McLean Quinlan Wins Approval for High Weald Furnace House

Key facts

• Wealden District Council approved the 455-square-metre Hearth House under delegated officer powers.
• The application succeeded under policy HO11 of the NPPF, the updated isolated rural homes exception.
• Designed by McLean Quinlan, the home is shaped around a four-storey clay-red tower referencing historic iron furnaces.
• The multi-generational layout features separate living tiers for three generations centered on a ground-floor hearth.
• Construction on the Sussex countryside site is scheduled to commence in autumn 2027 with completion by autumn 2028.

Wealden District Council has granted planning permission for Hearth House, an isolated 455-square-metre country residence designed by McLean Quinlan in the High Weald National Landscape. Delegated planning officers approved the four-storey detached family home under policy HO11 of the revised National Planning Policy Framework (NPPF), as first reported by Architects' Journal.

What has been approved in the High Weald

The planning permission, granted under local reference WD/2025/2842/F, sanctions the construction of a bespoke multi-generational dwelling on an isolated rural plot in East Sussex. The scheme provides dedicated living quarters for three generations of one family, with private quarters arrayed vertically and horizontally around a central ground-level gathering space known as the hearth. Across its 455 square metres of internal floorspace, the layout pairs distinct self-contained living levels with communal dining, cooking and social areas.

Externally, the massing forms an asymmetric composition structured around a prominent four-storey central tower. This vertical marker is wrapped on multiple elevations by low-slung, single-storey monopitched lean-to structures that step down into the natural topography. Rather than mimicking a conventional pastoral domestic form, the geometry recreates the silhouettes of the historic blast furnaces and smelting hearths that once characterised Sussex woodlands.

To compensate for the isolated countryside position and satisfy national policy conditions on landscape engagement, the scheme introduces a public heritage interpretation feature. The owners will erect and maintain an illustrated historical information panel along the bordering public right of way, documenting the High Weald's former iron ore extractive works and processing history for ramblers and local residents.

The background and countryside planning policy

Securing consent for an isolated dwelling in open countryside remains one of the most demanding routes through the English planning system. The proposal was assessed under the NPPF's recently rebadged isolated homes provision, titled Policy HO11, which replaced the long-standing Paragraph 84 (and earlier Paragraph 80 and Paragraph 79 mechanisms). Under HO11, single residences away from defined settlement boundaries must display architectural standards of the highest caliber, significantly uplift their immediate setting, and remain responsive to local landscape characteristics.

While HO11 preserves the rigorous quality benchmarks established under earlier iterations of Paragraph 84 country houses, it incorporates a revised emphasis on the sensitive reuse or contextual referencing of historic rural sites. The application site sits within the High Weald National Landscape, an area afforded statutory protection under the Countryside and Rights of Way Act 2000, requiring planning authorities to give great weight to conserving natural beauty and landscape character.

The Weald was the industrial heartland of British ironmaking from pre-Roman times through the Tudor and Stuart eras, exploiting abundant supplies of Wealden iron ore, extensive oak forests for charcoal fuel, and steep streams dammed to power waterwheels. McLean Quinlan and planning consultants Hughes Planning worked alongside heritage advisers Statement Heritage to anchor the contemporary intervention within this forgotten industrial heritage, proving to Wealden District Council that the industrial precedent represented an authentic chapter of the landscape's evolution. Elsewhere in the South East, contextual regional character has played an equally pivotal role in securing permissions for sensitive sites, such as the Three Gables House in Langton Green.

The furnace-inspired design and environmental strategy

The building's central tower is finished in a deep clay-red masonry palette, formulated to mirror the oxidized iron ore strata unearthed historically across Sussex pits. McLean Quinlan arranged the upper masonry coursing with open-perforated hit-and-miss brickwork patterns. Backlit at dusk from interior luminaires, these apertures generate a diffuse external glow that invokes the visual memory of sparks and burning embers drifting from smelting chimneys.

In contrast to the dense, vertical brick tower, the peripheral monopitched lean-to buildings are enclosed in dark weathered timber weatherboarding. This dark-stained exterior replicates the tone and texture of historic charcoal burnings while visually receding against the surrounding tree canopy. Zinc metal finishes on the monopitch roofs add sharp horizontal datums, counterbalancing the organic textural timber and masonry walls.

Internally, the floor plates accommodate distinct domestic spheres connected by double-height transitional voids. The ground level houses the family gathering kitchen and open-plan hearth, establishing direct visual axes out to woodland clearings. The upper levels of the tower divide private accommodation into distinct autonomous tiers, providing long-term accessibility and acoustic separation for both older and younger generations.

