Our services

We are committed to ensuring your vision is brought to life. The impact of a flawlessly executed design rests squarely on the shoulders of an equally impressive build and construction phase. This is why we work diligently to ensure we provide a seamless transition from design through to build stage.
loft conversions
Extensions
Development
Design, architectural, and structural
Finance
Loft Conversions are amongst the most popular ways to extend your home. The cost of your loft conversion will depend on a number of factors. The two key elements are the style of loft conversion you choose and the size of the your property.
Dormer loft conversion costs
Dormer conversions are relatively straightforward, they are a cheaper type of conversion. Costs typically come in at around £31,000 to £58,000 depending on the size of the conversion and other factors, with an average of around £45,000.
Hip to gable loft conversion costs
Hip to gable conversions come with added complexity which means they are typically more expensive. Costs generally start at around £42,000, going up to around £65,000, with an average of around £54,000.
Mansard loft conversion costs
Mansard conversions involve the most complexity and often involve a complete overhaul, as such, they are the most expensive option. Costs tend to start at around £45,000 going up to around £70,000, with an average cost of £58,000.
Bungalow loft conversion costs
Bungalows can be extended through the use of a loft conversion in any of the three ways mentioned above once the suitability has been determined and planning requirements met. so the costs of a bungalow loft conversion can vary from around £30,000 to £70,000.
Extensions are a popular way for families to get the most out of their homes. They are complex projects and involve a variety of different elements and trades. These include laying foundations, building walls, to plastering, electrics and plumbing - and that’s before getting to decoration, or features like adding a new kitchen. We at Imperial Construction Services can help you design your dream extension incorporating all of the modern materials and finishes such as Bi-fold and Sliding doors, Roof lanterns and open plan kitchen living spaces.

Below we have set out the most common extensions carried out in our demographic location and some approximate costs associated.
Small Extensions
3 x 5m
£30k - £40k
MEDIUM Extensions
4 x 6m
£40k - £50k
large Extensions
6 x 8m
£60k - £100k
Converting houses into flats is becoming increasingly popular. There’s a high demand for flats in London, and splitting a property into units can maximise both rental income in the short-term, and profit on sale in the long-term. We offer a full design and build package so we take on all the hassle and paperwork allowing you to focus on the end product or future plans.

Costs will vary hugely from property to property, depending on the size, the new house design, condition and the number of flats you’re converting. We’d say you will expect to pay around £35,000 per unit for a basic conversion, which would include putting up walls, installing bathrooms and central heating units.

On bigger projects with units of more than six upwards, costing can vary depending on various factors such as location, standard of finishing and barriers to building. We at Imperial Construction Services specialise in developments having done many in and around the London area, working with different boroughs and their individual requirements most importantly integrating and aligning this with your individual requirements.
We provide a comprehensive planning service. This includes initial consultations, design and layout consultations, detailed plans, structural calculations, obtaining planning approval and building regulations. We are passionate about high quality design and dedicated to providing a friendly and straightforward service.

Plans can be Prepared for Loft Conversions, Rear and Side Extensions, Sheds, Out Buildings. New Homes, Flats, Flat Conversions, Basements.

Here are three of our most used architectural package services:
loft conversion drawings For any property type
FIXED price: £2400 inc VAT
• Measured survey of the property
• Full planning or PD drawings
• All engineer's calculations
• Unlimited changes to the drawings during the design phase
• We act as your agent and submit the drawings to the council
• Make any changes requested by your council
• Non-standard loft conversions may incur and additional fee

THIS IS:
• ALL drawings your council will need
• ALL drawings building control will need
• ALL drawings your builder will need

If they need any further drawings then we will do them FREE OF CHARGE!
ground floor extension drawings for any property
FIXED price: £2900 inc VAT
• Measured survey of the property
• Full planning or PD drawings
• All engineer's calculations
• Unlimited changes to the drawings during the design phase
• We act as your agent and submit the drawings to the council
• Make any changes requested by your council
• Complicated box frame steel designs may incur an additional fee

THIS IS:
• ALL drawings your council will need
• ALL drawings building control will need
• ALL drawings your builder will need

If they need any further drawings then we will do them FREE OF CHARGE!
loft and ground floor extension drawings combined
FIXED price: £4250 inc VAT
• Measured survey of the property
• Full planning or PD drawings
• All engineer's calculations
• Unlimited changes to the drawings during the design phase
• We act as your agent and submit the drawings to the council
• Make any changes requested by your council
• Complicated box frame steel designs may incur an additional fee
• Non-standard loft conversions may cost more to design
• Price assumes both parts on same application

THIS IS:
• ALL drawings your council will need
• ALL drawings building control will need
• ALL drawings your builder will need

If they need any further drawings then we will do them FREE OF CHARGE!
We can also assist with tailored finance solutions to suit your budget and bring your dreams to fruition.

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