Loft Conversions

Expand your home. Preserve your garden.

Tarj Construction transforms unused roof space into high-performance, fully habitable rooms. From straightforward rooflight conversions to complex hip-to-gable and mansard builds, we manage the entire process—including heavy structural steelwork, Part K staircase integration, and securing your crucial Building Control certification.

Structurally sound. Legally certified.

A loft conversion is the most effective way to add a master suite, bedroom, or home office without sacrificing your outdoor space. However, creating a legal, habitable room requires far more than simply boarding the floor. It demands safe structural load distribution (RSJs), Part B compliant fire safety measures, and intelligent staircase positioning so the new floor flows naturally from your existing landing. Tarj Construction manages this complexity across London and Essex from initial Permitted Development checks through to final Local Authority Building Control (LABC) handover, ensuring your new space adds genuine, bankable value to your property.

Dormer Loft Conversions
Hip-to-Gable Loft Conversions
Mansard Loft Conversions

Rooflight / Velux Conversions
Master Suites, Bedrooms & Home Offices

Complete Loft Conversion Delivery

From structural assessment to final finish.

Survey, Feasibility & Structural Planning

The right loft conversion begins with understanding the roof structure and usable floor area, supported by proactive construction risk management to ensure feasibility across your London or Essex property.

Initial loft survey, Permitted Development and Planning Permission review
Assessment of head height and practical volume calculations
Structural design coordination with engineers
Guidance on the Party Wall etc. Act 1996 for shared boundary walls and chimneys
Building Regulations planning and compliance strategy

Structural Floor & Roof Alterations

A loft must be heavily strengthened to function as living accommodation, monitored closely through our quality assurance & site oversight.

New structural floor formation and joist strengthening
Steel beam installation (RSJs/Universal Beams) for load distribution
Roof structure alterations (e.g., purlin and truss modifications)
Dormer, mansard, or hip-to-gable roofline construction
Weatherproofing and structural junction integration

Access, Layout & Internal Construction

A successful conversion depends on sensible layout planning and internal works that fit naturally and compliantly within the home.

Part K compliant staircase positioning and access integration
Partition walls and room layout formation
NICEIC electrical wiring and lighting installation
Gas Safe plumbing and heating integration for en-suites
Custom joinery, eaves storage and internal carpentry

Insulation, Ventilation & Fire Safety

Roof-space conversions must meet strict Building Regulations, a process managed through our building safety audits.

Part L compliant thermal insulation upgrades (PIR/Mineral wool)
Part F compliant ventilation strategy for roof spaces and bathrooms
Part B fire safety compliance, including protected escape routes
Installation of FD30 fire doors to habitable rooms
Mains-powered, interlinked smoke alarm (Grade D1) integration

Final Finishes, Inspection & Handover

The final stage ensures the new loft room is complete and legally compliant, secured by our project governance & documentation.

Plastering, decorating-ready finishes and final joinery
Local Authority Building Control (LABC) or Approved Inspector stage inspections
CDM 2015 health and safety compliance and final handover
Compilation of electrical, gas, and structural certificates
Preparation of the final Health and Safety File and Completion Certificate

Why Loft Conversions Work

Extra room, better layout and
long-term property value.

Adds Valuable Living Space

Create an extra bedroom, home office, or master suite by building upwards, allowing you to expand your home without sacrificing precious UK garden space or paying heavy UK Stamp Duty and legal fees to move.

Makes Use of Existing Roof Volume

Unlock the dead space already within your property. Many UK loft conversions fall under Permitted Development (PD) rights, which we verify through early construction risk management to streamline the planning phase.

Improves Home Functionality

Ideal for growing families or creating a dedicated top-floor sanctuary. We ensure structural integrity and Part K compliant stair access, monitored via our quality assurance oversight, so the new space flows naturally from the existing house.

Legally Protected Property Value

A loft without Building Control sign-off is legally just a storage room. Through rigorous project governance, we secure your LABC Completion Certificate and Part B fire safety compliance, ensuring your conversion adds official, bankable value to your home.

Planned carefully. Delivered safely.

How we deliver loft conversions.

We keep compliance practical: clear stages, documented evidence, and a trail you can rely on for governance and audit.

01. Initial Survey & Feasibility

Assessing precise roof headroom, usable floor area, and checking your Permitted Development (PD) rights across your London or Essex property.

02. Structural & Architectural Design

Coordinating engineer calculations (RSJs), Part K staircase positioning, and Party Wall Act requirements.

03. Site Setup & Weatherproofing

Erecting independent scaffolding and temporary roof protection so our trades can work without traipsing through your home.

04. Structural Build Phase

Strengthening floor joists, installing heavy steel beams, and constructing the dormer, mansard, or roofline alterations.

05. Internal Fit-Out & Compliance

Installing Part L compliant insulation, Part B fire safety measures (including FD30 doors), and completing all electrical and plumbing first-fix.

06. Final Inspection & Handover

Executing a final builders' handover clean, completing decorating-ready plastering, and securing your Local Authority Building Control (LABC) sign-off.

Thinking about converting your loft?

Turn unused roof space into something practical, spacious, compliant, valuable.

Speak with our construction team about your loft conversion plans. We’ll help assess feasibility, coordinate the structure properly and deliver a finished space that works naturally as part of your home.

Discuss Your Loft Conversion →

Frequently asked questions

Yes, absolutely. Even if your loft falls under Permitted Development and doesn't need planning permission, it must still pass strict UK Building Regulations. This includes Part B (Fire Safety, often requiring FD30 fire doors), Part K (Staircase headroom), and Part L (Insulation). We manage this entire process so your loft is legally classed as a habitable room, not just storage space.

In almost all UK homes, yes. Existing ceiling joists are only designed to hold the weight of the plasterboard below, not furniture and people. We install entirely new structural floor joists and heavy steel beams (RSJs) to safely distribute the new loads into the load-bearing or party walls, ensuring the floor is rigid, safe, and bounce-free.

Yes. The best solution—whether a simple Velux/rooflight conversion, a flat-roof dormer, a hip-to-gable, or a mansard—depends on your existing roof pitch, ridge height, and local planning constraints. We assess your usable headroom and coordinate with structural engineers to maximize your space while navigating Permitted Development rules.

Yes, adding an en-suite is incredibly popular for master suites. However, it requires careful planning for exterior soil stack (drainage) connections, water pressure, and Part F compliant mechanical ventilation. We manage the complete installation, utilizing Gas Safe plumbers and NICEIC electricians to ensure it is safe and fully compliant.

Yes. This is the most critical part of protecting your investment. We coordinate all mandatory stage inspections with Local Authority Building Control (LABC) or your Approved Inspector. At handover, we provide your official Completion Certificate alongside all Part P electrical and gas safety certificates, proving your home's added value to future buyers.