The building envelope adheres to rigorous fabric-first performance targets. Broad roof overhangs project along the south and west elevations to attenuate intense summer solar radiation without compromising daylight admittance during the winter. Continuous air-barrier membranes, structural high-performance insulation boards, and triple-glazed windows work to curtail baseline heat loss, qualifying the envelope for low-energy operation.

Active building systems eliminate onsite fossil fuels entirely. Heating and hot water will be generated using a ground- or air-source heat pump network tied to radiant underfloor loops. An array of rooftop photovoltaic panels installed across the angled monopitch roofs will generate on-site electricity, integrated alongside a heat-recovery mechanical ventilation unit to guarantee continuous fresh air exchange without thermal inefficiency.

Landscape architecture by David Jarvis Landscape Architects reinforces the scheme’s conservation agenda. The external masterplan retains ancient field trees and enriches boundaries with native species replanting, hedgerow reinforcement, and sustainable drainage basins designed to manage regional surface runoff. Ecological assessments carried out by Ecology by Design and Arbtech confirmed that new native habitats and foraging corridors would provide a measurable biodiversity net gain across the holding.

What people are saying

Wealden District Council planning officers approved the application without referral to the planning committee, using delegated officer authority after statutory consultees raised no overriding objections. Case officers concluded that the scheme successfully fulfilled the tests of Policy HO11, noting that the architectural concept established a tangible connection to the historical land use while safeguarding the National Landscape.

Statutory heritage adviser Historic England reviewed the proposals during pre-application consultations and voiced formal backing for the design approach, commending the balance of sculptural expression and regional archaeology. The local design review panel independently scrutinised the design across multiple workshops, endorsing the tower's proportional relationship to the surrounding woodlands and validating the multi-generational floorplan.

Outlining the conceptual origins of the project, McLean Quinlan director Alastair Bowden highlighted how the region's industrial lineage guided the physical massing, stating that "the form of the historic iron furnaces offered a powerful architectural language, and we wanted to celebrate that unique form rather than simply reference it."

Bowden noted that the tower functions as a contemporary sculptural device that permanently grounds the domestic layout within the historical narrative of the site. Consultants Hughes Planning maintained that the resulting scheme satisfied both the stringent technical standards of isolated rural development and the duty of landscape enhancement mandated within protected Sussex terrain.

Next steps and construction programme

With full planning consent established, the client and project team will progress detailed technical specifications, structural engineering schematics, and building regulations submissions ahead of procurement. The approved planning decision notice attaches standard pre-commencement conditions governing archaeological recording across ground-breaking zones, arboricultural protection barriers, surface water drainage calculations, and final material discharge samples.

Contractor procurement and tender processes are scheduled to conclude during mid-2027. McLean Quinlan anticipates an on-site start in autumn 2027, followed by a twelve-month construction window that targets completion and family occupation in autumn 2028.

Timeline

1. October 2026Wealden District Council grants planning permission under delegated powers.
2. Autumn 2027Works scheduled to break ground on site in East Sussex.
3. Autumn 2028Target completion date for Hearth House construction and handover.

Why this matters

Securing planning consent under the rebadged Policy HO11 confirms that the English planning regime continues to permit isolated, exceptional country homes despite shifting national planning policy. McLean Quinlan’s success demonstrates how grounding a contemporary architectural language in regional industrial heritage—specifically the Wealden iron industry—can satisfy the rigorous tests of landscape enhancement within a designated National Landscape. The decision also provides an authoritative precedent for multi-generational domestic briefs, showing planning authorities that substantial rural homes can be justified when backed by high fabric-first energy standards, historic references and public interpretation.

Questions answered

what is hearth house in sussex

Hearth House is an approved 455-square-metre isolated country house in the High Weald designed by McLean Quinlan, inspired by the region's historic iron smelting furnaces.

who designed hearth house

The project was designed by British architectural practice McLean Quinlan, with landscape architecture led by David Jarvis Landscape Architects.

what is nppf policy ho11

Policy HO11 is the revised clause in the National Planning Policy Framework, previously known as Paragraph 84, permitting exceptional isolated homes in the open countryside.

why does hearth house have a tower

The four-storey clay-red tower references historical blast furnaces once prevalent across the Wealden iron industry and provides layered living tiers for three generations.

which council approved hearth house

Wealden District Council approved the planning application under delegated officer powers following endorsements from Historic England and a regional design review panel.

when will hearth house be built

Construction on the High Weald site is programmed to break ground in autumn 2027, with final completion scheduled for autumn 2028.

Source: originally reported by Architects' Journal.