+44 345 6465 454
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Why would you use us?

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Same day written quotation

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100% 1st time Water Calculations pass rate

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Free calculation on where to reduce water flow

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“ATSPACE has been dealing with all of our building regulations for the last few years and we wouldn’t go anywhere else.”

Jason Howden

Fast Track Water Calculations Booked =
100% compliant in under
2 Hours

We’ve Got You Covered

With our network of
Engineers across England
& Wales

Call Now for an Instant Quote or Advice

How Much?!

At ATSPACE, we like to be as transparent as possible. That’s why we’ve provided a breakdown of our costs for every service we provide. Simply click on the filter to find out what you can expect to pay when you select ATSPACE as your building compliance partner.  


Water Efficiency Calculation(s)

Desk Based Service

Basic Water Flow rate calculations based off Floor Plans to meet Part G of the Building Regulations

No. of Plots




2-10 £47.00
11-49 £27.00
50+ £11.00
Calculated on Plot Types £67.00 Per Type
Comprehensive Calculation Requirement. Make / Model of taps and Flow rates will be required £87 Per Plot or Type
Additional Bolt On Services
SAP Calculations - Desk Base Service From £237 
U-value Calculations - Desk Base Service £29 Per U-Value

Condensation Risk Assessment -

Desk Base Service

£51 Per Assessment
PSI Values - Desk Base Service £117 Per PSI Value

Don’t See The Value We Can Add?

Please get in touch with the A-TEAM on 0345 6465 454

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Water Calculation Certified GUARANTEE
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Same Day FAST TRACK Certification
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Experts in Compliance: Est. 2008
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100% Building Control Certification

Want More?

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SAP Calculations:
For all Residential new build and conversion buildings, the approved national calculation methodology, to calculate the energy efficiency of your build and a production of an EPC

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U-value calculations:
These calculations regulate the heat loss and gain via the elements used within your construction.

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Energy Statements:
These are used at planning to demonstrate how improved energy performance can be achieved for a set requirement for CO2 reduction.

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SBEM Calculations:
For all non-domestic buildings, the approved national calculation methodology, to calculate the energy efficiency of your build and a production of an EPC

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Uncomplicated Compliance

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Elmhurst – STROMA Accredited
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Largest Knowledge Bank in our Industry
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100% Building Control Certified

Water Calculations are required criteria and relate to Part G of the Building Regulations. Water Calculations, Water Consumption and Water Calculators are all terms that come under this regulation.

The Water Efficiency Calculator will determine how efficient your build is with regards to water. It is stated in Part G that the maximum water consumption per person, per day, is 125L, inclusive of 5L of outside water. There are also other more stringent regulations where 110 L and even 90 L per person per day have been applied. The manufacturers of the taps (including baths, showers, dishwashers, washing machines, etc.) will provide flow rates. This is critical to get more of an accurate calculation, rather than using default values.

There are many ways to reduce your water consumption. For example, you might choose to recycle grey water or rainwater to use it elsewhere. Ideas such as these will reduce your water consumption. ATSPACE has delivered thousands of Water Efficiency Calculations and, in addition, provided ways to reduce your usage. If you would like to know more, please call the office on 0345 6465 454.

ATSPACE has been dealing with building compliance for over 10 years. We have a 100% success rate of passing Part G regulations and have completed over 12,000 Water Calculations in total. We are so grateful for all our customers, and we make it our mission to ensure that each and every client will return to us with any future projects they have. We strive to be the go-to compliance company for all industry professionals.

Our high first-time pass rate figure for Water Calculations is a credit to everyone who works with us!

Do you want a compliance company that delivers on their promise? Don’t let compliance be complicated. Book NOW for your Water efficiency Calculations.

Our 5 Star Reviews do the talking with over 250 + for Water efficiency Calculations.

Trusted by 9K+ businesses
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I established ATSPACE from a frustration in compliance, and I have now managed to grow it in more ways than one.

Water Calculations refer to Part G of the Building Regulations and are set out to establish the water consumption in your build. Using a water calculator will help you determine a rough estimate of your expected water efficiency. You can find one here . Many factors will be considered, such as:

  • •  No. of Bedroom

  • •  Makes – Models and Flow rates of all taps

We have:

  • •  100% First Time pass rate

  • •  FAST TRACK option for Same Day Certification 

  • It is mandatory to ensure that you comply with Part G and that your water calculation, or water consumption, doesn’t exceed what is set out in the relevant criteria. More information on this below! ATSPACE can iron out any concerns you have and answer all your questions. Water consumption doesn’t need to be confusing.

Repeat custom is something I personally strive for and is vital to ATSPACE. Returning clients means we are getting it right. Our clients are the most important aspect of our company. Without them, we have nothing to work for. We know that we deliver compliance in an easy, quick, efficient and informative way, and we take on board all feedback, both positive and negative. After all, this is how we learn!

I had a vision for ATSPACE, to make it the most informative building compliance company around, not just for our clients, but also for anyone who follows us on Social Media or keeps track of our website. Compliance doesn’t need to be complicated. Sometimes, you just need the right team!

Paul Whiffin ATSPACE
Managing Director


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Water Efficiency Calculations - Questioned Answered

How Do You Calculate Water Usage?

To Calculate your water usage you need to use a water Calculator such as this one,

Why Do I Need A Water Calculation?

A water calculator will give you insight into the water consumption of your build and show you where improvements can be made.

Where Can I Get A Water Calculation?

You can contact ATSPACE who will be able to help, or you can go direct to this site here

Case Studies

Take a look at some of the many ways we’ve helped our clients achieve building compliance success on their projects.

“ATSPACE helped simplify our water calculations and even managed to reduce our consumption. They really are the best!”

James Hill

Huge cost saving =
Water efficiency measures learned

“We have used ATSPACE for everything, on every project and each time they have managed to reduce our water consumption!”

Sam Chapman

Same day communication
Same day results =
Next day fast track certification

Customer Scope

Bring All Your Compliance Under 1 Roof. No work is Sub- Contracted out

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Whether you’re working on a residential or commercial development, rely on us to take care of all your design, consulting, compliance and certification requirements, whatever the stage of your project. When everything is under one roof, why go anywhere else?

Design & planning, part built, as built or energy certification, you can be confident that your project will meet compliance every step of the way. All work is done in-house by our team of dedicated engineers and energy assessors, so you can be sure of an efficient, thorough and top-quality service. To find out more about our multi-disciplinary service offering, simply select the service you require by clicking the icons below. In a rush? Contact us now and get put straight through to a technical expert who will handle your enquiry efficiently.

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