We specialize in a variety of extensions, including rear extensions, side returns, wraparound extensions, and double-storey additions. We work closely with you to design a space that enhances your home.

Attico serves all London areas. Contact us to confirm if we operate in your area.

Our prices may vary occasionally due to changes in material and labor costs. Currently, our quotes are valid for 30 days. Feel free to contact our team to schedule a site survey with one of our experienced surveyors.

Yes, Attico provides a comprehensive service, including design, planning permission, building regulations compliance, construction, and finishing. We take care of everything to make the process seamless for you.

Simply contact us to book a free consultation. During the consultation, we’ll discuss your ideas, assess feasibility, and provide initial advice and cost estimates.

We provide detailed and transparent quotes, work with your budget during the design phase, and maintain open communication throughout the project to avoid unexpected costs.

Attico specializes in loft conversions, home extensions, and basement conversions, providing a full range of services from design and planning to construction and finishing.

Absolutely. We assist with the preparation and submission of planning applications and ensure compliance with all local regulations.

At Attico, we provide comprehensive insurance coverage and a ten-year warranty scheme to give you complete peace of mind. If you have any questions about our commitment to quality and protection.

At Attico, we operate across London and have likely completed work in or near your area. We’re happy to provide references for you to contact or even arrange visits to completed projects, giving you a clearer idea of the type of project you’d like. Whether you’re in North, South, East, West, or Central London, we’re proud to have many satisfied clients who are pleased to share their experiences.

Attico offers all major types of loft conversions, including dormer, mansard, hip-to-gable, and Velux (roof light) conversions. We tailor the solution to suit your home and needs.

Yes, we specialize in both conversion of existing basements and new basement excavations, ensuring the space is functional, waterproofed, and fully compliant with regulations.

From signing the contract, it typically takes 4-5 weeks for clients to approve a set of plans through our architectural team. At Attico Construction, we do everything possible to expedite this process if a client is in a hurry. However, we prioritize delivering the best possible service and ensuring that clients are completely satisfied with the proposed changes and plans for their loft conversion before any work begins. Our architectural teams specialize in loft conversions across London. It’s important to note that structural calculations must be completed, and any necessary planning permission secured, before construction can commence.

Once a member of the Attico Construction architectural team has measured your space and prepared the plans, they will be submitted to your local planning department. If your design falls within Permitted Development rules, a Certificate of Lawful Development is all that’s required to begin work on your loft conversion. However, if planning permission is needed, you can expect to wait approximately 8 weeks for a decision to be made.

Planning permission: Expect a decision within 8 weeks of submitting your application, though it can take longer for more complex projects. Building regulations approval: This can take 5 to 8 weeks, depending on the complexity and the local authority's workload. Permitted Development projects typically require less time, but always check with your local council.

Basement conversions typically take 10 to 20 weeks, depending on whether excavation is required and the size of the project. More extensive excavations may take 20+ weeks.

Loft conversions: Disruption is minimal as most work is done from the outside or within the loft, lasting around 6 to 8 weeks. Extensions: Expect 8 to 20 weeks of disruption depending on size, though the impact varies by how much of your home is affected. Basement conversions: These can be more disruptive due to excavation, lasting 10+ weeks.

Attico Construction can begin building your dream loft conversion in as little as 2-4 weeks. During the recent pandemic, these timings may fluctuate due to heavy demand in the market. On average, this is the same time frame, no matter where in London your property is based e.g. North, South and West London. Please note that this timescale is estimated under the assumption that you have all of your project plans, structural designs and party wall notices already in place. If you don’t have these in place, then work on an average 2-3 months to get the plans drawn up, your party wall etc. agreed in time for the construction phase to begin. Attico Construction can cover the whole design and build process; from drawing up the plans, submitting them for approval and then building your loft conversion through our construction teams. If you already have plans and structural calculations in place, we are more than happy to quote for the construction element only.

For projects involving external work, such as extensions, poor weather conditions (e.g., heavy rain or snow) can cause delays. Always account for some flexibility in your timeline for such issues.

Most single-storey extensions take around 10 to 14 weeks, while double-storey extensions can take 12 to 20 weeks. This does not include the time for design, planning permission, or other approvals, which can add another 8 to 12 weeks.

Creating a design with an architect or builder generally takes 2 to 6 weeks, depending on the project's complexity and the number of revisions.

