Self-build home: Appoint a range of contractors and suppliers to construct the home
Where a self builder intends to co-ordinate the purchase of goods, materials and labour themselves, they may benefit from the services of a project manager or construction manager. This method of procurement carries with it the greatest risk in terms of keeping to budget and programme because responsibility is fragmented among many parties. The biggest challenge is sequencing the work in a way that minimises return visits and potential disruption. Problems of synchronisation can result in delays and claims for non-productive time.
When deciding how to divide the works into separate trade packages, the interfaces between packages must be carefully considered and constantly monitored. Elements can fall between packages (for example the flashing to a rainwater outlet). Responsibility and consequent liability for each element of the works must be clearly defined.
- Existing relationships.
- During the design process.
Discussing the works with suppliers and contractors during the design process, before appointing them, can help identify those that are most helpful and can also highlight potential problems. Contractors and suppliers might also be able to suggest alternative approaches based on their experience.
Discounts may be available from suppliers, particularly for large orders (this may make it worth buying a range of items from a single supplier), or by registering with organisations such as the self-build portal to benefit from group discounts. See Self-build homes negotiating discounts for more information.
- Requests for quotations.
- Submitted proposals and prices.
- Confirmation of orders, prices and delivery.
- Delivery receipts.
- Invoices (separating the VAT element on the direct purchase of materials).
- Accompanying product literature such as; assembly instructions, operating manuals, spares and consumables information, maintenance and repair depots.
- A ledger recording all payments and financial commitments.
- Receipts of payment.
Other issues to address when obtaining quotations and placing orders include:
- Allowing for cutting and wastage.
- Purchasing spares and consumables to take full advantage of purchasing power.
- Obtaining warranties wherever possible.
- Obtaining servicing and maintenance quotes at the same time to take advantage of competitive leverage. This might include; boiler plant, heat exchangers, security systems, sewage treatment systems, automatic gate systems, garden maintenance and so on.
NB Self-build homes and the conversion of non-residential buildings into dwellings may qualify to reclaim VAT paid on eligible building materials and services. See VAT refunds on self-build homes for more information.
NB Self-build clients are ‘domestic clients’ for the purposes of the Construction (Design and Management) Regulations (health and safety regulations generally referred to as the 'CDM Regulations'), and so the client's duties under the regulations will generally fall to the contractor on a project where there is only one contractor or to the principal contractor on a project where there is more than one contractor. However self-build clients can attract health and safety duties under Part 4 of the Regulations if they control the way in which construction work is carried out. See CDM for self-builders and domestic clients for more information.
Featured articles and news
In the week of the momentous Heathrow decision, we look back at the development and design of T5.
BSRIA’s flagship event will address performance and wellbeing beyond compliance.
Young Architects and Developers Alliance launched to build the relationship between the two disciplines.
BS 8536-2:2016 Design and construction: Code of practice for asset management (Linear and geographical infrastructure).
Paying for off-site goods or materials can be useful, but it puts the client at risk.
People power can be transformative if properly informed and inspired.
ZHA win competition to build an Urban Heritage Administration Centre in Saudi Arabia.
Leaps, not steps, are needed to avoid a ticking time bomb, say BRE in response to Farmer Review.
A multi-purpose hall in France covered in a translucent orange membrane.
Winning designs revealed for a rock formation-influenced residential complex in Rennes.
An article explaining the techniques, regulations and environmental impacts of carbon capture and storage.
Watch one of the first documentaries by the acclaimed Adam Curtis, examining the substandard system building of the 1960s.