gradwellenviroment@gmail.com
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SAP Calculations For New Build, Extensions & Conversions

We understand that time matters. Submit your details and we’ll provide a clear, competitive quotation without delay.
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24 HouR TURNAROUND
Instant Quotation Form - Receive Quotation Within Minutes
First Name
Surname
Email address
Phone
Post Code
Project type
Number of dwellings
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.
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What is the Lead Time
Teams using Prospect automate the busywork and stay focused on what drives results.
Report Example
From fast-moving startups to growing teams, Prospect handles scale without slowing down.
Client Success
No more digging through dashboards. Prospect surfaces the right signals instantly.
How much will it cost
Teams using Prospect automate the busywork and stay focused on what drives results.
How It Works
From fast-moving startups to growing teams, Prospect handles scale without slowing down.
Instant Quotation
No more digging through dashboards. Prospect surfaces the right signals instantly.
Helping developments meet modern environmental standards.
From initial environmental assessments through to full remediation, we provide practical, cost-effective solutions tailored to each project. Our experienced team works closely with clients to identify risks, ensure compliance, and deliver reliable environmental services that keep projects moving forward.
100%
Report Approval by Local Authorities & Building Control
Specialist environmental services tailored to your project requirements. From site assessments and investigations to remediation and compliance support, we deliver practical solutions that help manage environmental risks and keep your project moving forward.
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.
Trusted by Developers & Designers
Supporting Projects from Concept to Completion

We work closely with developers, architects, contractors and homeowners to deliver clear, reliable support at every stage of a project. Our focus is simple — provide accurate advice, respond quickly, and help clients move forward with confidence.

From small residential schemes to multi-unit developments, we understand the importance of deadlines, coordination, and practical solutions. That’s why many of our clients return to us for ongoing support across multiple projects.
Architects & Designers
We work alongside architects and design teams to ensure projects meet compliance requirements without compromising design intent. By reviewing specifications early, we help identify potential issues before submission, reducing the risk of costly redesigns or delays.
Property Developers
We support developers across single dwellings and multi-plot sites, delivering reliable assessments that align with build programmes. From feasibility advice through to final certification, we provide straightforward guidance that keeps projects compliant and on schedule.
Homeowners & Self-Builders
If this is your first project, we make the process simple. We explain what’s required, what documents are needed, and how to achieve compliance without unnecessary upgrades.
Our aim is to provide clear advice and dependable support so you can move through Building Control with confidence.
Builders & Main Contractors
We work closely with builders and contractors to ensure compliance aligns with on-site delivery. If specifications change during construction, we provide practical guidance and fast updates to avoid delays at completion.
“Quick turnaround and great support throughout the process.”
Case Studies
Case Studies
Streamlining their financial forecasting with AI.
87% reduction in reporting time since switching to Prospect.
Case Study
Case Study
“Before Prospect, our team was drowning in reconciliation tasks that ate into our evenings and weekends. Now, everything syncs automatically and we can wrap up monthly close in a fraction of the time.”
Lisa Q.
Design Director
Sap Calculation Lead Time
Our typical SAP calculation turnaround is 2–5 working days, depending on project size and complexity. Single dwellings are usually completed within a few days once full drawings and specifications are received, and faster turnaround can be arranged if you're working to a tight deadline.
  • Urgent projects 24 hour turnaround available
  • Extension Lead time 3 working days
  • New Build Lead time 5 working days
Enquire Now
Enquire Now
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Rated 4.97/5 from 500+ completed projects
Our SAP Calculation Process
Request a Quote
Request a Quote
1. Submit an Enquiry
Provide your architectural drawings, construction details, and M&E specification. If anything is missing, we’ll let you know exactly what’s required.
2. Quotation & Instruction
We review the project and issue a clear, fixed quotation with confirmed turnaround times. Once accepted, we formally instruct the assessment and schedule the work.
3. Design Stage SAP Assessment
We complete your SAP calculations based on the proposed build specification to assess compliance with Part L of the Building Regulations.
4. Compliance Review & Advice
If improvements are required, we provide practical, cost-effective recommendations to achieve compliance without unnecessary overspend.
5. As-Built Update
Following construction, we update the SAP assessment to reflect the final specification, including air test results and any on-site changes.
6. Final Certification & EPC
We issue your As-Built SAP report and lodge the EPC, ensuring everything is in place for Building Control sign-off and completion.
SAP Calculation Cost Guide
Extensions
We provide SAP calculations for extensions where required, ensuring your project meets current Building Regulations standards. Prices from:
£175
Enquire now
Enquire now
New Build
Our SAP calculations for new builds demonstrate full Part L compliance at both design stage and completion.
Prices from:
£195
Enquire now
Enquire now
Conversion
We deliver SAP assessments for property conversions, helping you achieve compliance when changing the use of an existing building. Prices from:
£175
Enquire now
Enquire now
New Build Package
Our comprehensive new build SAP package includes Design and As-Built calculations, EPC, Water Efficiency (Part G) calculations, and Overheating Assessment (Part O) to ensure full Building Regulations compliance.
£310
Enquire now
Enquire now
Package of New Build Services
  • SAP / BREL
  • Part G - Water calculations
  • Part O - Overheating
  • Air Tightness testing
Detailed & Accurate Documentation - Example Reports
New Build Example Report -
Holtby Rise
View an example of our new build SAP report, demonstrating full Part L compliance and the documentation issued at design and as-built stages.
See Integrations
See Integrations
Extension Example Report - Wentworth Way
View an example of our extension assessment, showing how we support Building Regulations compliance where SAP calculations are required.
Explore Insight
Explore Insight
Related Services
Prospect evolves with you, learning your patterns and pushing what’s next into now.
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Energy, Sustainability & Compliance
Anticipate what’s next with confidence. Prospect blends AI-driven models with your real-world context to offer projections you can trust.
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Ecology
No more waiting on reports or digging through dashboards. Prospect surfaces the right signals instantly, so you’re never a step behind.
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Need some help?
We’re here to provide support and assistance.
Contact our team
Contact our team