Most builders are booked several months in advance. It’s recommended to book your builder at least 3 to 6 months before you want the project to start, especially for larger or more specialized projects.

A standard loft conversion usually takes 6 to 8 weeks to complete. Larger or more complex conversions, such as mansard conversions, may take up to 10-12 weeks.

Hire experienced and reliable builders. Plan all necessary approvals and designs ahead of time. Maintain open communication with your contractor. Avoid making changes to the design once work has begun. Build in a contingency for unexpected delays.

Once an Attico Construction representative has visited your property and conducted a site survey, you will receive a comprehensive quotation within seven working days via email. If you do not receive your quotation within this time, please check your junk email folder and then contact our team at 0800 00 16 721. Once you have received your quotation, rest assured that it is flexible. If there’s anything you’d like to adjust—whether it’s removing or adding features or customizing the design based on inspiration from our previous work—we’re happy to make those changes. Your surveyor will guide you through the process to ensure the quote reflects your exact preferences. Don’t forget, we also offer a price match guarantee! If you find a like-for-like specification at a lower price, speak to our sales team for more information.

Yes, Attico provides full planning support. We handle the preparation, submission, and management of your planning application, ensuring compliance with all local authority requirements.

Many loft conversions, such as those under 40 cubic meters (terraced homes) or 50 cubic meters (detached/semi-detached homes), fall under Permitted Development Rights and do not require planning permission. However, you will need permission if: Your property is in a conservation area The conversion significantly alters the roofline Dormer windows exceed specified size limits

Fees vary by project type and region but typically range from £206 for household applications in the UK to higher amounts for larger developments. Additional costs for drawings or surveys may apply.

Permitted Development allows certain types of home improvements to be carried out without needing full planning permission, as long as they adhere to specific rules and limitations set by government regulations. Below are examples of how Permitted Development applies to loft conversions, basement renovations, and home extensions: Loft Conversion Examples Under Permitted Development Adding a rear dormer to increase headroom, provided the extension does not exceed 40m³ for terraced houses or 50m³ for detached and semi-detached houses. Installing rooflights or Velux windows that do not project more than 150mm from the existing roof plane. Ensuring the conversion does not extend beyond the existing roof’s highest point or alter the front roof slope facing the highway. Basement Conversion Examples Under Permitted Development Converting an existing basement into a habitable space, such as a living room or office, as long as it remains within the existing footprint of the house. Installing lightwells or small windows for ventilation, provided they do not significantly alter the property’s exterior or project excessively. Ensuring no external access points, such as new doors or staircases, are added without exceeding design constraints. Extension Examples Under Permitted Development Building a single-storey rear extension up to 3m for attached houses and 4m for detached houses, as long as it doesn’t exceed 50% of the total land surrounding the property. Adding a two-storey rear extension, provided it is no more than 3m in depth and located at least 7m from the rear boundary. Constructing a side extension that is single-storey, no more than 4m in height, and does not exceed half the width of the original house. For any project that falls outside these conditions, full planning permission will be required. Always consult with your local planning authority or experts like Attico Construction to confirm whether your project qualifies as Permitted Development.

Yes, planning permission generally expires 3 years from the date it is granted. You must begin work within this timeframe or reapply.

With planning permission, you are asking the council if your proposed scheme of works for your proposed project is acceptable. It is open to rejection by them and/or your neighbours and will have to follow the local development plan. With permitted development rights, you are asking the council to simply confirm that your scheme fits within the permitted development criteria. The council will issue you a Lawful Development Certificate if they agree. Technically, you are not required to have the Lawful Development Certificate in place before the work starts and, in fact, there is no law stating you have to have it. This means that clients who request it, are able start their project without waiting for the Lawful Development Certificate thus saving time. It is advisable to seek expert advice before assuming your project meets permitted development rights.

You can check with your local council’s planning department or search online using your council’s property search tools. Conservation areas and listed buildings have stricter rules for building projects.

Single-storey rear or side extensions within specific size limits may not require planning permission under Permitted Development Rights. You will need planning permission for: Double-storey extensions Extensions that exceed 50% of the land around your home Extensions over a certain height or size (e.g., 6m for terraced/semi-detached homes under Permitted Development)

The standard timeframe for a planning permission decision is 8 weeks from the submission of a complete application. Larger or more complex projects may take up to 13 weeks.

