Different Types of Basements and Grades

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Different types of basement: our guide to basement grading


With space tighter than ever in many cities and towns, it’s no surprise that basements are once more gaining in popularity. As an effective way to extend your space downwards rather than outwards, structural engineer London services are doing more work on basements than ever before. But when it comes to the specifications and types of basement out there, the jargon can be confusing for the average homeowner.

Divided into specific types and grades, there’s more than one way to do a basement. But to find a solution that works for you, it pays to know what each type means – plus the benefits of picking that particular model. Perhaps you want to rejuvenate an unused space in your home. Maybe you’re considering building a brand-new basement maximise space. Whatever your need for a professionally-finished basement, we’ve got all the information you need to get started.

Read on to find out more about the different grades and types of basement – and why each type might be the best fit for your specific needs:

Type A, B and C basements

Before you get into the specialist details and information about your choice of basement, it’s best to start with the basics. For any basements that require new build planning permission London, an effective waterproofing system is needed. These different types of protection prevent basements from flooding or becoming damaged over time, which can be a severe concern for urban basement building – especially in areas like London.

These different types of water resistance are specified under BS 8102 and are necessary for anyone looking to build a safe, structurally sound basement addition to their home. So, when we talk about structural engineer services London for basements, what do these types mean? Here’s the basic rundown of the differences between each option:

Type A basements

Type A basements are defined as any basement that uses a form of barrier or membrane protection to ensure the water tightness of a basement space. This barrier may be made of specified waterproofing material combined with reinforced concrete and blockwork. The general idea of this waterproofing method is that it offers an additional layer of waterproofness to a space, as materials like brickwork and concrete may be porous or damaged by water over time.

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Type B basements

For basements using type B waterproofing, structural integrity is the primary way in which the basement is protected from water damage and ingress. This means that professional structural engineering services will be required to appropriately create a waterproofed space, using anything from reinforced concrete slabs to specialist water stop features in design work to achieve the desired results. While more involved, this method is also highly effective, where type A basements may not be a suitable solution.

Type C basements

The final defined basement type, type C basements utilise drainage protection to keep basements waterproof and damp-free. By installing and implementing cavity drain membranes, any excess water can find its way into a provided drainage system into of seeping through walls and flooring. While expensive, this solution is an excellent fit for many basements – particularly in areas where water levels are higher.

Basement grading

Alongside the waterproofing requirements specified for basement types, grading is another way in which basements can be defined under the BS 8102, as of 2009. These specific grades relate to the usage of the basement itself and provide requirements regarding each specific level or grade. This includes anything from acceptable temperatures due to wetness and humidity in the basement areas.

Four grades are defined under this scale, each of which has an increasing amount of requirements and performance levels to be suitable for use. The scale is as follows:

Grade 1 – basic utility basements

These basements can be used for plant machinery as well as car parks and worktops. Grade 1 is the lowest grade of usability on the scale, and requires far fewer specifications than other levels. Some damp and water seepage is acceptable for grade 1 basements, with specific temperatures defined for different uses where the machinery may directly affect the humidity and heat within a room.

Grade 2 – improved utility basements

Grade 2 basement is also specified for use as plant and workshop rooms; however, this grading is designed for environments that need to be drier than is possible for grade 1 structures. This means a lower humidity, no damp or water seepage, and reasonable ventilation requirements in specific circumstances. This grade of basement s also considered suitable for retail storage.

Grade 3- habitable basements

For many homes and households, this is the grade of basement required for a useable basement within your property. Designed to be used for residential and commercial purposes, grade 3 basements require the use of ventilation, as well as active dampness reduction and specific temperatures depending on the exact purpose of the room itself.

Grade 4 – special basements

For the vast majority of properties, the requirements for grade 4 basements go above and beyond their requirements. These particular basements are designed for controlled environment storage, including for archiving documents, microfilms and even valuable artwork. It’s a must for grade 4 basements to be 100% dry, with controlled humidity and temperature.

To be in-line with building regulations Wembley, as well as for the broader area of London, understanding the types and grades of buildings is the place to start. As qualified, professional structural engineers in the London area, we’re equipped with the expertise and knowledge to create basement spaces perfectly in-line with the requirements of BS 8102. This means basements that last, look great and are entirely damp-free.

