Twenty-one proposals for development were received by Loudoun County planners by last week under a seldom-used process that allows landowners and developers to seek changes in the countywide development blueprint if circumstances have changed significantly or if they think they have a creative idea that would augment the county's land-use vision.

Home builders and other advocates say county plans must change to accommodate the diverse pay scales of the county's growing employment base, and they argue that suburban lots are becoming scarce.

The proposals are:

1. Westport: About 590 acres on the south side of Route 50, west of Goshen Road, east of Lenah Road and north of Braddock Road. Proposes new residential neighborhood community policies (transitional residential neighborhoods) for the Transition Policy Area (Leesburg to south of Dulles International Airport) with as many as 3.5 residences per acre in the Upper Broad Run sub area of the Transition Policy Area (Dulles District).

2. Crosstrail: 508 acres on the east side of the Dulles Greenway, west of Leesburg Executive Airport, between the planned Battlefield Parkway and Crosstrail Boulevard interchanges adjacent to the town of Leesburg in the Leesburg Joint Land Management Area (JLMA). (The acreage is county land outside town limits, but it is where both governments are supposed to consult on land use.) Proposes change to planned land use from keynote employment to a mix of uses, including town center, retail, office, multifamily and age-restricted housing and airport-related uses, and to permit the Town of Leesburg and the Loudoun County Sanitation Authority to provide utilities within the JLMA (Catoctin District).

3. Creekside: 1,076.5 acres south of Leesburg, east of Sycolin Road and north of Goose Creek. Proposes to expand the Leesburg JLMA and change planned land uses from keynote employment, JLMA, mixed-use business and Transition Policy Area to town center and low-density residential, and to permit the Town of Leesburg and the county sanitation authority to provide utilities within the JLMA (Catoctin District).

4. Greenvest/Dulles South: 4,200 acres. Four properties north and south of Route 50, west of planned relocated Route 659, south of Evergreen Mills Road and north of Bull Run. Proposes to change planned land uses to provide adult and age-restricted housing, a workforce housing initiative, a hospital and residential densities up to an average of 3.5 residences per acre in the Upper Broad Run and Upper Foley sub areas of the Transition Policy Area; adjust the policy area boundary; and implement the planned road network through advanced construction of major network components and an innovative funding mechanism for major regional infrastructure, including roads, utilities, parks and schools (Dulles District).

5. Shockey Family: 291 acres on the north side of Route 50, south of Evergreen Mills Road, east of Fleetwood Road and west of Gum Spring Road. Proposes land-use map change from general industrial to mixed-use business (Dulles District).

6. Erickson Retirement Communities: 135 acres on the west side of Route 607 (Loudoun County Parkway) between Route 7 and Smith Switch Road. Proposes to amend the business land-use policies and add new housing policies to allow continuing care retirement campus-style communities (Broad Run District).

7. Assaad Property: 67.75 acres on the north side of West Colonial Highway and west of North Reid Street near Hamilton. Proposes to amend the Revised Comprehensive Plan and the Town of Hamilton Plan to change the land-use designation from Rural Policy Area to Joint Land Management Area (Blue Ridge District).

8. Stonegate: 100 acres on the west side of Smith Switch Road, south of the W&OD trail. Proposes to change the planned land use from business to residential (Broad Run District).

9. Victoria Station: 15 acres on the north side of Victoria Station Drive, west of Cascades Parkway, southeast of Ashgrove Court and south of Woodland Road. Proposes to change the planned land use from keynote employment to business or high-density residential (Potomac District).

10. Stone Ridge West: 232 acres on the south side of Route 50, west of planned relocated Route 659 and east of Goshen Road. Proposes an adjustment of the policy area boundary to accommodate the realignment of Route 659 and new residential neighborhood community policies (transitional residential neighborhoods) with densities up to 3.5 residences per acre in the Upper Broad Run sub area of the Transition Policy Area (Dulles District).

11. Middle Goose/Criswell: 494 acres on the north side of Ryan Road, east of Evergreen Mills Road, south of Evergreen Rural Village and west of Beaverdam Reservoir. Proposes a change in policy to allow densities of one residence per acre in the Middle Goose sub area of the Transition Policy Area (Dulles District).

12. Rouse Transitional Residential Neighborhood: 927.09 acres on the north side of Route 50, south of Evergreen Mills Road and west of Fleetwood Road. Proposes new residential neighborhood community policies (transitional mixed-use residential) to allow a mixed-use development in a planned community of up to 3.5 residences per acre and maximum commercial and nonresidential uses in the Upper Broad Run sub area of the Transition Policy Area (Dulles District).

13. Fern Cliff: 420.75 acres on the west side of Route 15 adjoining Morven Park International Equestrian Center to the south and Raspberry Falls to the north. Proposes a change in planned land use from rural policy area to rural policy area-adult residential (Catoctin District).

14. Braddock Village: 48.5 acres on the south side of Braddock Road at Goshen Road and west of planned relocated Route 659. Proposes new residential neighborhood community policies (transitional residential neighborhoods) for the Transition Policy Area with densities up to 3.5 residences per acre (Dulles District).

15. Loudoun Parkway Center: 210.5 acres in the northwest, northeast and southeast quadrants of the Loudoun County Parkway and Dulles Greenway interchange. Proposes to change the planned land use from keynote employment to mixed-use business, including town center, destination retail and residential uses (Dulles District).

16. Potomac Farms: 67 acres north of Route 7, west of the Potomac Farms subdivision and east of Janelia Farm. Proposes change to planned land use from keynote employment to mixed-use town center, including retail, residential and office uses (Broad Run District).

17. Dulles 28 Center: 180 acres on the east side of Route 28, west of Pacific Boulevard, south of the W&OD trail and north of Waxpool Road. Proposes to change the planned land use from keynote employment to mixed-use business and to amend the countywide retail policy plan to allow a moderate- to high-density residential component in destination retail areas in the Route 28 tax district (Dulles District).

18 and 19. Diamond Lakes (1 and 2): 87 acres combined east of Route 28, south of Route 606, west of the Fairfax County border and Rock Hill Road and north of the Dulles Toll Road. Proposes to change the planned land use to urban center and multimodal transportation district to allow a stadium facility in a higher density mixed-use designation in the Route 28 tax district (Dulles District).

20. Dulles Parkway Center: 52.9 acres in the southwest quadrant of the intersection of the Dulles Greenway and the Loudoun County Parkway. Proposes to change the planned land use from keynote employment and transit oriented development to mixed-use business and destination retail (Dulles District).

21. One Loudoun Center: 362 acres in the southwest quadrant of the intersection of Loudoun County Parkway and Route 7. Proposes a change in the planned land use to add a town center designation to the keynote employment and mixed-use business areas and to change the planned land use to residential on the western portion of the property (Broad Run District).