Roof form and structure
Rafters, purlins, ridges and existing supports affect where new structure can be introduced. Structural design should be resolved before dependent work begins.
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At New Line Construction Ltd we specialise in enhancing and adding value to beautiful period homes in West London.
A loft conversion should add useful floor area without creating an awkward room at the top of the house. Headroom, stairs, daylight, storage, insulation and services all need to work together.
Our builders in West London can coordinate this work with house refurbishment in West London as part of a wider improvement to your home.
New Line Construction Ltd undertakes loft conversions in Kensington for homeowners who want to turn underused roof space into a bedroom, office, en-suite, guest room or private suite. We coordinate the structural work, insulation, windows, electrics, plumbing, joinery and final finishes as one programme.
Homes in Kensington vary considerably. The right solution starts with the existing roof form, available headroom, staircase position and the way the new floor should connect with the rooms below.


A loft can look generous on plan and still feel compromised if the useful standing area, access route or furniture positions are not tested early.
Rafters, purlins, ridges and existing supports affect where new structure can be introduced. Structural design should be resolved before dependent work begins.
The staircase affects both the loft and the floor below. Its position should protect circulation, headroom and useful room area on each level.
Roof windows, dormers and other openings should provide light and ventilation without creating difficult furniture zones or unnecessary overheating.
Low eaves can become useful fitted storage, helping keep the main standing area clear and reducing wasted space.
Dormer, rooflight and other loft conversion arrangements each change the balance between usable floor area, external appearance, cost and construction complexity. The appropriate option depends on the individual property and any planning or design constraints.
We do not assume that the largest intervention is automatically the best one. The aim is to create a room that works in daily use and feels connected to the rest of the house.
We commonly work with period properties where proportions, staircase design, natural light and integration with the existing interior are especially important. Existing alterations, chimney positions, roof geometry and neighbouring properties can all influence the practical solution.
For the wider service, see loft conversions in West London.
Decide how the new floor should be used and which functions matter most.
Check roof geometry, access, services and visible constraints.
Coordinate structure, openings, insulation, stairs and room layout.
Sequence structural work, services, joinery and finishes.
Review details and completed areas before handover.
Cost depends on roof structure, conversion type, staircase design, structural steelwork, windows, insulation, electrical and plumbing requirements, bathroom specification, fitted joinery and the final standard of finish.
A meaningful quotation follows a defined scope. Allowances should be clear where products have not yet been selected.
If the priority is additional ground-floor area, see our house extension in Kensington. If the existing property needs wider structural or service changes, explore house renovation in Kensington.
Comparing the options early can prevent spending on one part of the property before the wider plan is clear.
Some loft conversions can fall within permitted development rules, while others may require planning permission. Building Regulations apply to structural safety, fire protection, insulation, stairs and other technical aspects. Party-wall procedures may also be relevant where work affects shared structures.
The requirements depend on the property and the proposed work, so they should be checked for the individual project rather than assumed from a neighbouring house.
Common uses include a bedroom, en-suite, home office, guest room or private suite. The best layout depends on headroom, stairs, windows and storage requirements.
No. Some projects may fall within permitted development, while others require planning approval. The position depends on the property, proposed design and applicable restrictions.
Often yes, subject to layout, drainage, water supply, ventilation and structural considerations. It should be planned early because service routes affect the rest of the design.
Duration depends on the conversion type, structural work, approvals, specification and product lead times. A realistic programme follows an agreed scope.
Often the household can remain in the property, but access, noise, dust and temporary disruption need to be planned. The practical arrangement depends on the project.
Tell us how you want to use the new floor and what you know about the existing roof. We can discuss the practical constraints and the next steps required to define the work.