Environmental Expertise for Every Project

Safe, Compliant & Responsible
Supporting compliance with evolving environmental regulations.
Whether you have a question, need a quote, or just want some advice, complete the form below and we’ll be in touch shortly.
“We pride ourselves on responding quickly and providing clear, practical advice. No matter the size of your enquiry, our team is here to help you find the right solution.”
Charlotte Emmerson
Head of Operations
Provide a few details about your enquiry and we’ll come back to you with the information you need. The more detail you include, the better we can help.
Instant Quotation Form
Full Name
Email address
Phone
Project type
Number of dwellings
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.
common questions
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Prospect evolves with you, learning your patterns and pushing what’s next into now.
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Can I use Prospect with my current tools?
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Yes—Prospect is built to integrate seamlessly with the platforms you already rely on. From data sync to workflow triggers, we support popular tools out of the box and offer API access for everything else.

Whether you’re using Slack, Notion, Google Workspace, or something more specialized, Prospect fits into your stack without disrupting it. We believe software should meet you where you are—not the other way around.
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How long does setup take?
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Most teams are set up in under an hour. We’ve designed Prospect to be intuitive from the start—no need for lengthy onboarding sessions or technical hand-holding. Just connect your data sources, set your preferences, and your workflows are ready to go. Our team is always on hand if you want help, but most users don’t need it.
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What happens if I outgrow the Free plan?
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The Free plan is designed to get you started, but when your needs grow, Prospect scales with you. Upgrading is seamless—no data loss, no reconfiguration. You’ll instantly unlock more automation, more integrations, and advanced features to help your team stay ahead. We’ll even guide you through the transition to make sure nothing gets missed.
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Is my data secure with Prospect?
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Security is a non-negotiable. Prospect uses end-to-end encryption in transit and at rest, along with advanced identity management features like SSO, 2FA, and granular role permissions. We also run regular audits and work with trusted infrastructure providers to safeguard every layer of your data. You own your data, and it’s never used or shared without your consent.
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Are our company secrets protected with Prospect?
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Yes—confidentiality is central to everything we build. Whether it’s financial reports, internal notes, or sensitive forecasting data, it stays strictly yours. We don’t access or analyze your information unless explicitly requested for support. Our platform is used by companies with strict compliance needs, and we meet or exceed industry security standards.
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Does Prospect support teams in different time zones?
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Absolutely. Prospect is built for global teams with asynchronous schedules. From workflow notifications that adjust to local time, to real-time collaboration that doesn’t require everyone to be online at once, we make working across time zones feel natural. You can set time-aware triggers, assign reviewers by region, and keep your processes running smoothly around the clock.
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Can I cancel or change plans anytime?
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Yes—your plan is always in your control. Downgrade, upgrade, or cancel without needing to contact support or jump through hoops. Your settings and data are preserved, so if you return later, you can pick up right where you left off. We believe in earning your trust, not locking you in.
Contact us
Contact us
Is my data secure with Prospect?
Chevron down icon
Security is a non-negotiable. Prospect uses end-to-end encryption in transit and at rest, along with advanced identity management features like SSO, 2FA, and granular role permissions. We also run regular audits and work with trusted infrastructure providers to safeguard every layer of your data. You own your data, and it’s never used or shared without your consent.
Contact us
Contact us
What happens if I outgrow the Free plan?
Chevron down icon
The Free plan is designed to get you started, but when your needs grow, Prospect scales with you. Upgrading is seamless—no data loss, no reconfiguration. You’ll instantly unlock more automation, more integrations, and advanced features to help your team stay ahead. We’ll even guide you through the transition to make sure nothing gets missed.
Contact us
Contact us
Can I use Prospect with my current tools?
Chevron down icon
Yes—Prospect is built to integrate seamlessly with the platforms you already rely on. From data sync to workflow triggers, we support popular tools out of the box and offer API access for everything else.