If you’re interested in expanding your property downwards, then our team are the ideal people to call to get the ball rolling. We’re well-equipped to create functional, beautiful and long-lasting basement spaces for your property, in line with planning permissions and building regulations Gerrards Cross and beyond. Get in touch with AC Design Solutions today to discuss how we can maximise the space in your home with the ideal basement conversion and installation.

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After requiring a few quotes from several structural engineers i found that ac design to be the more communal and more competitive than other structural engineers on the market.After paying for my plans, I received my plans within a few days from payment. Plans seem to be very professional and as im not a builder i assume they look fairly easy to follow.But all seems vey good and good detail.It was a pleasure to work along side a professional designer and there was great communication from both parties from the start..Would definitely recommend this company and will deal with them in the near future if it comes to it......5 ⭐⭐⭐⭐⭐Excellent....
Robert Bage
Robert Bage
16:47 10 Aug 20
Zaeem was on time for our appointment and all through everyone has been professional. I will recommend ac-design-solutions anytime.
derin adesida
derin adesida
16:52 05 Aug 20
Fantastic service, fast, reliable and excellent communication. My repeat business will be given without hesitation. Glad I found AC Design Solutions. Thank you!!
Adam James
Adam James
18:53 01 Aug 20
We highly recommend AC Design Solutions who we used to design our 2 storey extension in a conservation area. We had looked at their previous work and spoken to neighbours who had previously used their services. As we live in a conservation area we wanted to hire someone who would not only understand the local requirements and regulations but also someone that had the experience and off course was reasonably priced.From first contact to final approval stage, Zaeem was extremely helpful and always made himself available to us.We highly recommend AC Design Solutions for any off your architectural planning and design requirements.
Waqar Asghar
Waqar Asghar
22:42 27 Jul 20
Prompt response and service. Would recommend. Thanks
Aysha Powell
Aysha Powell
10:28 21 Jul 20
Andrei Marin
Andrei Marin
13:26 15 Jul 20
AC Design were very quick in responding to my request, doing the inspection and deliver the report.I also found the pricing very affordable.
Daniel Malmvarn
Daniel Malmvarn
09:52 10 Jul 20
Dealt with Zubear with a couple of queries during house renovations, and he provided a very swift and professional service at a very reasonable price.
Lee Bright
Lee Bright
12:34 07 Jul 20
Very efficient, answered my query straight away
David Howard
David Howard
10:36 02 Jul 20
AC Design Solitons Ltd were introduced to us by our charter surveyors. We have used their service a few times now. Their work is of a very good standard and Mr Zaeem Chaudhry is very cooperative and understanding. There were no hidden extra charges and everything was done very professionally, at the same time with a personal touch. We had no issues in contacting Azeem. He produced our Drawings literally with in twenty four hours when we needed them quick. We have been very happy with their work, thecthe and their response. Being in the propeerty Managment we definatly be using their services frequently and would recommend them strongly.
durdana shakir
durdana shakir
09:51 25 Jun 20
We used AC Design Solutions for both our structural calculations and building regulation drawings.Both Zubear and Zaeem were super responsive and super efficient, which impressed us greatly. They were always happy to chat, provide more detail and go through any key concerns with us. We would 100% recommend. They are very good value for money and we have so far had such a positive experience with them.
Sanjay Raja
Sanjay Raja
09:57 23 May 20
Very good friendly customer service, the experienced architect help me take out a B2 license
Hider Same
Hider Same
18:37 05 May 20
AC- Designs are a very professional and efficient company. Very good value for money. Certainly recommend to friends and family. AC-designs got us planning passed for 3 apartments against very toxic neighbours. I am also using the services of AC Designs to extend our present house and then to convert into 3 apartments.
Meb Akhtar
Meb Akhtar
16:13 05 May 20
Professional company, pleasure do deal with, top quality service, thank you
Ftt Y4
Ftt Y4
16:10 05 May 20
These guys have been brilliant to work with. They were prompt with any questions I had (as it's my first planning permission application) and took care of business. I thoroughly enjoyed the whole process of working with them and highly recommend them to anyone! I certainly will be referring them to friends, family and colleagues. Thank you guys, smashing job!