Basement conversions often require planning permission, especially if excavation is involved or external changes, like light wells, are planned. Existing basements converted without structural alterations may not need permission, but you will still need to comply with building regulations.

Not always. Building regulations approval is separate and ensures the work complies with safety and construction standards. You may need one or both, depending on the project.

If your application is rejected, you can either revise your plans to address the council's concerns and resubmit, or appeal the decision. Attico will work with you to modify the design or guide you through the appeal process.

Minor changes may be allowed through a non-material amendment application. Significant changes may require a new application. Always consult your local authority before making adjustments.

A typical planning application includes: Detailed drawings or plans of the proposed project A site location plan Supporting documents like a design and access statement (if required) Application forms and fees Attico can assist in preparing and submitting these documents for you.

Building without the required planning permission is a legal risk. Local authorities can issue an enforcement notice, requiring you to alter or remove unauthorized work. It’s always best to secure permission or confirmation that your project is exempt.

A party wall agreement is required if your property shares a wall with an adjoining property on either side. You must inform each neighbor of the proposed works by serving a party wall notice at least two calendar months before construction begins. This agreement is designed to protect both you and your neighbors from any issues that may arise due to work affecting the party wall. It establishes a clear understanding of responsibilities and actions to be taken in the event of a problem. By law, your neighbors have the right to request a party wall agreement before work starts. At Attico Construction, we can guide you through this process and, if needed, connect you with certified party wall surveyors to ensure everything is handled smoothly.

Timelines vary based on the project’s scope, but most room renovations are completed in 4-8 weeks.

A home conversion is a significant project, so some disruption is to be expected. However, much of the work, such as structural changes and roof modifications, is carried out externally or within the area of work itself, minimizing the impact on your daily life. Noise, dust, and temporary adjustments to access areas like staircases are common during the build. At Attico Construction, we work to minimize disruption by keeping your home as clean and accessible as possible and maintaining clear communication throughout the project. Most clients find that they can continue living in their home comfortably while the conversion is underway.

Absolutely. Loft conversions, extensions, and basement conversions can significantly increase your home’s value, often by 15-20%, depending on the quality and location.

Start by identifying your needs (e.g., more space, modern features) and consulting with us. We’ll assess your property and recommend the most suitable options.

Yes, you can have other refurbishment work completed alongside your home conversion. Many homeowners choose to combine projects, such as updating kitchens, renovating bathrooms, or reconfiguring layouts, to maximize efficiency and minimize disruption. Combining work can also be cost-effective, as it allows for shared resources and streamlined timelines. At Attico Construction, we can coordinate additional refurbishment work to ensure everything is managed seamlessly and completed to the highest standard.

The main types include: Dormer Conversion: Adds a box-like structure to increase headroom and space. Hip-to-Gable Conversion: Extends the sloping roof into a vertical wall. Mansard Conversion: Involves significant roof alterations for maximum space. Velux Conversion: Adds roof windows without altering the roof structure.

We specialize in: Existing Basement Conversions: Upgrading existing basements into functional spaces. Excavation Projects: Creating new basements where none currently exist. Waterproofing and Structural Enhancements: Ensuring durability and usability.

Common types include: Rear Extensions: Extends your home into the garden area. Side Return Extensions: Utilizes the space at the side of your property. Wraparound Extensions: Combines rear and side extensions for maximum space. Double-Storey Extensions: Adds two floors of living space.

Yes, combining projects is possible and can be more cost-effective. We’ll help you design a cohesive plan.

It depends on your property layout, budget, and goals. Loft conversions are ideal for adding bedrooms, while extensions are great for open-plan living. Basements are perfect for creating versatile spaces without altering the exterior.

Yes, you can convert your house, but the type of conversion depends on your property, its structure, and local planning regulations. Common house conversions include transforming lofts, basements, or garages into functional living spaces. Many conversions fall under Permitted Development rights, meaning you may not need full planning permission if the work meets specific criteria. However, factors like the property’s age, size, location (e.g., conservation areas), and structural integrity will play a role. At Attico Construction, we can assess your property during a site survey and advise on the best conversion options for your home.

Yes, we offer renovations and refurbishments to modernize kitchens, bathrooms, living areas, or entire properties, tailored to your preferences.