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CSH meets Part L 2013

Given that the Government intends to scrap the Code at the end of the year, it’s hardly surprising that this latest iteration of the Code contains only a few minor, essential updates, to ensure that the Code can still be used where Part L 2013 is applicable. So without further ado, here’s what’s on the cards for the Code Addendum 2014 (to give it its full name)….

Ene 1: Dwelling Emission Rate

There is a new scale to award credits for improvements over the Part L 2013 Target Emission Rate. CSH Level 3 equates to compliance with Part L 2013 (an uplift in performance from the November 2010 Guidance). Level 4 is now a 19% improvement over Part L 2013, rather than a 25% improvement over Part L 2010 as before, roughly the same performance standard. Credits are then awarded as follows, dependent on building performance.

% Improvement 2013 DER/TER England Credits Mandatory Requirements
? 6% 1  
? 12%  2  
? 19%  3  Level 4
? 32% 4  
? 44% 5  
? 56% 6  
? 70% 7  
? 84% 8  
? 100% 9 Level 5
Zero Net CO2 Emissions 10 Level 6

It is worth noting that Level 6 still equates to a “true” Zero Carbon dwelling, accounting for both regulated and un-regulated energy consumption, rather than the Zero Carbon Hubs work in progress definition, which only includes regulated energy consumption. So the standard for Level 3 will be slightly harder to achieve than before, but otherwise this new scale will have little impact on your build.

Ene 2: Fabric Energy Efficiency

FEE introduced a new performance standard for building fabric under the November 2010 Technical Guidance and has subsequently been adopted by Part L 2013 in the form of the Target FEE. There are no major changes to the Code criteria -in fact none at all really!  Credits are still awarded based on the FEE of a dwelling in the same manner as before, the only caveat being that the dwelling must meet the TFEE outlined in Part L 2013, before credits can be achieved under the Code.

Dwelling Type Credits Mandatory Levels
Apartment Blocks, Mid-Terrace End Terrace, Semi-Detached & Detached
Fabric Energy Efficiency kWh/m2/year    
? 48 ? 60 3  
? 45 ? 55 4  
? 43 ? 52 5  
? 41 ? 49 6  
? 39 ? 46 7 Levels 5 & 6
? 35 ? 42 8  
? 32 ? 38 9  
Default Cases None
Note: The performance criteria of this category differs from Approved Document L1A 2013 England. The Approved Document is based upon the ‘notional dwelling’, whilst the criteria in this category is based upon ‘absolute performance’. Credits can only be awarded when the Target Fabric Energy Efficiency requirement for Building Regulations has been met.


Ene 6: External Lighting

The Code has been updated to formally remove the reference to dedicated low energy light fittings and instead places emphasis on the performance of a bulb (this had already been done via a Technical Update a couple of years ago, but it’s good to have these things formalised). LEDs are now also included in this category and should now be suitably controlled as per the Code guidance.

Ene 7: Low/Zero Carbon Technology

The Guidance has been updated to reflect changes to SAP 2012 methodology. This has no material impact on the requirements of these credits.

Sur 1 and Sur 2

The highly contentious issue of Sur 1 has had an update - but it’s not a major one. In fact the only change is that the Guidance now refers to Planning Practice Guidance instead of the now defunct PPS25. There are no changes to any of the technical standards that are required under either Sur 1 or Sur 2.

Was 2: Construction Site Waste Management This category has been updated to reflect the fact that that the statutory requirements for SWMPs have been abolished, however the standards required to achieve credits are unchanged.

Man 2: Considerate Constructors

The Guidance has been formally updated to reflect the changes to the CCS scoring system that came into play in January 2013 (previously assessed under a Technical Update).

Transitional Arrangements

House builders will have until 30th of June to register their Code site under the November 2010 guidance without having to provide any additional information. From July 1st, you will need to provide evidence that your site is registered under Part L 2010, if it is to be registered under the November 2010 Guidance. If you can’t prove you’re under Part L 2010, then the 2014 CSH Addendum will apply. It is thus best to register any new sites to avoid any extra paperwork! So there has been nothing too dramatic and in most places, just administration updates to ensure the Code is current and can be used against all active versions of Part L. Given the light touch approach of this Addendum, it looks clear that the Code is on the way out and this update serves to paper over the cracks, until the Government decides the time is over for the Code.

Dominique Stockford

Author: Dominique Stockford

This article was published by Dominique Stockford on 02.06.2014.