Whether you’re using Slack, Notion, Google Workspace, or something more specialized, Prospect fits into your stack without disrupting it. We believe software should meet you where you are—not the other way around.
Contact us
Contact us
Does Prospect support teams in different time zones?
Chevron down icon
Absolutely. Prospect is built for global teams with asynchronous schedules. From workflow notifications that adjust to local time, to real-time collaboration that doesn’t require everyone to be online at once, we make working across time zones feel natural. You can set time-aware triggers, assign reviewers by region, and keep your processes running smoothly around the clock.
Contact us
Contact us
How long does setup take?
Chevron down icon
Most teams are set up in under an hour. We’ve designed Prospect to be intuitive from the start—no need for lengthy onboarding sessions or technical hand-holding. Just connect your data sources, set your preferences, and your workflows are ready to go. Our team is always on hand if you want help, but most users don’t need it.
Contact us
Contact us
Can I cancel or change plans anytime?
Chevron down icon
Yes—your plan is always in your control. Downgrade, upgrade, or cancel without needing to contact support or jump through hoops. Your settings and data are preserved, so if you return later, you can pick up right where you left off. We believe in earning your trust, not locking you in.
Contact us
Contact us
Are our company secrets protected with Prospect?
Chevron down icon
Yes—confidentiality is central to everything we build. Whether it’s financial reports, internal notes, or sensitive forecasting data, it stays strictly yours. We don’t access or analyze your information unless explicitly requested for support. Our platform is used by companies with strict compliance needs, and we meet or exceed industry security standards.
Contact us
Contact us
Does Prospect support teams in different time zones?
Chevron down icon
Absolutely. Prospect is built for global teams with asynchronous schedules. From workflow notifications that adjust to local time, to real-time collaboration that doesn’t require everyone to be online at once, we make working across time zones feel natural. You can set time-aware triggers, assign reviewers by region, and keep your processes running smoothly around the clock.
Contact us
Contact us
What happens if I outgrow the Free plan?
Chevron down icon
The Free plan is designed to get you started, but when your needs grow, Prospect scales with you. Upgrading is seamless—no data loss, no reconfiguration. You’ll instantly unlock more automation, more integrations, and advanced features to help your team stay ahead. We’ll even guide you through the transition to make sure nothing gets missed.
Contact us
Contact us
How long does setup take?
Chevron down icon
Most teams are set up in under an hour. We’ve designed Prospect to be intuitive from the start—no need for lengthy onboarding sessions or technical hand-holding. Just connect your data sources, set your preferences, and your workflows are ready to go. Our team is always on hand if you want help, but most users don’t need it.
Contact us
Contact us
Is my data secure with Prospect?
Chevron down icon
Security is a non-negotiable. Prospect uses end-to-end encryption in transit and at rest, along with advanced identity management features like SSO, 2FA, and granular role permissions. We also run regular audits and work with trusted infrastructure providers to safeguard every layer of your data. You own your data, and it’s never used or shared without your consent.
Contact us
Contact us
Are our company secrets protected with Prospect?
Chevron down icon
Yes—confidentiality is central to everything we build. Whether it’s financial reports, internal notes, or sensitive forecasting data, it stays strictly yours. We don’t access or analyze your information unless explicitly requested for support. Our platform is used by companies with strict compliance needs, and we meet or exceed industry security standards.
Contact us
Contact us
Can I use Prospect with my current tools?
Chevron down icon
Yes—Prospect is built to integrate seamlessly with the platforms you already rely on. From data sync to workflow triggers, we support popular tools out of the box and offer API access for everything else.

Whether you’re using Slack, Notion, Google Workspace, or something more specialized, Prospect fits into your stack without disrupting it. We believe software should meet you where you are—not the other way around.
Contact us
Contact us
Can I cancel or change plans anytime?
Chevron down icon
Yes—your plan is always in your control. Downgrade, upgrade, or cancel without needing to contact support or jump through hoops. Your settings and data are preserved, so if you return later, you can pick up right where you left off. We believe in earning your trust, not locking you in.
Contact us
Contact us
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