Manu K
Manu K
21:02 21 Apr 20
We cannot recommend AC Design Solutions highly enough. They are very knowledgeable and highly skilled in their areas of expertise. We had drawings, structural engineering calculations and party wall work all done by them. They were one of the most competitive companies that we got estimates from, and we were a little worried that they wouldn’t be up to the mark at such competitive rates, but we needn’t have been worried. We were surprisingly astounded. Their professionalism, prompt actions and prompt responses on top of being approachable and down to earth is hard to find. I will definitely be using them again.There should be more companies like them that put the customers needs first. They were really good with understanding customers needs and requirements, and go that extra mile for customer satisfaction. I will be giving them some more planning work and aim to keep them for our other projects as and when they come up. I almost want to keep them just for my work, but credit where credit is due, and I would highly recommend using them. We found AC design solutions easy to work with, even though contact with us has been difficult due to our working hours, they worked around our times which helped so much, and made the process so much easier and painless. You can almost give them something and let them run with it, they will touch base with you as and when required and keep you informed all along the process, which gives you comfort in knowing what’s happening at every stage. Although they are a young company, they will go very far, and we wish them the very best. They are hard working and good at what they do, and deserve a good review for the work they have done for us. We would like to express a special thank you to both Zubear and Zaeem for the hard work they put into our project, and for going that extra mile for full customer satisfaction. They are a good one stop shop to cover a lot of your needs during a building project, be it a small residential or large commercial, they can actually do it all which comes in handy with one point of contact, and not dealing with a separate person for this and a separate person for that. It’s all about the one stop shop which they cater to. Good luck with your project, and we would recommend using AC Design Solutions to help as building projects can get stressful, and they just help make the whole process a lot easier.
Vin
Vin
18:28 19 Feb 20
I have been dealing with AC Design for party wall agreement and i would recommend to anyone. Quick response even I sent emails over the weekend. Very professional and friendly team especially Zubear and Zaeem. Thank you again for everything.
dariusz wadowski
dariusz wadowski
21:53 12 Feb 20
Helped us with a very difficult and extensive alterations application with. I never had to worry because I always felt I was in good hands. Thank you.
Veronica Martins
Veronica Martins
09:41 26 Jan 20
Ac design solutions Ltd are a team of dedicated professionals. Zaeems outstanding knowledge of construction along with planning laws are amazing.Zaeem understood our requirements and delivered accordingly in fact he came out a few times without hesitation to advise and deliver accordingly, enabling us to move forward with the project.We would highly recommend AC Design Solutions Ltd to anyone looking to build.
Candy Zone
Candy Zone
13:46 21 Jan 20
I recently dealt with AC Design Solution to carry out my Party Wall agreement. I was very impressed with the level of service I received. All correspondences were dealt with promptly and was kept informed all along the process.I would definatley be using their services again and have already recommended them.
Anil Vekaria
Anil Vekaria
12:14 21 Jan 20
I have been dealing with AC Design solutions over two years now. The team is friendly and cooperative, they are committed to excellent quality and delivering on time.
Firas Awad
Firas Awad
17:32 14 Jan 20
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Romeo Popescu
Romeo Popescu
08:35 13 Oct 19
Efficient and professional. We used them as a one stop shop for Party Wall, Discharges, Structural and Building Control drawings. They really know their stuff and have good contacts. They even helped with stuff outside of their scope without any extra cost.
Hassan El-Kassir
Hassan El-Kassir
20:55 22 Aug 19
Needed a Party wall surveyor and AC Design came recommended by a local construction expert. Excellent company. Knowledgeable, experienced, hard working (often out of hours to meet my tight deadline) and friendly. Always available and responsive to my queries. Cost for service extremely competitive. No hesitation in recommending.
Tarique Musa
Tarique Musa
09:07 19 Apr 19
Had a very good experience with Developing drawings and drafting Party wall agreements . Zaeem was always at hand to answer any questions no matter how trivial and expedited a party wall agreement effectively and in a very timely manner. Even our neighbor had a great experience and felt that AC Design were through and professional. Would highly recommend their service.
