Planning and Building Regulation
Compliance Services

About Us

Formed in 2010, JosTec (formerly RJ Acoustics) are experts in numerous Planning & Building Regulations Compliance Services. We offer Sound Insulation Testing, Acoustic Design and Consultancy for Building Regulations Part E, Air Tightness Tests, SAP Calculations, SBEM Calculations and EPCs for Building Regulations Part L1, Ventilation Testing and Commissioning for Building Regulations Part F, Water Efficiency Calculations for Building Regulations Part G, Overheating Calculations for Building Regulations Part O and all types of Noise Assessments and Surveys & Energy Statements.

Our aim is that you never need to look further than JosTec for all of your building compliance needs.

We cover all parts of England and Wales and are fully accredited/qualified in all our fields.

20+

Years of Experience

12+

Small, growing team

3000+

Satisfied Customers

Our Services

Explore our comprehensive range of services designed to help you navigate the complexities of building regulations and compliance.

Planning Services

Expert guidance and assessments for planning applications and compliance.

Design Stage Services

Comprehensive calculations and consultancy for optimal building design.

Pre-Completion Services

Professional testing and certification for building regulations compliance.

Latest News and Blog Posts

Stay updated with our latest news and blog posts. We cover a wide range of topics from building regulations to energy efficiency and sustainability.

General

The Future Homes Standard Delay Has Changed the Real Risk for Housebuilders

Fluid Labs – March 27, 2026

The delay to the Future Homes Standard has been widely reported. Implementation is now expected in 2028, pushing back what...

General

Future Homes Standard Confirmed: Timeline, Key Changes and What It Means for Housebuilders

Fluid Labs – March 25, 2026

The Future Homes Standard (FHS) has now been confirmed, with implementation set for 2028 and key transitional milestones leading up...

General

Water Is the Next “Quiet Cost” in Housing Delivery

Fluid Labs – February 25, 2026

Energy and carbon dominate the conversation in residential development. Water does not. But it should. Water efficiency requirements are tightening,...

General

Standard Assessment Procedure (SAP): Everything You Need to Know

Fluid Labs – January 29, 2026

SAP (Standard Assessment Procedure) is the UK’s method for assessing the energy performance of residential buildings and plays a key...

Air Tightness

Air Tightness Testing: Everything You Need to Know

Fluid Labs – January 29, 2026

Air tightness testing is a crucial part of delivering energy-efficient, regulation-compliant new buildings. If you’re a developer, builder or self-builder,...

Energy Efficiency

SAP vs SBEM: What’s the Difference and Which One Do You Need?

Fluid Labs – March 25, 2025

When it comes to building compliance and meeting energy performance standards, understanding the difference between SAP and SBEM calculations is...

Sound & Noise

BS4142 Noise Survey & Assessment: A Practical Guide to BS4142 Noise Assessments and Planning Permission

Fluid Labs – March 6, 2025

There are a lot of different assessments that need to be done when you’re building a property, especially if it's...

Energy Efficiency

What Are SAP Calculations? – Everything You Need to Know and More

Fluid Labs – February 18, 2025

If you’re planning a new property development, converting an existing building or building a brand new extension, you’ll need to...

Energy Efficiency General Knowledge

What is an Energy Statement and Why Do You Need One?

Fluid Labs – February 11, 2025

When you’re starting a new building project, one of the key requirements is to have an energy statement. This document...

General Knowledge

Part F of UK Building Regulations Explained

JosTec – January 21, 2025

There’s a lot that goes into building design and construction, and it’s not simply a case of designing, building and...

Ventilation

TM44 Inspections – Air Conditioning Systems Compliance

Fluid Labs – January 15, 2025

The UK may not be the warmest or sunniest place to live, but businesses and commercial buildings still rely heavily...

News

Exciting News from JosTec: Achieving Level 5 Certification in Non-Domestic Energy Assessment

Fluid Labs – November 21, 2024

We’re delighted to announce that one of our dedicated team members at JosTec has just achieved the prestigious Level 5...

General

Budget 2024: Changes to Homes, Property and Construction

Fluid Labs – November 6, 2024

Each autumn, the government’s financial plan is presented by the Chancellor of the Exchequer in the form of a budget...

General

Common Mistakes in Building Regulations Compliance and How to Avoid Them

Fluid Labs – October 31, 2024

It doesn’t matter whether you’re building an individual residential property or a much larger, commercial building, building compliance is undeniably...

General Sound & Noise