Retrofit Assessments in South East England
A retrofit assessment shows where your home is losing energy and what can realistically be improved. We look at the building, how it performs and how it is used, then break it down into clear, practical steps to cut waste, lower bills and improve comfort, with assessments carried out in line with PAS 2035 guidance.
- Experienced, independent surveyors who are members of RICS, RPSA, CIOB and FODCS.
- Whole-house energy assessments supported by thermal imaging technology.
- Assessments for individual homes, rental properties and larger housing portfolios across South East England.
- Instructed by homeowners, landlords, buyers and social housing providers.
- Detailed written reports with clear priorities, written in plain English for non-specialist readers.
- Book Your Survey

- About Retrofit Assessment
What Is an Retrofit Assessment?
A retrofit assessment is a detailed check of how your property behaves in real conditions. Not just how it was designed to perform on paper, but how it actually performs day to day, with the heating running, the rooms in use and the weather doing what it does.
The assessment looks at the building as a whole system. Heat loss, insulation gaps, ventilation issues and the condition of the fabric are considered together, because improving one element in isolation can easily create problems somewhere else. That whole-house view is what separates a proper assessment from a quick energy check.
You end up with a clearer picture of where the property is underperforming and why, along with a clear, sensible order for putting it right. Whether the aim is lower bills, a warmer home or preparing for planned upgrade works, it gives every decision that follows a genuinely solid starting point.

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- What Happens
What Happens During a Retrofit Assessment?
Most of the work is straightforward on the surface, but the value is in connecting the details. Small things often explain bigger problems.
Energy Performance Evaluation
Building Fabric Analysis
Occupancy Assessment
Condition Survey

- Why Choose Us
Why Choose Us for Your Retrofit Assessment
Most retrofit advice sounds good on paper but falls apart when applied to a real building. We keep things grounded. You get a proper look at how the property is performing, without the jargon or overcomplication that usually gets in the way. What you receive from us is simple and usable on site:
- Clear explanation of where energy is being lost and why it matters
- Practical recommendations that fit the building, not generic advice
- Energy bills are rising without a clear reason
- Surveyors who understand both older and modern property types
- Straight answers instead of padded reports
- A focus on what will genuinely improve comfort and reduce waste
- Support that does not disappear once the report is delivered
If something is not worth doing, we will say so. If something is urgent, that is highlighted too.
- Benefits
Who Benefits from a Retrofit Assessment?
It is useful in more situations than people think, and not just for energy-focused projects.
Homeowners
If bills are creeping up or the house never feels quite comfortable, this gives you a starting point that actually makes sense.
Landlords and Property Managers
It helps you plan upgrades without wasting budget on guesswork, and is particularly useful for prioritising which properties need attention first.
Buyers and Investors
Before committing to a purchase, it helps to know what kind of energy work you are walking into. Some properties look fine until you dig deeper.
Large Property Portfolios and Social Housing
When multiple buildings are involved, you need a clear way to rank what needs doing first. This provides that structure, in line with the approach funded retrofit schemes expect.

