Loft Conversion
Drawings Teesside
Professional planning permission drawings and building regulation plans for all loft conversion types. Dormer, hip-to-gable, Velux, and mansard — fixed price, fast turnaround, 97% first-time approval across Teesside.
Two Storey Rear
Extension Drawings
Teesside
Architectural Planning Drawings provides loft conversion drawings plans in Teesside from £750. We produce planning permission drawings, building regulation plans, and Lawful Development Certificate applications for all loft conversion types across Teesside. Most loft conversions qualify for Permitted Development — we confirm your eligibility for free. Covering Middlesbrough, Stockton, Redcar & Cleveland, and Hartlepool councils. Drawings delivered in 10–14 working days.
A loft conversion is one of the most cost-effective ways to add a bedroom and bathroom to a Teesside home — converting unused roof space into fully habitable living space without touching the garden or ground floor footprint. Done well, a loft conversion adds significant value to a property and avoids the disruption of moving house.
The two sets of drawings required — planning drawings and building regulation drawings — serve completely different purposes and are submitted to different authorities. We produce both, either separately or as a combined package, and manage the full submission process on your behalf.
Planning rules
Do you need planning permission for a loft conversion?
Do you need planning permission for a loft conversion?
Most loft conversions in Teesside qualify for Permitted Development — but the volume limits and roof plane rules catch some homeowners out.
| Rule | Permitted Development limit | Notes |
|---|---|---|
| Volume added — terraced house | No more than 40 cubic metres | Includes all previous roof additions since the original build |
| Volume added — detached / semi-detached | No more than 50 cubic metres | Previous loft additions count against this allowance |
| Front (highway-facing) roof slope | No extensions beyond existing plane | No front dormers under PD — always requires planning permission |
| Maximum height | No higher than existing ridge height | Extension must not exceed the highest part of the existing roof |
| Conservation areas | PD does not apply | Full planning permission required for any roof alteration in a conservation area |
| Side-facing windows (first floor level) | Must be obscure glazed | Non-opening unless openable part is 1.7m+ above floor level |
Conversion types
Loft conversion types we draw across Teesside
Each type has different planning implications and structural requirements. We advise on the most suitable type for your property during the free consultation.
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Velux / Rooflight conversion
Usually Permitted Development
The simplest and most cost-effective option. Rooflights are fitted within the existing roof slope — no structural changes to the roof shape. Ideal for properties with good existing roof height. Almost always qualifies for Permitted Development
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Mansard conversion
Usually needs planning – Replaces the rear roof slope with a near-vertical wall and shallow-pitched top, maximising floor space. A more significant alteration to the roof form that usually requires full planning permission. We manage the full application as part of the package.
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Rear dormer conversion
Usually Permitted Development
A box-shaped extension to the rear roof slope, creating a flat-roofed dormer that significantly increases headroom and floor area. The most popular loft conversion type on Teesside semi-detached houses. Rear dormers commonly qualify for PD.
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Front dormer
Always needs planning – A dormer on the principal front elevation. Never permitted under Permitted Development as it alters the street-facing roof slope. A full planning application is always required. Less common but achievable — particularly on detached properties set back from the road.
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Hip-to-gable conversion
Usually Permitted Development
Converts the sloped (hipped) end of a roof to a vertical gable, creating significantly more usable floor space. Common on detached and end-of-terrace properties. Usually qualifies for PD subject to volume limits.
Everything included in your fixed price
Our standard rear extension drawing package contains every document required by Teesside councils for a planning application. No hidden extras.
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Site Location Plan
OS-based 1:1250 scale plan showing your property in its local context. Required for every planning application.
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Existing Floor Plans
Accurate measured drawings of your existing ground floor layout, created from our site survey or your supplied measurements.
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Existing Elevations
External elevation drawings of your property as it currently stands — required to show what is changing.
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Planning Application Support
Guidance on submitting your application to the council, including advice on application fees and what to include in your submission.
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Block Plan
1:500 scale plan showing the site boundaries, the existing building footprint, and the proposed extension footprint.
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Proposed Floor Plans
Detailed floor plans showing the rear extension design, internal layout, dimensions, and connection to the existing property.
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Proposed Elevations
External elevation drawings showing the finished appearance of the rear extension, including materials notes where required.
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One Round of Revisions
If the council or your builder requests minor amendments to the drawings, one revision round is included in your fixed price.
Process
From first call to planning submission
1 – Free consultation — PD eligibility and fixed-price quote
We confirm whether your loft conversion qualifies for Permitted Development, identify the most suitable conversion type for your property, and give you a fixed-price quote for planning drawings, building reg drawings, or both.