mustafa rasheed
mustafa rasheed
20:39 10 Apr 19
Zaeem is the cream of the crop in what he does. He takes the time to understand what your needs are and delivers comprehensively on his promises in a timely manner. He is always helpful and he really knows his game.Overall ..EXCEPTIONAL.If you're looking for someone reliable, reachable, and ready to help you trust your gut and go with Zaeem.
Ali Asghar
Ali Asghar
19:46 18 Sep 18
I appointed AC Design Solutions to obtain planning permission for a flat conversion, after having been let down by another architect, who took the money but did not not complete the job.I have been happy with Zaeem's work. I find that I can always get in touch with him and he always tries to resolve problems as soon as possible. He has dealt with Ealing Council Planning Department effectively on many occasions. He completed as many revisions as the Council demanded, even when they were being unreasonable and dragging out the whole process.I find Zaeem professional and conscientious as such I would definitely recommend him in the future.
B Pavlou
B Pavlou
11:09 04 Aug 18
I am really happy with your service. I would recommend to my friends and family.
Vairavappillai Jeganathan
Vairavappillai Jeganathan
22:55 03 Aug 18
Good and speedy service. I would definitely recommend to my friends and family.
Shahina Mendonca
Shahina Mendonca
18:59 03 Aug 18
I found AC Design solutions very friendly, competitive and always available to discuss the project. Great service!
Niraj Chag
Niraj Chag
20:52 04 Jul 18
Great communication, provides us full supports with several existing projects and future projects. Definitely would recommend this company to anyone needs an architect!!
Chris Wang
Chris Wang
17:19 04 Apr 18
I have used their services for my house extension work(inlc design of floor plan, structure plan, planning permission for the extension), I have found them very friendly, helpful and professional. They have guided me very well for all steps during the project, would highly recommend them for their services.
Irfan Munir
Irfan Munir
15:55 06 Oct 17
I employed AC Design Solutions as I saw there previous work and was local to where I currently work. My house is located in the Ealing Borough it is a Semi Detached house. At the time I instructed AC Design Solutions i was getting an idea of what we want. They advised me on the layout of the interior and what would be cost effective. This was my first property and is the very first time I am planning to carry out a project like this. I didn't know any costs to how much things would cost. AC design solutions listened to my ideas and then gave me a break down on the best way to go about doing things and to keep the cost down. They put in plans for a 6 metre extension and a loft conversion which recently obtained approval and I am very happy with the service. I can count on them to do a good job. I have referred them to other families and friends.
Abdul Choudhury
Abdul Choudhury
15:36 17 May 17
Exceptional service, very polite and professional, knew what he was talking about. Guided me through the whole process. Live in Acton and Zaeem drew some plans for a single storey and done building regulations. Could not ask for more the whole process went through very smoothly.The 3 meters extension had uneven floor and had drains running through where the foundation was to be dug. Before employing AC Design Solutions I contacted a few other firms and did my due diligence. When they came no one mentioned to me regarding the issue with the drains and how the trees would affect the build. When AC Design Solutions came around first thing they did is look around the property and noted points for concerns which wereProximity of treesThe drains where the foundation would be dug. Another underlying issue they pulled out on was I had a two storey side extension already built and needed I needed a gable on the side to allow for enough headroom for the staircase. I am really happy with service and have recommended them to friends and family.
M K
M K
12:06 09 May 17
Plan agreed to my vision and passed.
praful kothari
praful kothari
17:55 12 Mar 17
Best work
Gagan Kumar
Gagan Kumar
15:38 03 Mar 17
Great service, drawings were done on time and submitted to council and approved with no issues. Would recommend.
sunny wmz
sunny wmz
21:15 23 Feb 17
gul deep
gul deep
11:43 20 Feb 17
1) Zaeem worked on my house extension and appeal successfully.2) Call out - has been Good3) Approachable and always hear what client say.4) Pricing - Competitive5) I am giving 4 1/2 stars as he is still young & can improve in review the designs with the client before submission. I will give job again to Zaeem for my house planning. ThanksSuresh Karanam
Suresh Babu
Suresh Babu
12:30 19 Feb 17