time and ensured our project progressed smoothly from start to finish."
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Need A Quote For Several Services?
Use our multiple Services Enquiry Form
Multiple Service Enquiry
Multiple Service Enquiry
BNG Assessment Lead Time
Most Biodiversity Net Gain (BNG) Assessments are completed within 1–3 weeks, depending on the size, complexity, and ecological requirements of the site. Projects requiring habitat surveys, biodiversity metric calculations, or detailed enhancement strategies may require additional time, particularly during seasonal survey periods.

Where planning deadlines are critical, our Fast Track Service can provide accelerated delivery to help keep your application on schedule.
  • Site Survey within 1 week available with our Fast Track service
  • Standard Lead Time two to three weeks
BNG Assessment Process Explained
A step-by-step guide to how our SAP calculation service works
Step One - Enquiry
Submit your enquiry using our quick online form or get in touch directly. We’ll review your requirements and confirm the details needed to get started.
Step Two - Information
Send us your plans, drawings, and any relevant project details. Our team will assess the information and ensure everything is in place to carry out your SAP calculation accurately.
Step Three - Report
We complete your SAP calculation and deliver your fully compliant report, ready for submission to Building Control — with fast turnaround times to keep your project moving.
BNG Assessment Information Required
To complete a SAP calculation we need the following information:
  • Full set of architectural drawings (plans, elevations, and sections)
  • Construction details (walls, floors, roof build-up)
  • Window and door specifications (sizes, types, glazing details)
  • Heating system details (boiler type, efficiency, controls)
  • Ventilation strategy (natural, mechanical, MVHR if applicable)
  • Renewable technologies (e.g. solar PV, heat pumps, etc.)
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Instant Quotation Form - Receive Quotation Within Minutes
Reports For Planning Permission Instant Quotation Form
First Name
Last Name
Email address
Phone
Post Code
Survey type
Anything else you’d like to know?
By clicking submit below, you agree to Prospect’s Privacy Policy and to receive a phone call (if a phone number was provided) from Prospect. We never share your data.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
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BNG Assessment Cost Guide
Small Sites
House extensions, single dwellings, small residential developments, and minor planning applications.
£1,375 +
Enquire now
Enquire now
Medium Sites
Small housing developments, commercial schemes, and projects requiring more detailed habitat assessments and BNG calculations.
£1,740 +
Enquire now
Enquire now
Fast Track BNG
Need your report urgently? Our Fast Track Service prioritises your project, providing accelerated delivery times to help meet tight planning, building control, and development deadlines without compromising on quality or compliance.
£2,150 +
Enquire now
Enquire now
Planning Permission Package
Save time, reduce costs, and simplify your planning application with our comprehensive Planning Permission Report Packages. We provide multiple planning reports and assessments under one roof, giving you a single point of contact throughout the process and ensuring all reports are coordinated to support a successful planning submission.
£2,500+
Enquire now
Enquire now
Package of Planning Permission Reports
Explore Our Services
Reports For Planning Permission
We provide fully compliant reports to support planning permission applications, ensuring your project meets all necessary energy and regulatory requirements. Fast, accurate, and tailored to help streamline the approval process.
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All Services
We offer a full range of energy and compliance services to support your project from planning through to completion, all delivered with fast turnaround times and expert guidance. From SAP calculations to EPCs and supporting reports, we provide everything you need in one place.
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“Gave us confidence that our home met all regulations and requirements.”
Wayne Brunswick & Sue Brunswick
Self Build Project
Case Studies
Case Studies
Streamline approvals and ensure projects progress with confidence.
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