- Service Area
Professional Retrofit Assessment Specialists Across South East England
We provide retrofit assessments across South East England, including Buckinghamshire, Bedfordshire, Hertfordshire, Surrey, Oxfordshire, Berkshire and surrounding areas, with dedicated location pages to help you find the services available near you. We work across all types of housing, from older solid wall properties to newer builds that still have efficiency issues. If you are in the region, the chances are we are already working nearby most weeks.
Buckinghamshire
Hertfordshire
- Client Feedback
What Clients Say About Fitzgerald Surveying
The feedback below has been shared by clients following their retrofit assessments, highlighting their experience with Fitzgerald Surveying Services and the quality of our professional advice.
Posted on Google![]()
Miranda TuszynskiTrustindex verifies that the original source of the review is Google.
A very detailed survey, including photos Marshall was very helpful explaining any concerns I hadPosted on Google![]()
Matthew HTrustindex verifies that the original source of the review is Google.
Thanks for the highly detailed RICS level 2 survey which gives us confidence ahead of our purchase. Very much appreciated.Posted on Google![]()
Lisa BidaTrustindex verifies that the original source of the review is Google.
Jake prepared a very thorough Level 3 Home Survey report for us. He booked it in quickly with the estate agent and we really appreciated how quickly he was able to get it back to us.Posted on Google![]()
emma kehoeTrustindex verifies that the original source of the review is Google.
I recently arranged a level 3 survey on a grade 2 listed property. From start to finish, they were extremely easy to deal with, professional and efficient. Would thoroughly recommend! Thank you.Posted on Google![]()
Robert PayneTrustindex verifies that the original source of the review is Google.
The team carried out a RICS level 3 plus survey on a property we are looking to buy. Great communication from start to finish and very thorough report that ensured we were fully informed on the property. Thanks!Posted on Google![]()
Bijal PatelTrustindex verifies that the original source of the review is Google.
Jake did a fantastic job with our Level 3 Home Survey. He was professional, knowledgeable, and incredibly helpful throughout the entire process. While we were on holiday, he took the lead in organising both a drain survey and a structural survey, which made everything much less stressful. Jake also took the time to thoroughly review all the documents and promptly responded with clear, detailed feedback whenever needed. His communication and attention to detail were excellent, and it was clear that he genuinely cared about helping us make an informed decision. It was a pleasure working with Jake and the team. I would 100% recommend their services to anyone looking for a reliable and professional surveyor. Thank you, Jake! āāāāāPosted on Google![]()
Geraint Talbot-DaviesTrustindex verifies that the original source of the review is Google.
Prompt and efficient delivery of a comprehensive building survey. Even better though was their after service care to clarify and amplify key points to follow through on.Posted on Google![]()
Pierre TheoTrustindex verifies that the original source of the review is Google.
Great communication throughout the process. The team provided a well drafted and thorough survey. Highly recommend.Posted on Google![]()
Edison BakalliTrustindex verifies that the original source of the review is Google.
Excellent service from Mitchell. The survey was thorough, professional, and delivered promptly. The report was clear and easy to understand, helping me make informed decisions. Highly recommended for anyone looking for a reliable and knowledgeable property surveyor.Posted on Google![]()
Katie HullTrustindex verifies that the original source of the review is Google.
We had an extremely thorough RICS Level 3 plus survey done on an old property we are buying. We were very impressed by the detail of survey and communication. Would thoroughly recommend!
- Our Process
From Booking to Retrofit Assessment Report in 4 Clear Steps
Whether the aim is lower running costs, a more comfortable home or a structured plan for future upgrades, our process provides a clear route from the initial enquiry through to the completed report.

Discuss Your Requirements
We begin by talking through the property, how it is used and what has prompted the assessment. This helps establish the scope of the survey before the visit takes place.
Arrange a Suitable Assessment Date
Once instructed, we arrange a convenient time to visit the property, working around your availability and, where relevant, tenant access.
On-Site Retrofit Assessment
The surveyor evaluates the building fabric, heating and energy performance, ventilation and overall condition, using thermal imaging where appropriate and recording the observations made during the visit.
Receive Your Retrofit Assessment Report
Shortly after the visit, you receive a detailed report setting out the findings, priorities and practical recommendations arising from the assessment.
- FAQ
Retrofit Assessment Questions, Answered
Retrofit is an area full of competing advice, and it is not always clear where to start. The answers below cover the questions we are asked most often before a retrofit assessment is arranged.
An EPC gives you a rating. A retrofit assessment explains the reasons behind that rating and what can actually be done to improve it, taking into account how the building is constructed and how it is used.
Usually a few hours, depending on the size of the property. Larger or more complex homes take longer, though the assessment is normally completed in a single visit.
In some cases, yes. The findings can help support applications for energy efficiency funding schemes, depending on what is available at the time and the criteria that apply.
Not always. Many upgrades fall under permitted development, but some changes do need approval depending on the scope of the work and the property itself. Anything likely to need it is flagged in the assessment.
It depends on the property. Size, condition and complexity all play a part. We confirm the cost upfront before anything is booked, so there are no surprises later. Contact Fitzgerald Surveying for a quotation based on your details.
Get In Touch
Buying a property? Get independent advice before you commit. Our RICS surveyors provide clear, detailed reports through Level 1 Condition Surveys, Level 2 Homebuyer Surveys, and Level 3 Building Surveys, helping you identify potential defects and make a more informed purchase decision. Contact our team today for expert property survey advice.
63 New Road, Weston Turville, Aylesbury HP22 5QY
enquiries@fitzgeraldsurveying.co.uk
0333 2249 516