💡 Useful to know in advance: your house type (terraced, semi, detached), whether any previous loft additions have been made, and the conversion type you’re considering.
2 – Site survey — roof structure and loft void measured
We visit your property to survey the existing roof structure, measure the loft void, and record all external elevations. For loft conversions, the survey also establishes existing ridge height and identifies structural constraints the building regulation drawings will need to address.
3 – Planning drawings — ready in 10–14 working days
We produce existing and proposed plans, roof plans, and all elevations showing the dormer or roof alteration. Draft drawings shared for your review and approval before submission.
4 – Planning / LDC submission and decision
We submit to Middlesbrough, Stockton, Redcar & Cleveland, or Hartlepool council as appropriate and monitor the application through the 8-week statutory decision period.
5 – Building regulation drawings — for your builder and building control
Once planning is confirmed, we produce detailed building regulation drawings including structural floor specification, fire protection details (30-minute fire doors, mains-wired smoke alarms), insulation to meet Part L, and staircase design. These are submitted to building control before work starts on site.
💡 All loft conversions require building regulations approval regardless of planning status — this is separate from planning and covers structural safety, fire protection, and energy performance.
FAQ
Loft conversion drawings — common questions
Do I need planning permission for a loft conversion in Teesside?
Most loft conversions qualify for Permitted Development and don’t need planning permission. The key rules are: no more than 40 cubic metres of new space for terraced houses (50 cubic metres for detached and semi-detached); no extensions beyond the plane of the front roof slope; no higher than the existing ridge; not in a conservation area; and side-facing first-floor windows must be obscure glazed. Rear dormers, hip-to-gable conversions, and Velux rooflights commonly qualify. Front dormers always require full planning permission.
What’s the difference between planning drawings and building regulation drawings?
Planning drawings show what the conversion looks like externally — roof form, dormer design, window positions, and materials. They go to the council for planning permission or to support a Lawful Development Certificate. Building regulation drawings are a completely separate, more technical set covering structural floor specification, fire protection (30-minute fire doors and mains smoke alarms), thermal insulation (Part L), ventilation, and staircase design. Both are required for most loft conversions, submitted to different authorities. We produce both, separately or as a combined package.
Do I need a Lawful Development Certificate for a PD loft conversion?
An LDC is not legally required if your conversion qualifies for Permitted Development — you can build without one. However, we strongly recommend it. An LDC is a formal written confirmation from the council that your conversion is lawful, which solicitors require when you sell and mortgage lenders increasingly expect.
Do I need a Lawful Development Certificate if my two storey rear extension is Permitted Development?
A Lawful Development Certificate is not legally required — you can build under Permitted Development without one. However, we strongly recommend obtaining an LDC. It provides formal written confirmation from the council that the extension is lawful, which solicitors and mortgage lenders increasingly require when you come to sell. Without an LDC, the lawfulness of the extension depends on measurements and records you’ll need to produce from scratch years later. The LDC application typically takes 8 weeks — we manage the application as part of our drawings package.
How much does a loft conversion cost in Teesside?
Build costs for a loft conversion in Teesside typically range from £25,000 to £60,000 depending on conversion type, size, specification, and whether an en-suite is included. A Velux conversion is the most affordable option. A rear dormer or hip-to-gable with en-suite bedroom sits at the higher end.
Can I have a bathroom in my loft conversion?
Yes — en-suite bathrooms and shower rooms are common in loft conversions and are shown in the proposed floor plans we produce. The building regulation drawings cover the structural implications of the additional load, ventilation requirements for the bathroom, and the drainage connections needed. We coordinate these requirements between the planning and building regulation drawing packages to ensure everything is covered.
Do you cover my area? Which parts of Teesside do you serve?
We cover the whole of Teesside and the surrounding area, including Middlesbrough, Stockton-on-Tees, Redcar, Hartlepool, Thornaby, Billingham, Yarm, Guisborough, Saltburn, Ingleby Barwick, Marton, Acklam, Nunthorpe, Norton, and Darlington. We also work on projects in North Yorkshire and County Durham on request. If you’re unsure whether we cover your area, just call us on 07468455796
Loft Conversion drawings across Teesside
We provide architectural drawings across all of the following areas.
Middlesbrough Stockton-on-Tees Redcar Hartlepool Thornaby Billingham Yarm Guisborough Saltburn-by-the-Sea Ingleby Barwick Marton Acklam Nunthorpe Norton Darlington Skelton Loftus Eston North Yorkshire County Durham
